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

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


"c" <c@me.org> wrote in message
news:3BGac.17220$z%1.12870@twister.rdc-kc.rr.com...
>
> "TranSurgeon" <nobulltrans@mchsi.com> wrote in message
> news:l4Eac.147026$1p.1870509@attbi_s54...
> > good rule of thumb is you should be able to hook your little finger over
> one
> > of the counterweights and turn it easily, a really good one will go for
a
> > half-turn or more with a flick of the pinky
> >
> >
>
> One other thing I just thought about on this one. Some crankshaft grinding
> shops leave a large fillet radius where the edge of the journal meets the
> counterweight. This is commonly done for cranks intended for hi
performance
> or racing applications. Depending on the engine, this may require narrowed
> bearing inserts. It is not usually an issue on the mains, but it is
> something you might want to check out.
>
> Chris
>
>

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

Your manual isn't worth ---- when you start talking high performance or race
applications.
Bob
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> If they did that:
>
> They're asking for a crack to happen. Read the manual, for every crank,
> there is a specified fillet radius!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:3BGac.17220$z%1.12870@twister.rdc-kc.rr.com...
> >
> > "TranSurgeon" <nobulltrans@mchsi.com> wrote in message
> > news:l4Eac.147026$1p.1870509@attbi_s54...
> > > good rule of thumb is you should be able to hook your little finger
over
> > one
> > > of the counterweights and turn it easily, a really good one will go
for
> a
> > > half-turn or more with a flick of the pinky
> > >
> > >
> >
> > One other thing I just thought about on this one. Some crankshaft
grinding
> > shops leave a large fillet radius where the edge of the journal meets
the
> > counterweight. This is commonly done for cranks intended for hi
> performance
> > or racing applications. Depending on the engine, this may require
narrowed
> > bearing inserts. It is not usually an issue on the mains, but it is
> > something you might want to check out.
> >
> > Chris
> >
> >
>
>
>

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

Your manual isn't worth ---- when you start talking high performance or race
applications.
Bob
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> If they did that:
>
> They're asking for a crack to happen. Read the manual, for every crank,
> there is a specified fillet radius!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:3BGac.17220$z%1.12870@twister.rdc-kc.rr.com...
> >
> > "TranSurgeon" <nobulltrans@mchsi.com> wrote in message
> > news:l4Eac.147026$1p.1870509@attbi_s54...
> > > good rule of thumb is you should be able to hook your little finger
over
> > one
> > > of the counterweights and turn it easily, a really good one will go
for
> a
> > > half-turn or more with a flick of the pinky
> > >
> > >
> >
> > One other thing I just thought about on this one. Some crankshaft
grinding
> > shops leave a large fillet radius where the edge of the journal meets
the
> > counterweight. This is commonly done for cranks intended for hi
> performance
> > or racing applications. Depending on the engine, this may require
narrowed
> > bearing inserts. It is not usually an issue on the mains, but it is
> > something you might want to check out.
> >
> > Chris
> >
> >
>
>
>

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

Your manual isn't worth ---- when you start talking high performance or race
applications.
Bob
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> If they did that:
>
> They're asking for a crack to happen. Read the manual, for every crank,
> there is a specified fillet radius!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:3BGac.17220$z%1.12870@twister.rdc-kc.rr.com...
> >
> > "TranSurgeon" <nobulltrans@mchsi.com> wrote in message
> > news:l4Eac.147026$1p.1870509@attbi_s54...
> > > good rule of thumb is you should be able to hook your little finger
over
> > one
> > > of the counterweights and turn it easily, a really good one will go
for
> a
> > > half-turn or more with a flick of the pinky
> > >
> > >
> >
> > One other thing I just thought about on this one. Some crankshaft
grinding
> > shops leave a large fillet radius where the edge of the journal meets
the
> > counterweight. This is commonly done for cranks intended for hi
> performance
> > or racing applications. Depending on the engine, this may require
narrowed
> > bearing inserts. It is not usually an issue on the mains, but it is
> > something you might want to check out.
> >
> > Chris
> >
> >
>
>
>

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

Your manual isn't worth ---- when you start talking high performance or race
applications.
Bob
"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> If they did that:
>
> They're asking for a crack to happen. Read the manual, for every crank,
> there is a specified fillet radius!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:3BGac.17220$z%1.12870@twister.rdc-kc.rr.com...
> >
> > "TranSurgeon" <nobulltrans@mchsi.com> wrote in message
> > news:l4Eac.147026$1p.1870509@attbi_s54...
> > > good rule of thumb is you should be able to hook your little finger
over
> > one
> > > of the counterweights and turn it easily, a really good one will go
for
> a
> > > half-turn or more with a flick of the pinky
> > >
> > >
> >
> > One other thing I just thought about on this one. Some crankshaft
grinding
> > shops leave a large fillet radius where the edge of the journal meets
the
> > counterweight. This is commonly done for cranks intended for hi
> performance
> > or racing applications. Depending on the engine, this may require
narrowed
> > bearing inserts. It is not usually an issue on the mains, but it is
> > something you might want to check out.
> >
> > Chris
> >
> >
>
>
>

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

We get cranks ground .010 under in order to get a bigger fillet radius all
the time, for formula ford cranks. Very common. I have no idea what the
new radius, I just ask John at Canada Chrome to do it and he does it. he's
been grinding cranks probably longer than I've been alive.

