[TheForge] Krause/Nazel type air hammer

[Steve Smith]

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" <sos@alum.mit.edu>
> To: <theforge@mailman.qth.net>
> 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
>>