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Old 09-18-2018, 01:33 PM
epicfail48 epicfail48 is offline
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Join Date: Aug 2017
Location: Springfield Mo
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I run my carbide burrs in a pneumatic die grinder running about 35k rpm, never had an issue with them. This is a half inch cylinder burr as well, lasts me through a few dozen knives worth of shaping. Cant imagine why youd want to run them slow, after all most of them are made for die grinders.

Cold working brass can be done, once. Brass work hardened incredibly fast, so you can bend it once but after that it usually cracks if you try a second time. You might be able to get your project done in a single bend, but youll want to make sure you can anneal it just in case. Blow torch and a cup of water is all you need, heat it till it glows then quench it, same as hardening steel, only in this case itll make things soft
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