ISO 5.5F

The model ISO 5.5F spindle was originally designed to meet the demanding requirements of the ultra-precision single point diamond turning industry. The application of the ISO 5.5F has grown to include conventional flycutting, raster flycutting, free-form surface generation, HDD servo track writing, DVD mastering, and metrology in vacuum environments. The Spindle’s central stiffness and extremely low error motion while being driven with a powerful brushless-DC motor can not be matched by any other spindle manufacturer in the world.

See a few example parts machined with the ISO 5.5F spindle.


  • Inlet Pressure: 7 bar
  • Ultimate Axial Load Capacity: 1110 N
  • Ultimate Radial Load Capacity: 980 N
  • Axial Stiffness (at spindle nose): 228 N/µm
  • Radial Stiffness (at spindle nose): 98 N/µm
  • Axial Error Motion: < 12.5 nm
  • Radial Error Motion: < 12.5 nm
  • Maximum Speed: 10,000 rpm
  • Motor Torque: 2.8 N·m continuous to 5,200 rpm (AX-2000)
  • Drive Amplifier: MCS AX-2000
  • Encoder #1: Renco #R35i, 1024 line count with commutation tracks
  • Encoder #2: Renishaw RESM, 9000 line count with one read head (mounting provision for second read head)
  • Through spindle vacuum porting connection.
  • Integral water jacket for liquid cooling.
  • Spindle to amplifier cables: 4.0 meters long
  • Spindle Weight: 340 N


  1. Second Renishaw read head.
  2. Motor power and communications cables custom length.
  3. Customer-specified vacuum chuck.

  4. See Price List