[TheForge] Air hammer return stroke

[Steve Smith]

I'm using a little shy of a 2:1 ratio. My drive cylinder is 5" diameter, 
5" throw (which I will have to shorten a little to make sure it doesn't 
whang itself). The ram cylinder is a 2.5" diameter hydraulic cylinder 
(thus the large rod). It started life with a 12" throw, but now is only 
useful over about 10". I suspect that the cylinder is clapped out by 
hydraulics standards, but seems to be fine for air. I'm making a 60 
pound ram.

I still don't think I follow how these hammers work. I follow the air 
flow and such, but it seems like way too much work gets done too quickly 
for the amount of air pressure involved. I guess I will learn this as I go.

Steve

schade@acegroup.cc wrote:
>  The rod on the cylinder that the
> 
>>>>discs would go around is 1 1/8" diameter. A large coil spring would also
>>>>work, but I don't have a source for one.
>>>>
>>>>Any other suggestions out there?
>>>>
>>>>Thanks,
>>>>Steve Smith
>>>
> 
> 
> Steve,
> 
> A 1-1/8" rod on your ram cylinder? That sounds like a fairly large diameter cylinder...maybe 5"- 6"? If your ram cylinder is that big how big do you figure your "pump" cylinder will be? Stroke of ram cylinder? How heavy is the ram? Will you go with 2-1 volume as per Krause?
> 
> Bob S.
> 
> 
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