[Jeff Davis]

Not total sure if this would be considered off topic, but all you guys have been so helpful with my other questions.

I built a belt drive conversion for my little X1 and for the most part it works pretty well. However once my spindle speed exceeds about 3000 rpm I start getting some vibration. The problem is in the shaft adapter from the motor to the pulley. I am sure that the hole the motor shaft goes into is a little bit out of round. I used a standard twist drill hoping that it would work. I don't have a reamer which is what I think would be the best tool choice or a super mini boring bar. Final hole size is .314 and about 1.25" deep. Any ideas that won't cost me an arm and a leg?

Thanks,

Jeff Davis

[hoss2006]

I keep a set of the boring bars used for boring heads around.
They're cheap and easy to grind away the excess to fit smaller holes.
Use them in the lathe all the time.
Can get a whole set for less than the cost of one good carbide boring bar
that I use for steel.
Hoss

[Jeff Davis]

Thanks Hoss! I happen to have some of those cheapy carbide tip boring bars. Didn't think about grinding one down so I could hit the hole clearance. I will give it a shot this weekend after I turn a new adapter.


Jeff