Nidec Servo KH42KM2-911 2-Phase Hybrid Double Shaft Stepping Motor. Unit was pulled from a decommissioned system in working order. 

Info on Stepper:
Manufacturer's Description:
  • DRIVE METHOD: UNI-POLAR
  • NUMBER OF PHASES: 2
  • STEP ANGLE | deg./step: 1.8
  • VOLTAGE | V: 3.72
  • CURRENT | A/PHASE: 1.2
  • WINDING RESISTANCE | Ω/PHASE: 3.1
  • INDUCTANCE | mH/PHASE: 3.1
  • HOLDING TORQUE | mN・m: 340 |oz・in: 48
  • DETENT TORQUE | mN・m: 19.6 | oz・in: 2.8
  • ROTOR INERTIA | g・cm2: 85 | oz・in2: 0.46
  • WEIGHTS | g: 360 | lb: 0.79
  • INSULATION RESISTANCE: 500VDC, 100MΩmin.
  • DIELECTRIC STRENGTH: 500VAC, 50HZ, 1min.
  • OPERATING TEMP. RANGE | ℃: 0 to 50
  • ALLOWABLE TEMP. RISE | K: 70
ALL QUESTIONS AND OFFERS WELCOME