[TheForge] Hydraulic press vs. Hammer -- Free the Stake

[David E. Smucker]

Looking back on some maintenance experience with very large roll end pods 
that got stuck we always found that hydraulic jacks worked better then 
hitting it.   We would wrap the shaft with copper tubing and run cold water 
through that and then heat the hell out of the pod itself with big burners. 
At the same time applying lots of hydraulic force.  One key was to heat as 
fast as possible to have the outside get up to temperature without giving 
lots of time for heat to transfer to the shaft.  Moved some big press fits 
this way that had internal gauls.  (24 inch dia shafts).

Dave


----- Original Message ----- 
From: "Andrew Vida" <osan at netlabs.net>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Sunday, January 20, 2008 7:41 PM
Subject: Re: [TheForge] Re: Free the Stake!


> I'd forget the ultrasound.  I don't see that the typical setup will do 
> what you want.  I may be wrong, but that is my impression.  You are 
> talking about a large expense in any event.  Just lube it, heat it, and 
> smack the shit out of it with a mallet.  Someone wisely suggested to 
> verify that the anvil is not welded or brazed in.
>
> You could also try to press it out hydraulically.  A manual press would be 
> handy in this case.  Slow and precisely controlled pressure.  If the tang 
> is inclined to move at all, the press should made short work of it, short 
> of having been shrunk on.  Do you have photo images?
>
SNIP