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

This is the world according to C:

news group. He wanted his point known, disregarding the original post saying
he required narrower bearings. But, there would have to have been some
submerge arc welding on that crank to make the fillet narrower?

Grinding makes the fillet area wider, does it not?

Refinish King


"Del Rawlins" <del@_kills_spammers_rawlinsbrothers.org> wrote in message
news:20040405204257046-0800@enews.newsguy.com...
> In <jvocc.45753$z%1.23192@twister.rdc-kc.rr.com> c wrote:
> > 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.
>
> The fillet radius doesn't so much increase strength as it ------s out
> the stresses on the crank. Without it, all of those stresses would
> concentrate at the sharp corner leading to eventual fatigue failure.
> This is why aircraft engine crankshafts have radiused journals.
>
> ----------------------------------------------------
> Del Rawlins- del@_kills_spammers_rawlinsbrothers.org
> Remove _kills_spammers_ to reply via email.
> Unofficial Bearhawk FAQ website:
> http://www.rawlinsbrothers.org/bhfaq/

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

This is the world according to C:

news group. He wanted his point known, disregarding the original post saying
he required narrower bearings. But, there would have to have been some
submerge arc welding on that crank to make the fillet narrower?

Grinding makes the fillet area wider, does it not?

Refinish King


"Del Rawlins" <del@_kills_spammers_rawlinsbrothers.org> wrote in message
news:20040405204257046-0800@enews.newsguy.com...
> In <jvocc.45753$z%1.23192@twister.rdc-kc.rr.com> c wrote:
> > 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.
>
> The fillet radius doesn't so much increase strength as it ------s out
> the stresses on the crank. Without it, all of those stresses would
> concentrate at the sharp corner leading to eventual fatigue failure.
> This is why aircraft engine crankshafts have radiused journals.
>
> ----------------------------------------------------
> Del Rawlins- del@_kills_spammers_rawlinsbrothers.org
> Remove _kills_spammers_ to reply via email.
> Unofficial Bearhawk FAQ website:
> http://www.rawlinsbrothers.org/bhfaq/

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

This is the world according to C:

news group. He wanted his point known, disregarding the original post saying
he required narrower bearings. But, there would have to have been some
submerge arc welding on that crank to make the fillet narrower?

Grinding makes the fillet area wider, does it not?

Refinish King


"Del Rawlins" <del@_kills_spammers_rawlinsbrothers.org> wrote in message
news:20040405204257046-0800@enews.newsguy.com...
> In <jvocc.45753$z%1.23192@twister.rdc-kc.rr.com> c wrote:
> > 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.
>
> The fillet radius doesn't so much increase strength as it ------s out
> the stresses on the crank. Without it, all of those stresses would
> concentrate at the sharp corner leading to eventual fatigue failure.
> This is why aircraft engine crankshafts have radiused journals.
>
> ----------------------------------------------------
> Del Rawlins- del@_kills_spammers_rawlinsbrothers.org
> Remove _kills_spammers_ to reply via email.
> Unofficial Bearhawk FAQ website:
> http://www.rawlinsbrothers.org/bhfaq/