[TheForge] Krause/Nazel type air hammer

Mon Dec 2 00:36:00 2002

Steve, I don't think that I can "improve" you, but I can tell you what
I know about the Kinyon hammers. Kinyon used to be a pneumatics engineer
for General Motors and I believe that he was the prez. of the Arizona
blacksmiths group. He combined his vocation and his avocation and
designed the hammer. He had 3 criteria in mind for his design.
1. That it would operate on a 5 hp compressor, assuming that most shops
in need of an air hammer would already have a compressor in place for
painting, air tools, etc.
2. That it could be built with standard, off-the-shelf air parts for ease of
availability and cost savings.
3. No machine shop work necessary, emphasizing simplicity & cost savings.
Building my hammer http://magichammer.freeservers.com  was a joy and not
very expensive. You can buy all new air parts from PARKER CO. for about
$400, add some pipe fittings, hose and whatever you can scrounge up for the
frame, anvil & base plate, and you have a hammer. This is assuming of
course,
that you already have a compressor and a welding machine and a band saw
and a drill press.
This is a simple hammer. The circuit is pressurized. Opening the exhaust
allows
air through the spool valve to the top of the cylinder, forcing it down. A
little
exhaust causes a little movement of the cylinder (ram, head, top die) and a
light tap. A heavy foot on the exhaust valve (treadle) causes a heavy blow.
This hammer hits a lot harder than my 50# Little Giant ever did.  The
downward
movement of the ram activates a pilot switch. The pilot switch tells the
spool
valve to rout the air to the bottom side of the cylinder, thus forcing the
cylinder
upward and activating the pilot switch once again which tells the spool
valve to
rout the air to the top of the cylinder, thus forcing the downward stroke
and
the cycle keeps repeating. The Kinyon hammer does not have the ability to
clamp & hold a piece of work. Bob Bergman's "KA-75" can do that quite well
as will the "Blue" but @ $4,000, they are out of my price range. The Kinyon
is
not a Nazel or a Chambersburg or any of the Chinese / Turkish Nazel
knock-offs.
They cost $8k - $30k and are way out of my price range. The Kinyon cost
about $1,000 or less depending on your local scrap yard. The bottom line is
that
the Kinyon design works quite well and there are lots of them around. I can
think
of 7 Kinyons in a 100 mile radius.
I am not down on the Krause hammer at all. In fact I think that it's
probably a
great idea. I would love to see plans because there is still time to make my
big
hammer in that manner.
dave m

----- Original Message -----
From: "Steve Smith" <[email protected]>
To: <[email protected]>
Sent: Sunday, December 01, 2002 6:15 PM
Subject: Re: [TheForge] Krause/Nazel type air hammer

> Well, I'd like something larger than my current 25 pound LG. This gets
> into a 5-7.5HP compressor pretty quickly from what I hear.
>
> I don't mean to bad mouth the Kinyon design; from what I understand (I'm
> hoping Dave M. will jump in and improve me), Kinyon's push on one side
> of the piston, then push on the other side. You can do a lot of work on
> this style hammer, but it doesn't seem like you have a lot of control of
> the ram position.
>
> Steve
>
>
>
> [email protected] wrote:
> > steve,
> >
> > the idea is pretty straightforward but the transfer of idea to reality
has not been so straightforward as one would hope. krause demoed his hammer
over two years ago. if it was a workable idea and so much better than the
kinyon you would think they (krausehammers) would be all over by now.
> >
> > there has been a lot of talk over on the keenjunk site about this
project. mark krause was posting about his effort to upscale his design to a
larger size. also a guy named john larson has had some success. there is a
search feature at the keenjunk site to search for their postings.
> >
> > i'm surprised that none of the kinyon builders haven't responded to your
comment about kinyons "just bounces between top and bottom". from what i
hear the kinyon hammers are doing a fair amount of work as they bounce. also
a "very large compressor" isn't needed unless you do very large work. check
out larry zoellers downsized kinyon that runs off a fairly small affordable
compressor.
> >
> > bob (still using a 25lb LG)
> > _______
> >
> >
> >>The idea is pretty straightforward. You use a motor to drive a double
> >>acting air cylinder. This is connected to the ram air cylinder (also
> >>double acting) via the air ports. The air provides the give in the
> >>hammer that is done in a Little Giant with a spring and toggle arms.
> >>
> >>The big advantage over the Kinyon style is control. The Kinyon hammer
> >>ram just bounces between top and bottom (or the top and the work). The
> >>Kinyon can only push the ram from one side at a time (assuming I
> >>understand how the Kinyon works...). The Krause/Nazel hammer applies air
> >>to both sides of the piston. The side with the most pressure dictates
> >>which way the ram will move. The pressure can be reversed immediately by
> >>changing the foot treadle position (and altering the balance of
> >>pressure). This makes it much more responsive.
> >>
> >>It is also a way to avoid buying a very large compressor that I don't
> >>have a lot of other use for. Since I'm doing this for fun, I get to
> >>build it myself and mess around with something different.
> >>
> >>Steve
> >>
> >>mike wolfe wrote:
> >>
> >>>
> >>>Steve Smith wrote:
> >>>
> >>>
> >>>>I'm starting on building a Krause/Nazel type air hammer,
> >>>
> >>>
> >>>
> >>>Steve:
> >>>Tell me more about the Krause/Nazel type air hammer, I had seen it in
> >>>operation at the conference, and I had been waiting for Mark to go
> >>>further with its evolution, I also thought "Sid" was getting involved
> >>>with the project a while back.
> >>>I have not heard anything for a while until you had talked of it.
> >>>Are there new plans or new developments about the Krause/Nazel type air
> >>>hammer.
> >>>Any info would be wonderful..
> >>>
> >>>Thanks
> >>>Mike Wolfe
> >>>
> >>>
> >>>
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