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Posted

I got an email asking if I knew how to drill a 9/64th inch hole in a piece of 3/8 round titanium MM2 steel. The hole is to be located on an already flat area on the round bar. The hole is to be located about 3/8 inched from the end of a 3 inch section of round bar and to go parallel to the diameter and completely through the stock.

Any suggestions would be appreciated.

Posted

Titanium can be drilled with ordinary HSS bits. It will overheat easily so use a drill press and adequate pressure to keep a steady curl coming. Of course the bit should be a sharp one. You should also use a cutting oil to keep the bit cool and biting properly. Because 9/64" is pretty small diameter it may require more than one bit for this project as bit breakage could be a factor and sharpness is essential. Here is a good video on drilling titanium: http://www.youtube.com/watch?v=5ktFcBSOhlo

Posted

Ah the question was "titanium MM2 steel" not titanium. I'm a little worried that we don't have the correct designation: a M2 steel can be a bit of a pain, much harder than drilling titanium!

Or that it might be something like "Neiko 3-Piece Titanium Step Drill Bits Set M2 Steel" So a titanium nitride coating on a hardened M2 high speed steel...

I'd get more details before I pass on that info!

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