1993 - Volume #17, Issue #3, Page #30
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Simple Way To Sharpen Drill Bits
"I got the idea years ago from a welding shop and I've used it ever since to sharpen drillbits," says Bert Wilkins, Yuma, Colo., about the simple drill bit gauge he makes out of two hex nuts.
He welds two large nuts together. The angle where they meet measures 30?'s which is the cutting angle of drill bits.
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1993 - Volume #17, Issue #3