On Friday, January 17, 2014 1:20:26 PM UTC-8, Bob La Londe wrote:
"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message

. 3.70...

Yeah. If the reamer is sharp and you dawdle in the hole, any tiny bit of

misalignment between tailstock and headstock will translate to the

reamer's

taking more cuts as it exits. You can't completely eliminate that, but

you

can minimize it by getting out of the hole as fast as possible.



If everything were perfect, it wouldn't do any cutting on the way out,

anyway, so the speed wouldn't matter. But it does.



Lloyd



Don't you run the risk of a deep spiral score mark that way?









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Are these thru holes?

You want no risk use an M00 so you can check and if necessary clean the reamer by hand before you retract it from the hole.