What cutting oil for reaming brass?

I was taught to ream brass dry.

GWE

JD,

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.

Wolfgang

Jim D> I need to ream about 100 .307 dia holes in brass. I am using a 6 flute hand

Jim, which alloy brass??

360 free mach> I need to ream about 100 .307 dia holes in brass. I am using a 6 flute hand