Re: how "tight" should the crankshaft be with new bearings?
04-05-2004, 01:49 AM
#31
Guest
Posts: n/a
Re: how "tight" should the crankshaft be with new bearings?
Do you want me to use the book that I used for the 4 years that I worked in
a racing engine shop, or do you have a specific one in mind?
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> That's on new:
>
> not a regrind.
>
> So like I said, go look in the book that crankshaft grinders use. You'll
be
> surprised, and more surprised at what they use for gauges to check the
> stones when they dress them.
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > I guess Lunati and all of the other aftermarket crank manufacturers have
> > been doing it wrong all these years.
> >
> > http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> >
> > It is common knowledge that a radius reduces the chance for a stress
crack
> > by ditributing the stresses evenly across the radius. The bigger the
> radius,
> > the more area to absorbs stresses.
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > It's called a bearing knife or bearing scraper:
> > >
> > > But, if you have an excessively large fillet radius, especially in a
> cast
> > > iron crankshaft. that is the perfect place for a radial crack to
begin.
> > >
> > > The fillet radius should be ground with the stone dressed to the
propper
> > > radius for the crankshaft in the machine.
> > >
> > > Refinish King
> > >
> > >
> > > "HLS" <Sorry@nospam> wrote in message
> > > news:10719qskrk8ad4f@corp.supernews.com...
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > If they did that:
> > > > >
> > > > > They're asking for a crack to happen. Read the manual, for every
> > crank,
> > > > > there is a specified fillet radius!
> > > > >
> > > > > Refinish King
> > > >
> > > > A radiused fillet is less likely to crack than a sharply ground one,
> re
> > > the
> > > > stress raiser
> > > > phenomenon we have discussed before.. I think that more often than
> not,
> > > the
> > > > fillet
> > > > is not intented to be left overly large...it is probably a result of
> > less
> > > > than precise machining.
> > > >
> > > > It can interfere with the edge of the bearing, just as "c" said.
> > > >
> > > > I never heard of anyone using narrower bearings, but they do
'relieve'
> > the
> > > > edge of the
> > > > bearing where it might contact the fillet.
> > > >
> > > > Seems I have seen a special tool to do this, but don't have one
> myself.
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>
a racing engine shop, or do you have a specific one in mind?
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> That's on new:
>
> not a regrind.
>
> So like I said, go look in the book that crankshaft grinders use. You'll
be
> surprised, and more surprised at what they use for gauges to check the
> stones when they dress them.
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > I guess Lunati and all of the other aftermarket crank manufacturers have
> > been doing it wrong all these years.
> >
> > http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> >
> > It is common knowledge that a radius reduces the chance for a stress
crack
> > by ditributing the stresses evenly across the radius. The bigger the
> radius,
> > the more area to absorbs stresses.
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > It's called a bearing knife or bearing scraper:
> > >
> > > But, if you have an excessively large fillet radius, especially in a
> cast
> > > iron crankshaft. that is the perfect place for a radial crack to
begin.
> > >
> > > The fillet radius should be ground with the stone dressed to the
propper
> > > radius for the crankshaft in the machine.
> > >
> > > Refinish King
> > >
> > >
> > > "HLS" <Sorry@nospam> wrote in message
> > > news:10719qskrk8ad4f@corp.supernews.com...
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > If they did that:
> > > > >
> > > > > They're asking for a crack to happen. Read the manual, for every
> > crank,
> > > > > there is a specified fillet radius!
> > > > >
> > > > > Refinish King
> > > >
> > > > A radiused fillet is less likely to crack than a sharply ground one,
> re
> > > the
> > > > stress raiser
> > > > phenomenon we have discussed before.. I think that more often than
> not,
> > > the
> > > > fillet
> > > > is not intented to be left overly large...it is probably a result of
> > less
> > > > than precise machining.
> > > >
> > > > It can interfere with the edge of the bearing, just as "c" said.
> > > >
> > > > I never heard of anyone using narrower bearings, but they do
'relieve'
> > the
> > > > edge of the
> > > > bearing where it might contact the fillet.
> > > >
> > > > Seems I have seen a special tool to do this, but don't have one
> myself.
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>
04-05-2004, 01:49 AM
#32
Guest
Posts: n/a
Re: how "tight" should the crankshaft be with new bearings?
Do you want me to use the book that I used for the 4 years that I worked in
a racing engine shop, or do you have a specific one in mind?
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> That's on new:
>
> not a regrind.
>
> So like I said, go look in the book that crankshaft grinders use. You'll
be
> surprised, and more surprised at what they use for gauges to check the
> stones when they dress them.
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > I guess Lunati and all of the other aftermarket crank manufacturers have
> > been doing it wrong all these years.
> >
> > http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> >
> > It is common knowledge that a radius reduces the chance for a stress
crack
> > by ditributing the stresses evenly across the radius. The bigger the
> radius,
> > the more area to absorbs stresses.
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > It's called a bearing knife or bearing scraper:
> > >
> > > But, if you have an excessively large fillet radius, especially in a
> cast
> > > iron crankshaft. that is the perfect place for a radial crack to
begin.
> > >
> > > The fillet radius should be ground with the stone dressed to the
propper
> > > radius for the crankshaft in the machine.
> > >
> > > Refinish King
> > >
> > >
> > > "HLS" <Sorry@nospam> wrote in message
> > > news:10719qskrk8ad4f@corp.supernews.com...
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > If they did that:
> > > > >
> > > > > They're asking for a crack to happen. Read the manual, for every
> > crank,
> > > > > there is a specified fillet radius!
> > > > >
> > > > > Refinish King
> > > >
> > > > A radiused fillet is less likely to crack than a sharply ground one,
> re
> > > the
> > > > stress raiser
> > > > phenomenon we have discussed before.. I think that more often than
> not,
> > > the
> > > > fillet
> > > > is not intented to be left overly large...it is probably a result of
> > less
> > > > than precise machining.
> > > >
> > > > It can interfere with the edge of the bearing, just as "c" said.
> > > >
> > > > I never heard of anyone using narrower bearings, but they do
'relieve'
> > the
> > > > edge of the
> > > > bearing where it might contact the fillet.
> > > >
> > > > Seems I have seen a special tool to do this, but don't have one
> myself.
