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Your cart is empty.Made of high grade tool steel. Hardened and Ground. Drawbar end Thread : R8- 7/16" -20, MT2- 3/8" -16, MT3- 3/8" -16, MT4- 1/2" -13, #30- 1/2" -13, #40- 5/8" -11, #50- 1"-8.
AJB
2025-08-03 18:08:34
Screw threads fit and it runs true, not much more to say.
Kevin
2025-07-22 18:40:15
Perfect
Peter Kehagias
2025-07-13 13:15:33
It does what it's supposed to, but I wish they didn't paint it/oxidize it/whatever the black coating is after cutting the threads, because it was too snug to attach my boring head to. I had to run it in my mill and hit the threads with a wire brush to strip it off, and then I was barely able to thread it on by rotating it from the draw bar with a wrench while holding the boring head steady with a bar. It goes on/off much easier now, but expect it to give you a small fight the first time or two.Otherwise, it worked great so far.
Michael S.
2025-06-14 16:20:08
Good fit and finish.
Vegas OBie
2025-06-09 10:59:47
Good unit, BUT, Draw bar NOT what was advertised.Drawbar TPI received was 1/2"-12 TPI. 12TPI is also a Non-Standard TPI, 13TPI is more COMMON!
Timothy Hurley
2025-04-15 14:33:08
I had to re tap the threads on the collet end but after that it looks okay
Charles
2025-03-14 12:31:41
Arbor work good but if I had to do it again I'd buy the 3/4-in diameter shank.
Customer
2025-03-03 18:16:24
I have a mill with an Erickson QC30 spindle. I've got a bunch of collet chucks with a 3/4" capacity, and this thing wobbles uncontrollably in every single one of them. At any RPM, any feed rate, any length or geometry of boring bar, it screeches so loudly it could almost fill in for AC/DC's lead singer. I mean, at 75 RPM, .001" per revolution, it's screaming just as bad as it does at 1000 rpm and 3 ipm.In the end, I wound up buying an (even cheaper) NMTB30 boring shank and sending it out to have the flange re-ground to QC30 spec. The grinding work cost literally 14 times more than the shank did, but I can sink the *same* boring head with the *same* boring bars into the *same* 6061 aluminum at 1500 RPM with no problem, and get a mirror finish at .003-.005" per revolution.Rigidity and concentricity make a BIG difference, ladies and gentlemen, and this thing? Not rigid enough.
Dennis Hirst
2025-01-18 18:44:38
great
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