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More Information
Mfg SKU #202-1575
Tool Holder CategoryCollet Nut
collet seriesER40
collet nut diameter63mm
Collet Nut StyleBearing
thread sizeM50 x 1.5
Maximum Torque Ft/Lb162
collet nut thickness1.14"/29mm


  • High Speed Pre-Balanced

    Internal clamping ring's shape is design to minimize out-of-balance compare to the standard off-center o-ring design from other standard ER collet nut, achieving 12,000 RPM without needed to drill holes on the collet nut body when place on a dynamic balanced machine to preserve ER collet nut's body strength.

  • Internal ball bearing tapered raceway eliminates twisting where the collet and nut makes contact, resulting in a smooth and stable collapse of the collet around the cutting tool thus improving overall runout and clamping force
  • Ball bearing is made from Taiwan and the collet nut is balanced to 12,000 RPM
  • Made from alloy steel hardened to 55-56 HRC
  • Internal thread and taper are precision ground
  • Compatible with most standard ER tool holder and ER collets regardless of the brand
  • Compatible with ER nose style collet wrench