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Re: Re: Re: Re: Drill Bits
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Posted by Scott Green on July 22, 2000 at 06:35:37 from (209.130.133.85):
In Reply to: Re: Re: Re: Drill Bits posted by Dan from PA on July 21, 2000 at 18:49:04:
The tool grinder friend I had , used a very fine grit white stone on most of the high speed steel he sharpened. The stone was not like a bench grinder stone. It looked like a cup mounted sideways. No liquid was used as coolant. The tool was mounted on a slide table. He would move the table back and forth , skimming the stone at every pass.The RPM'S were quite high , but I'm not sure what it was. On the other hand , we all know a bench grinder running at 1800 RPM'S will not heat up the material like a grinder running at 3600 RPM'S does.
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