[TheForge] Shrink fitting steel to wood

Sun Aug 10 12:32:02 2003

A point I haven't seen mentioned yet is dry wood. The hub needs to be as dry
as possible or it'll loosen up later with humidity changes in the air.

Frosty
------------------------
If it ain't forged
it ain't real.
Wrought iron is.
The FrostWorks

Meadow Lakes, AK.

----- Original Message -----
From: "gblacksmith" <[email protected]>
To: <[email protected]>
Sent: Saturday, August 09, 2003 10:41 PM
Subject: Re: [TheForge] Shrink fitting steel to wood

> 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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