Brian


"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> If they did that:
>
> They're asking for a crack to happen. Read the manual, for every crank,
> there is a specified fillet radius!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:3BGac.17220$z%1.12870@twister.rdc-kc.rr.com...
> >
> > "TranSurgeon" <nobulltrans@mchsi.com> wrote in message
> > news:l4Eac.147026$1p.1870509@attbi_s54...
> > > good rule of thumb is you should be able to hook your little finger
over
> > one
> > > of the counterweights and turn it easily, a really good one will go
for
> a
> > > half-turn or more with a flick of the pinky
> > >
> > >
> >
> > One other thing I just thought about on this one. Some crankshaft
grinding
> > shops leave a large fillet radius where the edge of the journal meets
the
> > counterweight. This is commonly done for cranks intended for hi
> performance
> > or racing applications. Depending on the engine, this may require
narrowed
> > bearing inserts. It is not usually an issue on the mains, but it is
> > something you might want to check out.
> >
> > Chris
> >
> >
>
>
>

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

We get cranks ground .010 under in order to get a bigger fillet radius all
the time, for formula ford cranks. Very common. I have no idea what the
new radius, I just ask John at Canada Chrome to do it and he does it. he's
been grinding cranks probably longer than I've been alive.

Brian


"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> If they did that:
>
> They're asking for a crack to happen. Read the manual, for every crank,
> there is a specified fillet radius!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:3BGac.17220$z%1.12870@twister.rdc-kc.rr.com...
> >
> > "TranSurgeon" <nobulltrans@mchsi.com> wrote in message
> > news:l4Eac.147026$1p.1870509@attbi_s54...
> > > good rule of thumb is you should be able to hook your little finger
over
> > one
> > > of the counterweights and turn it easily, a really good one will go
for
> a
> > > half-turn or more with a flick of the pinky
> > >
> > >
> >
> > One other thing I just thought about on this one. Some crankshaft
grinding
> > shops leave a large fillet radius where the edge of the journal meets
the
> > counterweight. This is commonly done for cranks intended for hi
> performance
> > or racing applications. Depending on the engine, this may require
narrowed
> > bearing inserts. It is not usually an issue on the mains, but it is
> > something you might want to check out.
> >
> > Chris
> >
> >
>
>
>

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

We get cranks ground .010 under in order to get a bigger fillet radius all
the time, for formula ford cranks. Very common. I have no idea what the
new radius, I just ask John at Canada Chrome to do it and he does it. he's
been grinding cranks probably longer than I've been alive.

Brian


"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> If they did that:
>
> They're asking for a crack to happen. Read the manual, for every crank,
> there is a specified fillet radius!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:3BGac.17220$z%1.12870@twister.rdc-kc.rr.com...
> >
> > "TranSurgeon" <nobulltrans@mchsi.com> wrote in message
> > news:l4Eac.147026$1p.1870509@attbi_s54...
> > > good rule of thumb is you should be able to hook your little finger
over
> > one
> > > of the counterweights and turn it easily, a really good one will go
for
> a
> > > half-turn or more with a flick of the pinky
> > >
> > >
> >
> > One other thing I just thought about on this one. Some crankshaft
grinding
> > shops leave a large fillet radius where the edge of the journal meets
the
> > counterweight. This is commonly done for cranks intended for hi
> performance
> > or racing applications. Depending on the engine, this may require
narrowed
> > bearing inserts. It is not usually an issue on the mains, but it is
> > something you might want to check out.
> >
> > Chris
> >
> >
>
>
>

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

We get cranks ground .010 under in order to get a bigger fillet radius all
the time, for formula ford cranks. Very common. I have no idea what the
new radius, I just ask John at Canada Chrome to do it and he does it. he's
been grinding cranks probably longer than I've been alive.

Brian


"Refinish King" <noneofyourbusiness@neveryoumind.nospam.com> wrote in
message news:%zNac.8164$Hs1.2774@fe03.usenetserver.com...
> If they did that:
>
> They're asking for a crack to happen. Read the manual, for every crank,
> there is a specified fillet radius!
>
> Refinish King
>
>
> "c" <c@me.org> wrote in message
> news:3BGac.17220$z%1.12870@twister.rdc-kc.rr.com...
> >
> > "TranSurgeon" <nobulltrans@mchsi.com> wrote in message
> > news:l4Eac.147026$1p.1870509@attbi_s54...
> > > good rule of thumb is you should be able to hook your little finger
over
> > one
> > > of the counterweights and turn it easily, a really good one will go
for
> a
> > > half-turn or more with a flick of the pinky
> > >
> > >
> >
> > One other thing I just thought about on this one. Some crankshaft
grinding
> > shops leave a large fillet radius where the edge of the journal meets
the
> > counterweight. This is commonly done for cranks intended for hi
> performance
> > or racing applications. Depending on the engine, this may require
narrowed
> > bearing inserts. It is not usually an issue on the mains, but it is
> > something you might want to check out.
> >
> > Chris
> >
> >
>
>
>

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

"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.