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Hey Guys, I need to put Deep counter bores in some Magnesium blocks. I found some HSS long drills on MSC.
http://www.mscdirect.com/browse/tn/Holemaking/Drilling-Drill-Bits/Metalworking-Multipurpose-Drill-Bits/Extra-Length-Drill-Bits?navid=12106289+4288175036+4288243942+4288174924+4288243940
The C'bores are Ø.75 x 8" Deep sharp corner with .410 thru hole. It looks like drilling the c'bore and the thru hole isn't to much of a problem. Any suggestions on the C'bore tool to cut the flat bottom? Final depth is 7.7
Also, with no TSC, would a .750 - 1.0 peck be sufficient?
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