[TheForge] Air hammer return stroke

Tue Feb 4 13:35:02 2003

It works so good because the top and bottom of the cylinder are working
together. In a compressor driven air hammer the top and bottom of the
cylinder are fighting each other.

Darrell

----- Original Message -----
From: "Steve Smith" <[email protected]>
To: <[email protected]>
Sent: Monday, February 03, 2003 7:33 PM
Subject: Re: [TheForge] Air hammer return stroke

> 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
>
> [email protected] 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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