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>
a racing engine shop, or do you have a specific one in mind?
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> That's on new:
>
> not a regrind.
>
> So like I said, go look in the book that crankshaft grinders use. You'll
be
> surprised, and more surprised at what they use for gauges to check the
> stones when they dress them.
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > I guess Lunati and all of the other aftermarket crank manufacturers have
> > been doing it wrong all these years.
> >
> > http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> >
> > It is common knowledge that a radius reduces the chance for a stress
crack
> > by ditributing the stresses evenly across the radius. The bigger the
> radius,
> > the more area to absorbs stresses.
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > It's called a bearing knife or bearing scraper:
> > >
> > > But, if you have an excessively large fillet radius, especially in a
> cast
> > > iron crankshaft. that is the perfect place for a radial crack to
begin.
> > >
> > > The fillet radius should be ground with the stone dressed to the
propper
> > > radius for the crankshaft in the machine.
> > >
> > > Refinish King
> > >
> > >
> > > "HLS" <Sorry@nospam> wrote in message
> > > news:10719qskrk8ad4f@corp.supernews.com...
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > If they did that:
> > > > >
> > > > > They're asking for a crack to happen. Read the manual, for every
> > crank,
> > > > > there is a specified fillet radius!
> > > > >
> > > > > Refinish King
> > > >
> > > > A radiused fillet is less likely to crack than a sharply ground one,
> re
> > > the
> > > > stress raiser
> > > > phenomenon we have discussed before.. I think that more often than
> not,
> > > the
> > > > fillet
> > > > is not intented to be left overly large...it is probably a result of
> > less
> > > > than precise machining.
> > > >
> > > > It can interfere with the edge of the bearing, just as "c" said.
> > > >
> > > > I never heard of anyone using narrower bearings, but they do
'relieve'
> > the
> > > > edge of the
> > > > bearing where it might contact the fillet.
> > > >
> > > > Seems I have seen a special tool to do this, but don't have one
> myself.
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>
04-05-2004, 01:49 AM
#33
Guest
Posts: n/a
Re: how "tight" should the crankshaft be with new bearings?
Do you want me to use the book that I used for the 4 years that I worked in
a racing engine shop, or do you have a specific one in mind?
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> That's on new:
>
> not a regrind.
>
> So like I said, go look in the book that crankshaft grinders use. You'll
be
> surprised, and more surprised at what they use for gauges to check the
> stones when they dress them.
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > I guess Lunati and all of the other aftermarket crank manufacturers have
> > been doing it wrong all these years.
> >
> > http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> >
> > It is common knowledge that a radius reduces the chance for a stress
crack
> > by ditributing the stresses evenly across the radius. The bigger the
> radius,
> > the more area to absorbs stresses.
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > It's called a bearing knife or bearing scraper:
> > >
> > > But, if you have an excessively large fillet radius, especially in a
> cast
> > > iron crankshaft. that is the perfect place for a radial crack to
begin.
> > >
> > > The fillet radius should be ground with the stone dressed to the
propper
> > > radius for the crankshaft in the machine.
> > >
> > > Refinish King
> > >
> > >
> > > "HLS" <Sorry@nospam> wrote in message
> > > news:10719qskrk8ad4f@corp.supernews.com...
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > If they did that:
> > > > >
> > > > > They're asking for a crack to happen. Read the manual, for every
> > crank,
> > > > > there is a specified fillet radius!
> > > > >
> > > > > Refinish King
> > > >
> > > > A radiused fillet is less likely to crack than a sharply ground one,
> re
> > > the
> > > > stress raiser
> > > > phenomenon we have discussed before.. I think that more often than
> not,
> > > the
> > > > fillet
> > > > is not intented to be left overly large...it is probably a result of
> > less
> > > > than precise machining.
> > > >
> > > > It can interfere with the edge of the bearing, just as "c" said.
> > > >
> > > > I never heard of anyone using narrower bearings, but they do
'relieve'
> > the
> > > > edge of the
> > > > bearing where it might contact the fillet.
> > > >
> > > > Seems I have seen a special tool to do this, but don't have one
> myself.
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>
a racing engine shop, or do you have a specific one in mind?
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> That's on new:
>
> not a regrind.
>
> So like I said, go look in the book that crankshaft grinders use. You'll
be
> surprised, and more surprised at what they use for gauges to check the
> stones when they dress them.
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > I guess Lunati and all of the other aftermarket crank manufacturers have
> > been doing it wrong all these years.
> >
> > http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> >
> > It is common knowledge that a radius reduces the chance for a stress
crack
> > by ditributing the stresses evenly across the radius. The bigger the
> radius,
> > the more area to absorbs stresses.
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > It's called a bearing knife or bearing scraper:
> > >
> > > But, if you have an excessively large fillet radius, especially in a
> cast
> > > iron crankshaft. that is the perfect place for a radial crack to
begin.
> > >
> > > The fillet radius should be ground with the stone dressed to the
propper
> > > radius for the crankshaft in the machine.
> > >
> > > Refinish King
> > >
> > >
> > > "HLS" <Sorry@nospam> wrote in message
> > > news:10719qskrk8ad4f@corp.supernews.com...
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > If they did that:
> > > > >
> > > > > They're asking for a crack to happen. Read the manual, for every
> > crank,
> > > > > there is a specified fillet radius!
> > > > >
> > > > > Refinish King
> > > >
> > > > A radiused fillet is less likely to crack than a sharply ground one,
> re
> > > the
> > > > stress raiser
> > > > phenomenon we have discussed before.. I think that more often than
> not,
> > > the
> > > > fillet
> > > > is not intented to be left overly large...it is probably a result of
> > less
> > > > than precise machining.
> > > >
> > > > It can interfere with the edge of the bearing, just as "c" said.
> > > >
> > > > I never heard of anyone using narrower bearings, but they do
'relieve'
> > the
> > > > edge of the
> > > > bearing where it might contact the fillet.
> > > >
> > > > Seems I have seen a special tool to do this, but don't have one
> myself.
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>
04-05-2004, 12:48 PM
#34
Guest
Posts: n/a
Re: how "tight" should the crankshaft be with new bearings?
APRA Crankshaft specifications and tolerances!
Racing engine shops use different tollerances, I've been there!
