Hi guys, I am in the process of polishing a set of aluminum wheels and have been reading about what the ideal speed to use us (3600-7000rpm) and what size wheel to use etc and now I need to make a decision as to what tool to get the job done. A polishing or bench grinder is out of my budget range. Aside from that I think it would be hard to use an 8inch wheel in a lot of the parts.

So with that said, I have found 2 mini-die grinder that say they have adjustable speeds on them. But the problem is they never say what the slowest speed would be once adjusted. The max speed is 25,000 which is way too fast for polishing. I was thinking 4"inch wheels and adjusting the die-grinder to 7000 rpm (not sure if that is possible)

Campbell Hausfeld PL1520 Pro 1/4" Mini Die Grinder:
http://www.amazon.com/Campbell-Hausf.../dp/B000Q5VHWO

Chicago Pneumatic CP876 Air Mini Air Die Grinder:
http://www.amazon.com/Chicago-Pneuma...4217277&sr=1-2

Anyone have any experience here as to speed and or which one is best? Or if this is even possible?

thanks in advance!  

3400 to 7000 rpms is probably on a 6 to 7 inch buffing pad...


smaller needs to go faster..    

metering valves can be had from any painting equipment supplier...

putting it at the end of the full size 4 or 6 foot whip hose will allow enough start up air to run the diegrinder along with the ajustability to limit top speed....


hope this helps...