LD1
Epic Contributor
But the diehard guys all say the NMTB 30, NMTB 40, and obviously NMTB 50 are all much more rigid, stable, modern, and desirable for ultimate rigidity/accuracy.
Thats absolutely correct. And I too like the ER collets. It Grips carbide tools better, and (a good set) is superbly accurate. The tool holders that use a set-screw, That set screw actually pushes to tool to one side of the holder. Not much. Talking maybe a tenth of a thousandth. But for super precise slots or keyways, they will cut a tad larger than the same tool in a ER. And most carbide tooling doesnt have a flat for the setscrew, therefore its proned to slip in heavier cuts as well. ER's are the only way to go IMO.