[TheForge] Re: Free the Stake!

[Peter Fels And Phoebe Palmer]

An additional influence in terms of a static load forcing the 
butt end of the stake back into the swage block is often helpful 
in this sort of thing. Some heavy chain on either end of a stout 
cross member fastening the cross member to the sides of the block 
gives the jack something to push against.
Then keep oiling and tapping, heating and cooling...applying and 
releasing pressure............Sooner or later it'll change its 
mind and leggo.           pf

xlch58 at swbell.net wrote:
> Mike Spencer wrote:
>>> The ultrasonic technology is fascinating, but how practical a
>>> suggestion is it?
>>>     
>>
>> Not very.  OTOH, subsonic might be effective: suspend the block/stake
>> combo upside down on something pretty hefty, then go aboard of it with
>> a pavement-breaker sized jackhammer at 10 Hz.  Probably pop that
>> sucker out in no time.  Easier to borrow a big mutha jackhammer and
>> compressor than a wading pool sized sonicator, too. :-)
>>
>> Jobs like this are just about the only thing I use my 16# sledge
>> hammer for -- e.g. getting a 1-7/16" shaft out of a flatbelt pulley.
>> But I wouldn't want to counsel a move that might bust your swage
>> block.
>>
>>
>> - Mike
>>
>>   
> As long as we are taking flights of fancy, a simpler approach might be 
> to bolt a good sized electric motor to the stake (big all thread u 
> bolts) and mount on off balance weight to the shaft and let it run with 
> penetrating oil.   I have made these vibrators before for 
> sandblasters.   The off center weight  is easy to make, just drill a 
> hole a 1/2 inch from the side of a chunk of square and drill and tap it 
> for a set screw.
> 
> Charles
> 
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