Refinish King
"c" <c@me.org> wrote in message
news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> Do you want me to use the book that I used for the 4 years that I worked
in
> a racing engine shop, or do you have a specific one in mind?
>
> Chris
>
>
> "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > That's on new:
> >
> > not a regrind.
> >
> > So like I said, go look in the book that crankshaft grinders use. You'll
> be
> > surprised, and more surprised at what they use for gauges to check the
> > stones when they dress them.
> >
> > Refinish King
> >
> >
> > "c" <c@me.org> wrote in message
> > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > I guess Lunati and all of the other aftermarket crank manufacturers
have
> > > been doing it wrong all these years.
> > >
> > >
http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > >
> > > It is common knowledge that a radius reduces the chance for a stress
> crack
> > > by ditributing the stresses evenly across the radius. The bigger the
> > radius,
> > > the more area to absorbs stresses.
> > >
> > > Chris
> > >
> > >
> > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > It's called a bearing knife or bearing scraper:
> > > >
> > > > But, if you have an excessively large fillet radius, especially in a
> > cast
> > > > iron crankshaft. that is the perfect place for a radial crack to
> begin.
> > > >
> > > > The fillet radius should be ground with the stone dressed to the
> propper
> > > > radius for the crankshaft in the machine.
> > > >
> > > > Refinish King
> > > >
> > > >
> > > > "HLS" <Sorry@nospam> wrote in message
> > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > >
> > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
> in
> > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > If they did that:
> > > > > >
> > > > > > They're asking for a crack to happen. Read the manual, for every
> > > crank,
> > > > > > there is a specified fillet radius!
> > > > > >
> > > > > > Refinish King
> > > > >
> > > > > A radiused fillet is less likely to crack than a sharply ground
one,
> > re
> > > > the
> > > > > stress raiser
> > > > > phenomenon we have discussed before.. I think that more often
than
> > not,
> > > > the
> > > > > fillet
> > > > > is not intented to be left overly large...it is probably a result
of
> > > less
> > > > > than precise machining.
> > > > >
> > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > >
> > > > > I never heard of anyone using narrower bearings, but they do
> 'relieve'
> > > the
> > > > > edge of the
> > > > > bearing where it might contact the fillet.
> > > > >
> > > > > Seems I have seen a special tool to do this, but don't have one
> > myself.
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
>
>
Racing engine shops use different tollerances, I've been there!
Refinish King
"c" <c@me.org> wrote in message
news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> Do you want me to use the book that I used for the 4 years that I worked
in
> a racing engine shop, or do you have a specific one in mind?
>
> Chris
>
>
> "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > That's on new:
> >
> > not a regrind.
> >
> > So like I said, go look in the book that crankshaft grinders use. You'll
> be
> > surprised, and more surprised at what they use for gauges to check the
> > stones when they dress them.
> >
> > Refinish King
> >
> >
> > "c" <c@me.org> wrote in message
> > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > I guess Lunati and all of the other aftermarket crank manufacturers
have
> > > been doing it wrong all these years.
> > >
> > >
http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > >
> > > It is common knowledge that a radius reduces the chance for a stress
> crack
> > > by ditributing the stresses evenly across the radius. The bigger the
> > radius,
> > > the more area to absorbs stresses.
> > >
> > > Chris
> > >
> > >
> > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > It's called a bearing knife or bearing scraper:
> > > >
> > > > But, if you have an excessively large fillet radius, especially in a
> > cast
> > > > iron crankshaft. that is the perfect place for a radial crack to
> begin.
> > > >
> > > > The fillet radius should be ground with the stone dressed to the
> propper
> > > > radius for the crankshaft in the machine.
> > > >
> > > > Refinish King
> > > >
> > > >
> > > > "HLS" <Sorry@nospam> wrote in message
> > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > >
> > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
> in
> > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > If they did that:
> > > > > >
> > > > > > They're asking for a crack to happen. Read the manual, for every
> > > crank,
> > > > > > there is a specified fillet radius!
> > > > > >
> > > > > > Refinish King
> > > > >
> > > > > A radiused fillet is less likely to crack than a sharply ground
one,
> > re
> > > > the
> > > > > stress raiser
> > > > > phenomenon we have discussed before.. I think that more often
than
> > not,
> > > > the
> > > > > fillet
> > > > > is not intented to be left overly large...it is probably a result
of
> > > less
> > > > > than precise machining.
> > > > >
> > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > >
> > > > > I never heard of anyone using narrower bearings, but they do
> 'relieve'
> > > the
> > > > > edge of the
> > > > > bearing where it might contact the fillet.
> > > > >
> > > > > Seems I have seen a special tool to do this, but don't have one
> > myself.
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
>
>
04-05-2004, 12:48 PM
#35
Guest
Posts: n/a
Re: how "tight" should the crankshaft be with new bearings?
APRA Crankshaft specifications and tolerances!
Racing engine shops use different tollerances, I've been there!
Refinish King
"c" <c@me.org> wrote in message
news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> Do you want me to use the book that I used for the 4 years that I worked
in
> a racing engine shop, or do you have a specific one in mind?
>
> Chris
>
>
> "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > That's on new:
> >
> > not a regrind.
> >
> > So like I said, go look in the book that crankshaft grinders use. You'll
> be
> > surprised, and more surprised at what they use for gauges to check the
> > stones when they dress them.
> >
> > Refinish King
> >
> >
> > "c" <c@me.org> wrote in message
> > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > I guess Lunati and all of the other aftermarket crank manufacturers
have
> > > been doing it wrong all these years.
> > >
> > >
http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > >
> > > It is common knowledge that a radius reduces the chance for a stress
> crack
> > > by ditributing the stresses evenly across the radius. The bigger the
> > radius,
> > > the more area to absorbs stresses.
> > >
> > > Chris
> > >
> > >
> > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > It's called a bearing knife or bearing scraper:
> > > >
> > > > But, if you have an excessively large fillet radius, especially in a
> > cast
> > > > iron crankshaft. that is the perfect place for a radial crack to
> begin.
> > > >
> > > > The fillet radius should be ground with the stone dressed to the
> propper
> > > > radius for the crankshaft in the machine.
