[TheForge] Krause/Nazel type air hammer

Fri Dec 6 22:06:01 2002

Steve,
I am not an expert at lapping, but a brake cylinder lap can be used. You can
buy them for around 15.00 at auto parts store. They have three prongs which
have a small stone at the end. As the lap spins, the prongs spread outward
to force the stones against the surface being honed..Chuck the lap in a
drill and get at it. I did this to smooth the surface of the bored hole thru
which the spools rotate.
I also cobbled a lap by drilling a hole in the long axis of a scrap round
that was near the size of the valve hole. I made some cuts lengthwise at the
bottom end of the round. I wrapped sand paper around the round and drove a
tapered rod into the hole I drilled so it would cause a little expansion
after it was inserted in the hole. I turned a small diameter on the other
end of the round so it would fit in the drill chuck. I probably could have
gotten by with this lap , but the brake cyl. lap was easy to use.
Bob
----- Original Message -----
From: "Steve Smith" <[email protected]>
To: <[email protected]>
Sent: Friday, December 06, 2002 8:03 PM
Subject: Re: [TheForge] Krause/Nazel type air hammer


> No plans, just his booklet on how Nazel's work with a few pages on his
> prototype.
>
> It looks like spool valves might work; if not, I'm going to have to
> figure out lapping.
>
> Steve
>
> lama wrote:
> > Steve, I don't know about yardsticks, but I don't think that one
> > can compare Kinyons & Nazels. It's like apples & oranges.
> > I would love to have a Nazel,,,, and if I could find one in
> > working order for $1,000 I would grab it. I guess that the bottom
> > line here is that we are talking about folks building their own air
hammers.
> > The Nazel is not a homemade hammer, the Krause & Kinyon are.
> > Kinyon = (no machining necessary) (you need a compressor)
> > Krause = (advanced machining skills required) (you need a lathe etc.)
> > Now if Krause would offer the plans AND sell "the valve", I'll bet that
> > he would have a lot of business. I know that I would seriously consider
> > using that system on my big hammer, but I don't have any machining
> > skills and I don't have a lathe.  I still haven't found out if there are
> > published plans available. Where? how much?
> >
> > dave m
> >
> >
> > ----- Original Message -----
> > From: "Steve Smith" <[email protected]>
> > To: <[email protected]>
> > Sent: Monday, December 02, 2002 8:46 AM
> > Subject: Re: [TheForge] Krause/Nazel type air hammer
> >
> >
> >
> >>It sounds like my Kinyon comments are being taken as critical of the
> >>design. That was not at all my intention. I realize the hammer can do
> >>lots of useful work, and certainly respect Kinyon's contribution.
> >>
> >>The way I think about the difference between the hammers (please add or
> >>subtract as you folks see it) is as follows:
> >>A Kinyon is like moving a ball bearing with a yardstick. The bearing
> >>moves just fine, but when you try to reverse it, it takes a bit to
> >>regain control.
> >>A Nazel is like moving a ball bearing with two yardsticks, one on each
> >>side. You can put it right where you want it.
> >>
> >>The ball bearing is the hammer head, of course, yardsticks are air.
> >>
> >>Hey, please keep up this discussion; I'll be out of town until Thursday.
> >>
> >>Steve
> >>
> >>lama wrote:
> >>
> >>
> >>>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
> >>>>
> >>>
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