[TheForge] Power hammer questions/Frosty

[Jerry Frost]

----- Original Message -----
From: <schade@acegroup.cc>
To: <theforge@mailman.qth.net>
Sent: Tuesday, April 08, 2003 2:22 PM
Subject: Re: [TheForge] Power hammer questions/Frosty


> Frosty,
>
> What do you mean by "oversizing the pistons"? Thanks.
>
> Bob
>
>

Basically making them larger than necessary. One ratio I remember for a 100
lb hammer is: 6" compressor piston and 4 1/2" ram piston. To maintain the
1:1 ratio, the compressor stroke is half that of the ram piston.

If I used 8" compressor and 6" ram pistons for the same weight it would be
what I'm calling oversized. The displacement ratio ensures proper stroke
length on the ram so it doesn't knock the end out of the cylinder. However,
there is almost twice as much ram piston as necessary to do the job and so
the peak pressures would be halved.

I'm not so much advocating this as a good idea as saying if you're not sure
how much piston to use, make them oversize just so long as the displacements
match.

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

Meadow Lakes, AK.