> > > >
> > > > Refinish King
> > > >
> > > >
> > > > "HLS" <Sorry@nospam> wrote in message
> > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > >
> > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
> in
> > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > If they did that:
> > > > > >
> > > > > > They're asking for a crack to happen. Read the manual, for every
> > > crank,
> > > > > > there is a specified fillet radius!
> > > > > >
> > > > > > Refinish King
> > > > >
> > > > > A radiused fillet is less likely to crack than a sharply ground
one,
> > re
> > > > the
> > > > > stress raiser
> > > > > phenomenon we have discussed before.. I think that more often
than
> > not,
> > > > the
> > > > > fillet
> > > > > is not intented to be left overly large...it is probably a result
of
> > > less
> > > > > than precise machining.
> > > > >
> > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > >
> > > > > I never heard of anyone using narrower bearings, but they do
> 'relieve'
> > > the
> > > > > edge of the
> > > > > bearing where it might contact the fillet.
> > > > >
> > > > > Seems I have seen a special tool to do this, but don't have one
> > myself.
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
>
>
Racing engine shops use different tollerances, I've been there!
Refinish King
"c" <c@me.org> wrote in message
news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> Do you want me to use the book that I used for the 4 years that I worked
in
> a racing engine shop, or do you have a specific one in mind?
>
> Chris
>
>
> "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > That's on new:
> >
> > not a regrind.
> >
> > So like I said, go look in the book that crankshaft grinders use. You'll
> be
> > surprised, and more surprised at what they use for gauges to check the
> > stones when they dress them.
> >
> > Refinish King
> >
> >
> > "c" <c@me.org> wrote in message
> > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > I guess Lunati and all of the other aftermarket crank manufacturers
have
> > > been doing it wrong all these years.
> > >
> > >
http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > >
> > > It is common knowledge that a radius reduces the chance for a stress
> crack
> > > by ditributing the stresses evenly across the radius. The bigger the
> > radius,
> > > the more area to absorbs stresses.
> > >
> > > Chris
> > >
> > >
> > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > It's called a bearing knife or bearing scraper:
> > > >
> > > > But, if you have an excessively large fillet radius, especially in a
> > cast
> > > > iron crankshaft. that is the perfect place for a radial crack to
> begin.
> > > >
> > > > The fillet radius should be ground with the stone dressed to the
> propper
> > > > radius for the crankshaft in the machine.
> > > >
> > > > Refinish King
> > > >
> > > >
> > > > "HLS" <Sorry@nospam> wrote in message
> > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > >
> > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
> in
> > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > If they did that:
> > > > > >
> > > > > > They're asking for a crack to happen. Read the manual, for every
> > > crank,
> > > > > > there is a specified fillet radius!
> > > > > >
> > > > > > Refinish King
> > > > >
> > > > > A radiused fillet is less likely to crack than a sharply ground
one,
> > re
> > > > the
> > > > > stress raiser
> > > > > phenomenon we have discussed before.. I think that more often
than
> > not,
> > > > the
> > > > > fillet
> > > > > is not intented to be left overly large...it is probably a result
of
> > > less
> > > > > than precise machining.
> > > > >
> > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > >
> > > > > I never heard of anyone using narrower bearings, but they do
> 'relieve'
> > > the
> > > > > edge of the
> > > > > bearing where it might contact the fillet.
> > > > >
> > > > > Seems I have seen a special tool to do this, but don't have one
> > myself.
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
>
>
04-05-2004, 12:48 PM
#36
Guest
Posts: n/a
Re: how "tight" should the crankshaft be with new bearings?
APRA Crankshaft specifications and tolerances!
Racing engine shops use different tollerances, I've been there!
Refinish King
"c" <c@me.org> wrote in message
news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> Do you want me to use the book that I used for the 4 years that I worked
in
> a racing engine shop, or do you have a specific one in mind?
>
> Chris
>
>
> "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > That's on new:
> >
> > not a regrind.
> >
> > So like I said, go look in the book that crankshaft grinders use. You'll
> be
> > surprised, and more surprised at what they use for gauges to check the
> > stones when they dress them.
> >
> > Refinish King
> >
> >
> > "c" <c@me.org> wrote in message
> > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > I guess Lunati and all of the other aftermarket crank manufacturers
have
> > > been doing it wrong all these years.
> > >
> > >
http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > >
> > > It is common knowledge that a radius reduces the chance for a stress
> crack
> > > by ditributing the stresses evenly across the radius. The bigger the
> > radius,
> > > the more area to absorbs stresses.
> > >
> > > Chris
> > >
> > >
> > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > It's called a bearing knife or bearing scraper:
> > > >
> > > > But, if you have an excessively large fillet radius, especially in a
> > cast
> > > > iron crankshaft. that is the perfect place for a radial crack to
> begin.
> > > >
> > > > The fillet radius should be ground with the stone dressed to the
> propper
> > > > radius for the crankshaft in the machine.
> > > >
> > > > Refinish King
> > > >
> > > >
> > > > "HLS" <Sorry@nospam> wrote in message
> > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > >
> > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
> in
> > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > If they did that:
> > > > > >
> > > > > > They're asking for a crack to happen. Read the manual, for every
> > > crank,
> > > > > > there is a specified fillet radius!
> > > > > >
> > > > > > Refinish King
> > > > >
> > > > > A radiused fillet is less likely to crack than a sharply ground
one,
> > re
> > > > the
> > > > > stress raiser
> > > > > phenomenon we have discussed before.. I think that more often
than
> > not,
> > > > the
> > > > > fillet
> > > > > is not intented to be left overly large...it is probably a result
of
> > > less
> > > > > than precise machining.
> > > > >
> > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > >
> > > > > I never heard of anyone using narrower bearings, but they do
> 'relieve'
> > > the
> > > > > edge of the
> > > > > bearing where it might contact the fillet.
> > > > >
> > > > > Seems I have seen a special tool to do this, but don't have one
> > myself.
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
>
>
Racing engine shops use different tollerances, I've been there!
Refinish King
"c" <c@me.org> wrote in message
news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> Do you want me to use the book that I used for the 4 years that I worked
in
> a racing engine shop, or do you have a specific one in mind?
>
> Chris
>
>
> "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > That's on new:
> >
> > not a regrind.
> >
> > So like I said, go look in the book that crankshaft grinders use. You'll
> be
> > surprised, and more surprised at what they use for gauges to check the
> > stones when they dress them.
