Posted by DR. EVIL on July 12, 2017 at 06:09:52 from (174.197.6.235):
In Reply to: Re: What a day! posted by gtractorfan on July 11, 2017 at 18:01:23:
I've got a Craftsman Industrial 1/4" collet die grinder, a Dremel on steroids, I got it 25-30 years ago and have used it sparingly. It still works which surprises me as my history with Craftsman power tools is Not good. If you use an electric die grinder a while it will get so hot you have to wear welding gloves to hold it. Heat kills electric motors, bearings, etc.
About 20 years ago I bought a Chicago Pnuematic 1/4" collet die grinder. I used the Heck out of that thing on cut-off wheels, carbide rotary burrs, abrasive bits, wire brushes. I got a 7-1/2 hp 80 gallon tank 2-stage compressor and I could run that die grinder for 10 minutes before the compressor kicked on. That die grinder sat ready to go anytime I was at my workbench. After 15 years that grinder finally stopped working. I think a vane in the motor broke. I couldn't find anyone local who repaired air tools so ordered a new die grinder, exact same CP model. If I run the grinder more than 3-4 minutes I have to wear gloves because it gets so COLD from the expanding air. I always run the 160-170 psi air from my compressor thru my regulator down to 90-100 psi and my coalescing air filter to remove any moisture or dirt from the air. I give it a few drops of air tool oil every once in a while.
Machine shops, foundries, fabricators all use air tools if possible. Longer life, easily rebuildable. No electric shock hazard, and air tools tolerate the dirty environment much much better. Not much difference in cost between a good electric tool and a comparable air tool, but over years and years of use the air tool costs much less to maintain. Foundry I used to work at had their own air tool repairman on the payroll, he did several other jobs as well.
My Craftsman die grinder pulls 2 amps 110 volts, my compressor pulls 30 amps 220 volts. But to run my air die grinder my compressor runs 3-4 minutes then shuts off for 10 or more minutes. Most times the compressor won't even have to run when I do something. Bet it'S been 18 years since I last used the Craftsman die grinder. That's why it still works!
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