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Old 03-04-2012, 1:52 PM
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mattmaxsr mattmaxsr is offline
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I've work with Al. in many alloys and the most important thing I've found is use a sharp tool, second feed and speeds.
If you use a bench top drill press it's hard to get the RPM's low enough not to create heat and vibration. I saw that locating punch and thought about getting one but didn't... yet!
also a pilot drill can help but if your using a mill for the barrel hole, the setup should be stiff enough that you don't need to step drill to the final size.
I would step drill if using a small or light duty drill press.
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Last edited by mattmaxsr; 03-05-2012 at 12:10 PM..
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