> >
> > Refinish King
> >
> >
> > "c" <c@me.org> wrote in message
> > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > I guess Lunati and all of the other aftermarket crank manufacturers
have
> > > been doing it wrong all these years.
> > >
> > >
http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > >
> > > It is common knowledge that a radius reduces the chance for a stress
> crack
> > > by ditributing the stresses evenly across the radius. The bigger the
> > radius,
> > > the more area to absorbs stresses.
> > >
> > > Chris
> > >
> > >
> > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > It's called a bearing knife or bearing scraper:
> > > >
> > > > But, if you have an excessively large fillet radius, especially in a
> > cast
> > > > iron crankshaft. that is the perfect place for a radial crack to
> begin.
> > > >
> > > > The fillet radius should be ground with the stone dressed to the
> propper
> > > > radius for the crankshaft in the machine.
> > > >
> > > > Refinish King
> > > >
> > > >
> > > > "HLS" <Sorry@nospam> wrote in message
> > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > >
> > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
> in
> > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > If they did that:
> > > > > >
> > > > > > They're asking for a crack to happen. Read the manual, for every
> > > crank,
> > > > > > there is a specified fillet radius!
> > > > > >
> > > > > > Refinish King
> > > > >
> > > > > A radiused fillet is less likely to crack than a sharply ground
one,
> > re
> > > > the
> > > > > stress raiser
> > > > > phenomenon we have discussed before.. I think that more often
than
> > not,
> > > > the
> > > > > fillet
> > > > > is not intented to be left overly large...it is probably a result
of
> > > less
> > > > > than precise machining.
> > > > >
> > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > >
> > > > > I never heard of anyone using narrower bearings, but they do
> 'relieve'
> > > the
> > > > > edge of the
> > > > > bearing where it might contact the fillet.
> > > > >
> > > > > Seems I have seen a special tool to do this, but don't have one
> > myself.
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
>
>
04-05-2004, 12:48 PM
#37
Guest
Posts: n/a
Re: how "tight" should the crankshaft be with new bearings?
APRA Crankshaft specifications and tolerances!
Racing engine shops use different tollerances, I've been there!
Refinish King
"c" <c@me.org> wrote in message
news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> Do you want me to use the book that I used for the 4 years that I worked
in
> a racing engine shop, or do you have a specific one in mind?
>
> Chris
>
>
> "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > That's on new:
> >
> > not a regrind.
> >
> > So like I said, go look in the book that crankshaft grinders use. You'll
> be
> > surprised, and more surprised at what they use for gauges to check the
> > stones when they dress them.
> >
> > Refinish King
> >
> >
> > "c" <c@me.org> wrote in message
> > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > I guess Lunati and all of the other aftermarket crank manufacturers
have
> > > been doing it wrong all these years.
> > >
> > >
http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > >
> > > It is common knowledge that a radius reduces the chance for a stress
> crack
> > > by ditributing the stresses evenly across the radius. The bigger the
> > radius,
> > > the more area to absorbs stresses.
> > >
> > > Chris
> > >
> > >
> > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > It's called a bearing knife or bearing scraper:
> > > >
> > > > But, if you have an excessively large fillet radius, especially in a
> > cast
> > > > iron crankshaft. that is the perfect place for a radial crack to
> begin.
> > > >
> > > > The fillet radius should be ground with the stone dressed to the
> propper
> > > > radius for the crankshaft in the machine.
> > > >
> > > > Refinish King
> > > >
> > > >
> > > > "HLS" <Sorry@nospam> wrote in message
> > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > >
> > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
> in
> > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > If they did that:
> > > > > >
> > > > > > They're asking for a crack to happen. Read the manual, for every
> > > crank,
> > > > > > there is a specified fillet radius!
> > > > > >
> > > > > > Refinish King
> > > > >
> > > > > A radiused fillet is less likely to crack than a sharply ground
one,
> > re
> > > > the
> > > > > stress raiser
> > > > > phenomenon we have discussed before.. I think that more often
than
> > not,
> > > > the
> > > > > fillet
> > > > > is not intented to be left overly large...it is probably a result
of
> > > less
> > > > > than precise machining.
> > > > >
> > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > >
> > > > > I never heard of anyone using narrower bearings, but they do
> 'relieve'
> > > the
> > > > > edge of the
> > > > > bearing where it might contact the fillet.
> > > > >
> > > > > Seems I have seen a special tool to do this, but don't have one
> > myself.
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
>
>
Racing engine shops use different tollerances, I've been there!
Refinish King
"c" <c@me.org> wrote in message
news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> Do you want me to use the book that I used for the 4 years that I worked
in
> a racing engine shop, or do you have a specific one in mind?
>
> Chris
>
>
> "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > That's on new:
> >
> > not a regrind.
> >
> > So like I said, go look in the book that crankshaft grinders use. You'll
> be
> > surprised, and more surprised at what they use for gauges to check the
> > stones when they dress them.
> >
> > Refinish King
> >
> >
> > "c" <c@me.org> wrote in message
> > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > I guess Lunati and all of the other aftermarket crank manufacturers
have
> > > been doing it wrong all these years.
> > >
> > >
http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > >
> > > It is common knowledge that a radius reduces the chance for a stress
> crack
> > > by ditributing the stresses evenly across the radius. The bigger the
> > radius,
> > > the more area to absorbs stresses.
> > >
> > > Chris
> > >
> > >
> > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > It's called a bearing knife or bearing scraper:
> > > >
> > > > But, if you have an excessively large fillet radius, especially in a
> > cast
> > > > iron crankshaft. that is the perfect place for a radial crack to
> begin.
> > > >
> > > > The fillet radius should be ground with the stone dressed to the
> propper
> > > > radius for the crankshaft in the machine.
> > > >
> > > > Refinish King
> > > >
> > > >
> > > > "HLS" <Sorry@nospam> wrote in message
> > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > >
> > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
> in
> > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > If they did that:
> > > > > >
> > > > > > They're asking for a crack to happen. Read the manual, for every
> > > crank,
> > > > > > there is a specified fillet radius!
