Hu,
Had similar reservations too. On one repeat job, again in 316 s.s., we had to put around 15 -20 1/4-20 holes in it. Initially when we first got our mill we were tapping them with a floating lyndex head. Constantly breaking taps. So we got a solid carbide threadmill. I'd have to say I milled about 60 holes with no problem. Took it in two passes. I'm sold on ADVENT threadmills like your sold on ONECNC. Just flooded the blind hole with coolant and it worked great. I think you'll be surprised at how well they cut. Rpm's are your friend. There really not a lot of chips on a small diameter hole and they break very small. By the way if your tapping in stainless we found a spray on foam by Ashburn that works miracles. Rex supply carries it. Yes, climb mill and I don't think I would run it dry.
Last edited by brtlatjgt; 12-31-2003 at 08:51 PM.
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