A guy is parking his 1-ton flatbed dump truck at my house for a bit while he gets his affairs in order. He gave me a "bunch of junk" lying around in the cab & underbody boxes. In there was an old I-R air tool, completely frozen. I took it to the repair shop today (late Friday afternoon) and the whole place stopped while the old guys there came over and figured out what it was. It's a Model 330 low speed tire buffer. It's got a body like a straight die grinder, but it has planetary gears on the output so the output shaft only goes at 2500 rpm. It has a very weird chuck - a quickchange 7/16" hex chuck.
One of the guys did me a favor and monkeyed with it until it came loose and so now it runs again. It turns out that the chuck threads onto the spindle, and that the spindle threads are 3/8-24 which is a standard size. I have keyed drill chucks that size, so I put one on.
I tried searching online for tire buffer tooling but found very little indeed. Do any of you know anything about 7/16" hex quickchange tooling?
Grant Erwin Kirkland, Washington