> > > > > >
> > > > > > Refinish King
> > > > >
> > > > > A radiused fillet is less likely to crack than a sharply ground
one,
> > re
> > > > the
> > > > > stress raiser
> > > > > phenomenon we have discussed before.. I think that more often
than
> > not,
> > > > the
> > > > > fillet
> > > > > is not intented to be left overly large...it is probably a result
of
> > > less
> > > > > than precise machining.
> > > > >
> > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > >
> > > > > I never heard of anyone using narrower bearings, but they do
> 'relieve'
> > > the
> > > > > edge of the
> > > > > bearing where it might contact the fillet.
> > > > >
> > > > > Seems I have seen a special tool to do this, but don't have one
> > myself.
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
>
>
04-05-2004, 10:22 PM
#38
Guest
Posts: n/a
Re: how "tight" should the crankshaft be with new bearings?
Yeah they do, but you are dead wrong as to why they do it. It has nothing to
do with a small fillet increasing strength, it has to do with providing
clearance for the sides of the bearings. It is common sense (maybe this is
why you don't get it?) that a larger fillet increases strength. 'nuff said.
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:Y3gcc.5641$Em4.3205@fe03.usenetserver.com...
> APRA Crankshaft specifications and tolerances!
>
> Racing engine shops use different tollerances, I've been there!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> > Do you want me to use the book that I used for the 4 years that I worked
> in
> > a racing engine shop, or do you have a specific one in mind?
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > > That's on new:
> > >
> > > not a regrind.
> > >
> > > So like I said, go look in the book that crankshaft grinders use.
You'll
> > be
> > > surprised, and more surprised at what they use for gauges to check the
> > > stones when they dress them.
> > >
> > > Refinish King
> > >
> > >
> > > "c" <c@me.org> wrote in message
> > > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > > I guess Lunati and all of the other aftermarket crank manufacturers
> have
> > > > been doing it wrong all these years.
> > > >
> > > >
> http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > > >
> > > > It is common knowledge that a radius reduces the chance for a stress
> > crack
> > > > by ditributing the stresses evenly across the radius. The bigger the
> > > radius,
> > > > the more area to absorbs stresses.
> > > >
> > > > Chris
> > > >
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > > It's called a bearing knife or bearing scraper:
> > > > >
> > > > > But, if you have an excessively large fillet radius, especially in
a
> > > cast
> > > > > iron crankshaft. that is the perfect place for a radial crack to
> > begin.
> > > > >
> > > > > The fillet radius should be ground with the stone dressed to the
> > propper
> > > > > radius for the crankshaft in the machine.
> > > > >
> > > > > Refinish King
> > > > >
> > > > >
> > > > > "HLS" <Sorry@nospam> wrote in message
> > > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > > >
> > > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com>
wrote
> > in
> > > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > > If they did that:
> > > > > > >
> > > > > > > They're asking for a crack to happen. Read the manual, for
every
> > > > crank,
> > > > > > > there is a specified fillet radius!
> > > > > > >
> > > > > > > Refinish King
> > > > > >
> > > > > > A radiused fillet is less likely to crack than a sharply ground
> one,
> > > re
> > > > > the
> > > > > > stress raiser
> > > > > > phenomenon we have discussed before.. I think that more often
> than
> > > not,
> > > > > the
> > > > > > fillet
> > > > > > is not intented to be left overly large...it is probably a
result
> of
> > > > less
> > > > > > than precise machining.
> > > > > >
> > > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > > >
> > > > > > I never heard of anyone using narrower bearings, but they do
> > 'relieve'
> > > > the
> > > > > > edge of the
> > > > > > bearing where it might contact the fillet.
> > > > > >
> > > > > > Seems I have seen a special tool to do this, but don't have one
> > > myself.
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>
do with a small fillet increasing strength, it has to do with providing
clearance for the sides of the bearings. It is common sense (maybe this is
why you don't get it?) that a larger fillet increases strength. 'nuff said.
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:Y3gcc.5641$Em4.3205@fe03.usenetserver.com...
> APRA Crankshaft specifications and tolerances!
>
> Racing engine shops use different tollerances, I've been there!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> > Do you want me to use the book that I used for the 4 years that I worked
> in
> > a racing engine shop, or do you have a specific one in mind?
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > > That's on new:
> > >
> > > not a regrind.
> > >
> > > So like I said, go look in the book that crankshaft grinders use.
You'll
> > be
> > > surprised, and more surprised at what they use for gauges to check the
> > > stones when they dress them.
> > >
> > > Refinish King
> > >
> > >
> > > "c" <c@me.org> wrote in message
> > > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > > I guess Lunati and all of the other aftermarket crank manufacturers
> have
> > > > been doing it wrong all these years.
> > > >
> > > >
> http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > > >
> > > > It is common knowledge that a radius reduces the chance for a stress
> > crack
> > > > by ditributing the stresses evenly across the radius. The bigger the
> > > radius,
> > > > the more area to absorbs stresses.
> > > >
> > > > Chris
> > > >
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > > It's called a bearing knife or bearing scraper:
> > > > >
> > > > > But, if you have an excessively large fillet radius, especially in
a
> > > cast
> > > > > iron crankshaft. that is the perfect place for a radial crack to
> > begin.
> > > > >
> > > > > The fillet radius should be ground with the stone dressed to the
> > propper
> > > > > radius for the crankshaft in the machine.
> > > > >
> > > > > Refinish King
> > > > >
> > > > >
> > > > > "HLS" <Sorry@nospam> wrote in message
> > > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > > >
> > > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com>
wrote
> > in
> > > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > > If they did that:
> > > > > > >
> > > > > > > They're asking for a crack to happen. Read the manual, for
every
> > > > crank,
> > > > > > > there is a specified fillet radius!
> > > > > > >
> > > > > > > Refinish King
> > > > > >
> > > > > > A radiused fillet is less likely to crack than a sharply ground
> one,
> > > re
> > > > > the
> > > > > > stress raiser
> > > > > > phenomenon we have discussed before.. I think that more often
> than
> > > not,
> > > > > the
> > > > > > fillet
> > > > > > is not intented to be left overly large...it is probably a
result
> of
> > > > less
> > > > > > than precise machining.
> > > > > >
> > > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > > >
> > > > > > I never heard of anyone using narrower bearings, but they do
> > 'relieve'
> > > > the
> > > > > > edge of the
> > > > > > bearing where it might contact the fillet.
