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Old 05-09-2019, 10:38 PM
John Buchtenkirch John Buchtenkirch is offline
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Default CP fender hammer up for auction

I have a hand held CP fender hammer listed on eBay now Vintage auto body fender hammer. Chicago Pneumatic planishing hammer. Pettingell if anyone might be interested. ~ John Buchtenkirch
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Old 05-10-2019, 01:11 PM
crystallographic crystallographic is offline
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Quote:
Originally Posted by John Buchtenkirch View Post
I have a hand held CP fender hammer listed on eBay now Vintage auto body fender hammer. Chicago Pneumatic planishing hammer. Pettingell if anyone might be interested. ~ John Buchtenkirch

Hi John,
I know these old hammers keep going and going, and that if they rust up tight they can be freed up with penetrant and then run some more.
However, at some point in the long (abused) life of the air motor, after consuming a fair amount of scale rattling down the air supply pipe, the piston will wear and the bore will wear to the point when even a constant supply of oil will not keep it running.

In fact, I had a guy with two of these old CP machines call me about this last week - they run only a minute after oiling. I told him about wear in the air motor and to make a new oversized piston, fit to the worn bore.
Like you, I've owned a bunch of handheld planishers - and old air motors - and every once in a while they actually need rebuilding with a new component and maybe even some some honing.
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"All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919.
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Old 05-12-2019, 10:19 PM
John Buchtenkirch John Buchtenkirch is offline
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Kent, this is what my CP hammer experience has been. I picked up 3 pedestal hammers plus some parts (one 24Ē & two 12Ē) when Edkins air tools closed. I bought 8 CP hammers from Grumman (one 36Ē, seven Grumman fabricated) when they closed and bought two 24Ē hammers from Bond Industrial in Brooklyn. Plus Iíve picked up another 10 to 15 (all 12Ē hand held) during 30 years of swap meets and from a few wanted ads in Hemmings.

To be honest there wasnít one I was unable get running. With the ones that didnít run it was always something silly like having the wrong upper die or the indexing pin was snapped or missing allowing the intake port to rotate away from its mating port. One hammer was even assembled with the ports 180 degrees out of sync ! While all CP hammers leak around the barrel to varying degrees Iíve never seen one stop running because of too much clearance around the hammering piston. I will look at your friendís hammer head if he wants me to, unless something is missing or broken Iím 99% sure I can get it running. He would only have to send me the head, I have dies and a frame here. ~ John Buchtenkirch

P.S. I donít see why people have trouble working on CP heads, there is really only one moving part.
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