SUMITOMO Fine Cyclo A-Series FC Type

Backlash-free cycloid gearboxes achieve very high positioning accuracy. In addition to accuracy, they also have other useful properties and are used, in addition to applications requiring high accuracy, in applications where small installation dimensions and high overload capacity are required.
One such application is, for example, automatic trays, which are part of every CNC machining center.

Variants of the input shaft:

  • Full shaft with pen
  • Clamping ring / clamping sleeve
  • Splined gear shaft


  • High rotation accuracy
  • High load capacity for small installation dimensions
  • Zero mechanical backlash
  • Lost movement <1 angular min
  • Number of sizes 6
  • Gear ratios 29:1 / 59:1 / 89:1 / 119:1 / 179:1 (availability depends on size)
  • Nominal torque 149 Nm to 3900 Nm
  • Acceleration torque 335 Nm to 7610 Nm
  • Max. Current peak torque 785 Nm to 24,000 Nm
  • Input speed up to 6150 rpm
  • Torsional stiffness up to 1100 Nm/arcmin
  • Maximum freedom and flexibility when installing external bearings and when integrating into specific machine designs