Re: how "tight" should the crankshaft be with new bearings?
 

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.
> >
> >
>
>
>

Re: how "tight" should the crankshaft be with new bearings?
 

"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
>
"The King" has never let facts get in his way. He just babbles on whether he
knows what he's talking about or not.
Bob

Re: how "tight" should the crankshaft be with new bearings?
 

"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
>
"The King" has never let facts get in his way. He just babbles on whether he
knows what he's talking about or not.
Bob

Re: how "tight" should the crankshaft be with new bearings?
 

"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
>
"The King" has never let facts get in his way. He just babbles on whether he
knows what he's talking about or not.
Bob

Re: how "tight" should the crankshaft be with new bearings?
 

"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
>
"The King" has never let facts get in his way. He just babbles on whether he
knows what he's talking about or not.
Bob

Re: how "tight" should the crankshaft be with new bearings?
 

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.
> > >
> > >
> >
> >
> >
>
>

Re: how "tight" should the crankshaft be with new bearings?
 

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.
> > >
> > >
> >
> >
> >
>
>

Re: how "tight" should the crankshaft be with new bearings?
 

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.
> > >
> > >
> >
> >
> >
>
>

Re: how "tight" should the crankshaft be with new bearings?
 

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.
> > >
> > >
> >
> >
> >
>
>

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.
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>