John Ross wrote: > *Other question is, I am going to be using #1 pins, and want to use 'the > Nossaman' system of double drilling, rather than using the air stream to > cool the bit.* > *What size for the first and second passes?* > *John Ross* > *Windsor, Nova Scotia.* Drill the first pass about 0.015" smaller than the second pass. Drill the second pass to the size that gives you a torque level you like in the block you use. Ron N
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