Our broad line of Timken® Fafnir® ball screw support bearings includes single- and double-row designs with a variety of mounting configurations. We offer flanged and non-flanged series for both standard and rotating nut mountings. Housed cartridge and pillow block units facilitate bolting to machine tool surfaces.

Design Attributes:

  • Materials include clean steel for longer service life.
  • Incorporates tighter preload tolerances for chatter-free cutting and tighter width tolerances for easy fit without regrinding end caps.
  • Innovative cage design permits additional balls for higher load capacity.
  • Features ABEC 9/ISO P2 axial running tolerances to deliver maximum accuracy for precise tool positioning and repeatability.
  • Double-row series has integral, low-torque contact seals to exclude contaminants for reliable operation and extended service life.
  • Available in flanged (MMF) and nonflanged (MMN) series, simplifying installation for both standard and rotating nut mountings.


  • Motion control for grinding, milling and machining centers