[SEL] Crankshaft extending

[peter ogborne]

George ,some years ago a friend and I restored a 1904 portable steam engine 
http://www.steamengine.com.au/steam/restore/arthur/index.html
The original owners had gas axed the crankshaft and dropped the large 
flywheel so that they could drag it through the bush to create a track.
We shrunk an extension on to the shaft......using dry ice and heat .Still 
running and you can not see where this repair occurred.
It may be a bit ''over the top'' for your application but it is one way of 
doing it.
----- Original Message ----- 
From: "Best, George" <George_Best at adp.com>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Thursday, September 13, 2007 12:32 AM
Subject: [SEL] Crankshaft extending


> I've got an engine where someone took a hacksaw and shortened the
> crankshaft for some reason.  Maybe it stuck out too far and they didn't
> want to use a belt pulley on it.
>
> I'm wondering if it is feasible to extend the crankshaft, or should I
> find replacement crankshaft instead?
>
> What I'm thinking is that I could put the crankshaft on the lathe and
> true up where they cut the shaft.  Then center bore the shaft.
> Make an extention piece with a stub to fit the bored hole in the
> crankshaft.
> Press the extention piece in.
> Weld the seam.
> Then clean up the joint in the lathe.
>
> Does this sound like a feasible way to fix the crankshaft?
>
>
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