[TheForge] Air tool pistons

Tue Nov 18 09:44:00 2003

Grant- I've got an old Cleveland tool steel catalog that says all their
impact/riveting stuff was air-hardening/shock resisting steel. I'm not sure
how long the 'S' designations have been around but I would say your close to
the mark. those pistons are at least RHC 60 or so aren't they? I've had
fatigue failure from O-1 tools I've forged that were not very forgiving at
all. Granted, this has been with backyard heat treatment. It does have
impact strength but (from my experience) can't take the deformation that
S-series can. (metallurgists- feel free to comment~)

steve

-----Original Message-----
From: gblacksmith [mailto:[email protected]]
Sent: Monday, November 17, 2003 6:08 PM
To: [email protected]
Subject: [TheForge] Air tool pistons

Dear fellow metal-heads:  Does anyone out there know what type of steel that
air-tool interior pistons are made of?  I have found a source of these
(free) pistons, which are 1.25" diameter and 4.5 " long.  I'm thinking they
are likely S-1, S-7 or O-1 ( if they are going cheap).  The pistons are from
pneumatic rivet hammers marketed by "American Airmatic" as "rivet busters."
I don't know the exact maker.

Grant  

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