The stepper motor uses existing stator assemblies and rotors. Specifications based on those:

  • Bipolar, 2 phase
  • Step angle: 1.8 degrees
  • Rated voltage: 3.2 V
  • Rated current: 1.2 A
  • Phase resistance: 2.6 Ohm
  • Phase inductance: 4.3 Ohm
  • Holding torque: 0.28 Nm
  • Detent torque: t.b.d.
  • Weight: approx. 210 g

Specifications and modifications based on the customised parts:

  • Shaft thread: M10 x 0.75mm (fits KM type nut)
  • Shaft has 4mm sealing area
  • Shaft has 2mm keyway for rotation locking
  • Shaft bore: 6.5mm (drill finish)
  • Shaft material: SS 316
  • Bearings upgraded from 5x16x5 to 12x21x5
  • Flange has shaft seal 12x20x5 (fits both hydraulic seals and common shaft seals)
  • Flange has groove for 1.78mm O-ring
  • Bearing fit in housings changed from very loose to K7 (tight) fit to reduce shaft wobble
  • Changed wave washer to work on shaft side