Reaming allowance of .012" for a .307" dia. hole is too much. Reduce
it to 1/2 that or even a little less. This is for hand reaming.
Machine reaming is a different animal.
Are you sure you have a hand reamer? These have a long taper that does
the cutting. Hence the small amount left to ream to keep the chips
short and the turning effort reasonable.
Hand reaming of brass can be done dry; but I use COOL TOOL II for
drilling and reaming most metals.
Jim Dincau wrote:
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