> > > > > >
> > > > > > Seems I have seen a special tool to do this, but don't have one
> > > myself.
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>
04-05-2004, 10:22 PM
#39
Guest
Posts: n/a
Re: how "tight" should the crankshaft be with new bearings?
Yeah they do, but you are dead wrong as to why they do it. It has nothing to
do with a small fillet increasing strength, it has to do with providing
clearance for the sides of the bearings. It is common sense (maybe this is
why you don't get it?) that a larger fillet increases strength. 'nuff said.
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:Y3gcc.5641$Em4.3205@fe03.usenetserver.com...
> APRA Crankshaft specifications and tolerances!
>
> Racing engine shops use different tollerances, I've been there!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> > Do you want me to use the book that I used for the 4 years that I worked
> in
> > a racing engine shop, or do you have a specific one in mind?
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > > That's on new:
> > >
> > > not a regrind.
> > >
> > > So like I said, go look in the book that crankshaft grinders use.
You'll
> > be
> > > surprised, and more surprised at what they use for gauges to check the
> > > stones when they dress them.
> > >
> > > Refinish King
> > >
> > >
> > > "c" <c@me.org> wrote in message
> > > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > > I guess Lunati and all of the other aftermarket crank manufacturers
> have
> > > > been doing it wrong all these years.
> > > >
> > > >
> http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > > >
> > > > It is common knowledge that a radius reduces the chance for a stress
> > crack
> > > > by ditributing the stresses evenly across the radius. The bigger the
> > > radius,
> > > > the more area to absorbs stresses.
> > > >
> > > > Chris
> > > >
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > > It's called a bearing knife or bearing scraper:
> > > > >
> > > > > But, if you have an excessively large fillet radius, especially in
a
> > > cast
> > > > > iron crankshaft. that is the perfect place for a radial crack to
> > begin.
> > > > >
> > > > > The fillet radius should be ground with the stone dressed to the
> > propper
> > > > > radius for the crankshaft in the machine.
> > > > >
> > > > > Refinish King
> > > > >
> > > > >
> > > > > "HLS" <Sorry@nospam> wrote in message
> > > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > > >
> > > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com>
wrote
> > in
> > > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > > If they did that:
> > > > > > >
> > > > > > > They're asking for a crack to happen. Read the manual, for
every
> > > > crank,
> > > > > > > there is a specified fillet radius!
> > > > > > >
> > > > > > > Refinish King
> > > > > >
> > > > > > A radiused fillet is less likely to crack than a sharply ground
> one,
> > > re
> > > > > the
> > > > > > stress raiser
> > > > > > phenomenon we have discussed before.. I think that more often
> than
> > > not,
> > > > > the
> > > > > > fillet
> > > > > > is not intented to be left overly large...it is probably a
result
> of
> > > > less
> > > > > > than precise machining.
> > > > > >
> > > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > > >
> > > > > > I never heard of anyone using narrower bearings, but they do
> > 'relieve'
> > > > the
> > > > > > edge of the
> > > > > > bearing where it might contact the fillet.
> > > > > >
> > > > > > Seems I have seen a special tool to do this, but don't have one
> > > myself.
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>
do with a small fillet increasing strength, it has to do with providing
clearance for the sides of the bearings. It is common sense (maybe this is
why you don't get it?) that a larger fillet increases strength. 'nuff said.
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:Y3gcc.5641$Em4.3205@fe03.usenetserver.com...
> APRA Crankshaft specifications and tolerances!
>
> Racing engine shops use different tollerances, I've been there!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> > Do you want me to use the book that I used for the 4 years that I worked
> in
> > a racing engine shop, or do you have a specific one in mind?
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > > That's on new:
> > >
> > > not a regrind.
> > >
> > > So like I said, go look in the book that crankshaft grinders use.
You'll
> > be
> > > surprised, and more surprised at what they use for gauges to check the
> > > stones when they dress them.
> > >
> > > Refinish King
> > >
> > >
> > > "c" <c@me.org> wrote in message
> > > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > > I guess Lunati and all of the other aftermarket crank manufacturers
> have
> > > > been doing it wrong all these years.
> > > >
> > > >
> http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > > >
> > > > It is common knowledge that a radius reduces the chance for a stress
> > crack
> > > > by ditributing the stresses evenly across the radius. The bigger the
> > > radius,
> > > > the more area to absorbs stresses.
> > > >
> > > > Chris
> > > >
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > > It's called a bearing knife or bearing scraper:
> > > > >
> > > > > But, if you have an excessively large fillet radius, especially in
a
> > > cast
> > > > > iron crankshaft. that is the perfect place for a radial crack to
> > begin.
> > > > >
> > > > > The fillet radius should be ground with the stone dressed to the
> > propper
> > > > > radius for the crankshaft in the machine.
> > > > >
> > > > > Refinish King
> > > > >
> > > > >
> > > > > "HLS" <Sorry@nospam> wrote in message
> > > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > > >
> > > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com>
wrote
> > in
> > > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > > If they did that:
> > > > > > >
> > > > > > > They're asking for a crack to happen. Read the manual, for
every
> > > > crank,
> > > > > > > there is a specified fillet radius!
> > > > > > >
> > > > > > > Refinish King
> > > > > >
> > > > > > A radiused fillet is less likely to crack than a sharply ground
> one,
> > > re
> > > > > the
> > > > > > stress raiser
> > > > > > phenomenon we have discussed before.. I think that more often
> than
> > > not,
> > > > > the
> > > > > > fillet
> > > > > > is not intented to be left overly large...it is probably a
result
> of
> > > > less
> > > > > > than precise machining.
> > > > > >
> > > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > > >
> > > > > > I never heard of anyone using narrower bearings, but they do
> > 'relieve'
> > > > the
> > > > > > edge of the
> > > > > > bearing where it might contact the fillet.
> > > > > >
> > > > > > Seems I have seen a special tool to do this, but don't have one
> > > myself.
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>
04-05-2004, 10:22 PM
#40
Guest
Posts: n/a
Re: how "tight" should the crankshaft be with new bearings?
Yeah they do, but you are dead wrong as to why they do it. It has nothing to
do with a small fillet increasing strength, it has to do with providing
clearance for the sides of the bearings. It is common sense (maybe this is
why you don't get it?) that a larger fillet increases strength. 'nuff said.
