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Reply to "TiN drill bits"

Cutting oil goes a long ways in extending the life of any drill bit, heat is the enemy.  I agree with the previous John, you can eventually dull them.  I bought a large box of multiples of every size, and when one gets dull, I just replace it.  I figure the box will last my lifetime.

 

Sharping the Titanium bits is possible, but they're no longer Titanium as it's only a coating.

 

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