[TheForge] Shrink fitting steel to wood

Sun Aug 10 02:46:01 2003

Shannel:  The closer the fit when the pieces are cold, the less heating is
necessary.  The pieces should nearly fit cold, with the heat applied to make
the last little bit of fit-up possible by expanding the metal ring enough to
snugly fit.  Is the wooden hub oak? Maple?  Ash?  Hickory?

Grant

----- Original Message ----- 
From: "Shannell Sugrue" <[email protected]>
To: <[email protected]>
Sent: Saturday, August 09, 2003 6:20 PM
Subject: Re: [TheForge] Shrink fitting steel to wood

> I thought Id have to do it red hot at least and pour water on it to help
> prevent the wood from burning?
>
> ----- Original Message -----
> From: "gblacksmith" <[email protected]>
> To: <[email protected]>
> Sent: 10 August, 2003 3:49 AM
> Subject: Re: [TheForge] Shrink fitting steel to wood
>
>
> > Channel:  The grease is not necessary or advised.  You can effectively
> > shrink fir a ring to an axle by heating the metal ring to roughly 325F
and
> > driving it on.  It will contract as it cools. This is how ring gears are
> > fitted to fly wheels in cars.  The wooden axle must be dimensionally
true
> > and smooth and be made of a hard wood for best results.
> >
> >
> > Grant
> > ----- Original Message -----
> > From: "Shannell Sugrue" <[email protected]>
> > To: <[email protected]>
> > Sent: Saturday, August 09, 2003 1:23 AM
> > Subject: [TheForge] Shrink fitting steel to wood
> >
> >
> > > Im working on some canons for a customer and want to shrink fit steel
> > bands
> > > to the ends of the axles, these will be around 4" dia or 100mm, if I
can
> > get
> > > 100mm id steel pipe that is 6mm or 1/4" wall what would be a good
tight
> > fit
> > > to turn the axles to so when the bands are applied and shrunk they
never
> > > come off? Should I use any type of grease under these bands when
> applying?
> > > the customer seems to think so but I didnt think it was a good idea.
> > >
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