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:Y3gcc.5641$Em4.3205@fe03.usenetserver.com...
> APRA Crankshaft specifications and tolerances!
>
> Racing engine shops use different tollerances, I've been there!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> > Do you want me to use the book that I used for the 4 years that I worked
> in
> > a racing engine shop, or do you have a specific one in mind?
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > > That's on new:
> > >
> > > not a regrind.
> > >
> > > So like I said, go look in the book that crankshaft grinders use.
You'll
> > be
> > > surprised, and more surprised at what they use for gauges to check the
> > > stones when they dress them.
> > >
> > > Refinish King
> > >
> > >
> > > "c" <c@me.org> wrote in message
> > > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > > I guess Lunati and all of the other aftermarket crank manufacturers
> have
> > > > been doing it wrong all these years.
> > > >
> > > >
> http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > > >
> > > > It is common knowledge that a radius reduces the chance for a stress
> > crack
> > > > by ditributing the stresses evenly across the radius. The bigger the
> > > radius,
> > > > the more area to absorbs stresses.
> > > >
> > > > Chris
> > > >
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > > It's called a bearing knife or bearing scraper:
> > > > >
> > > > > But, if you have an excessively large fillet radius, especially in
a
> > > cast
> > > > > iron crankshaft. that is the perfect place for a radial crack to
> > begin.
> > > > >
> > > > > The fillet radius should be ground with the stone dressed to the
> > propper
> > > > > radius for the crankshaft in the machine.
> > > > >
> > > > > Refinish King
> > > > >
> > > > >
> > > > > "HLS" <Sorry@nospam> wrote in message
> > > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > > >
> > > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com>
wrote
> > in
> > > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > > If they did that:
> > > > > > >
> > > > > > > They're asking for a crack to happen. Read the manual, for
every
> > > > crank,
> > > > > > > there is a specified fillet radius!
> > > > > > >
> > > > > > > Refinish King
> > > > > >
> > > > > > A radiused fillet is less likely to crack than a sharply ground
> one,
> > > re
> > > > > the
> > > > > > stress raiser
> > > > > > phenomenon we have discussed before.. I think that more often
> than
> > > not,
> > > > > the
> > > > > > fillet
> > > > > > is not intented to be left overly large...it is probably a
result
> of
> > > > less
> > > > > > than precise machining.
> > > > > >
> > > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > > >
> > > > > > I never heard of anyone using narrower bearings, but they do
> > 'relieve'
> > > > the
> > > > > > edge of the
> > > > > > bearing where it might contact the fillet.
> > > > > >
> > > > > > Seems I have seen a special tool to do this, but don't have one
> > > myself.
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>
do with a small fillet increasing strength, it has to do with providing
clearance for the sides of the bearings. It is common sense (maybe this is
why you don't get it?) that a larger fillet increases strength. 'nuff said.
Chris
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:Y3gcc.5641$Em4.3205@fe03.usenetserver.com...
> APRA Crankshaft specifications and tolerances!
>
> Racing engine shops use different tollerances, I've been there!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:lr6cc.13450$YC5.4462@twister.rdc-kc.rr.com...
> > Do you want me to use the book that I used for the 4 years that I worked
> in
> > a racing engine shop, or do you have a specific one in mind?
> >
> > Chris
> >
> >
> > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
> > message news:ak5cc.4342$Em4.4043@fe03.usenetserver.com...
> > > That's on new:
> > >
> > > not a regrind.
> > >
> > > So like I said, go look in the book that crankshaft grinders use.
You'll
> > be
> > > surprised, and more surprised at what they use for gauges to check the
> > > stones when they dress them.
> > >
> > > Refinish King
> > >
> > >
> > > "c" <c@me.org> wrote in message
> > > news:T%4cc.13442$YC5.10261@twister.rdc-kc.rr.com...
> > > > I guess Lunati and all of the other aftermarket crank manufacturers
> have
> > > > been doing it wrong all these years.
> > > >
> > > >
> http://www.holley.com/HiOctn/ProdLin...CSGenInfo.html
> > > >
> > > > It is common knowledge that a radius reduces the chance for a stress
> > crack
> > > > by ditributing the stresses evenly across the radius. The bigger the
> > > radius,
> > > > the more area to absorbs stresses.
> > > >
> > > > Chris
> > > >
> > > >
> > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote
in
> > > > message news:SK4cc.4262$Em4.2316@fe03.usenetserver.com...
> > > > > It's called a bearing knife or bearing scraper:
> > > > >
> > > > > But, if you have an excessively large fillet radius, especially in
a
> > > cast
> > > > > iron crankshaft. that is the perfect place for a radial crack to
> > begin.
> > > > >
> > > > > The fillet radius should be ground with the stone dressed to the
> > propper
> > > > > radius for the crankshaft in the machine.
> > > > >
> > > > > Refinish King
> > > > >
> > > > >
> > > > > "HLS" <Sorry@nospam> wrote in message
> > > > > news:10719qskrk8ad4f@corp.supernews.com...
> > > > > >
> > > > > > "Refinish King" <noneofyourbusiness@neveryoumind.nospam.com>
wrote
> > in
> > > > > > message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> > > > > > > If they did that:
> > > > > > >
> > > > > > > They're asking for a crack to happen. Read the manual, for
every
> > > > crank,
> > > > > > > there is a specified fillet radius!
> > > > > > >
> > > > > > > Refinish King
> > > > > >
> > > > > > A radiused fillet is less likely to crack than a sharply ground
> one,
> > > re
> > > > > the
> > > > > > stress raiser
> > > > > > phenomenon we have discussed before.. I think that more often
> than
> > > not,
> > > > > the
> > > > > > fillet
> > > > > > is not intented to be left overly large...it is probably a
result
> of
> > > > less
> > > > > > than precise machining.
> > > > > >
> > > > > > It can interfere with the edge of the bearing, just as "c" said.
> > > > > >
> > > > > > I never heard of anyone using narrower bearings, but they do
> > 'relieve'
> > > > the
> > > > > > edge of the
> > > > > > bearing where it might contact the fillet.
> > > > > >
> > > > > > Seems I have seen a special tool to do this, but don't have one
> > > myself.
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>