[TheForge] Krause/Nazel type air hammer

[Larry and Pat Brown]

The valves only move with the treadle as the air flow is created by the 
rear piston

The machining part that slowed me down quickly was lapping the valves in 
place(Unfamiliar territory as far as experience and tools). The two guys 
with machine tools I talked to didn't want to get involved
L Brown


At 09:38 PM 12/3/2002 -0600, you wrote:

>----- Original Message -----
>From: "Gladish Family" <gladish@cnw.com>
>
>
> > I decided not to build one of these because of how much time I don't have,
> > but after gazing at Mark's book and my sketch pad for hours, I concluded
> > that the job could be done by a linkage that activates two ball valves.
>One
> > opens as the other closes.
> > Times two, of course, for upper and lower air passages.
> > Get the proportions of the levers right for the treadle travel, and you've
> > got it with components you can buy at Ace Hardware.
> > Simple, huh?
> > Not as cute as Mark's, but it would work.
> >
> > Andy G.
> >
>
>I would be concerned that the ball valves that you would buy at a "Home
>Depot" type store would nt hold up to the rate of cycling that you want from
>a air hammer. Haveing build a few test fixtures that I had to run at cycle
>rates 12 to 120 cycles/minute I don't think the valve stims could take it
>for long.
>
>Dan Rathburn
>Elgin, IL USA
>
>
>
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