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Kollmorgen AKM42E-ANC2AAOO

Product Introduction
Mid-stack AKM series brushless servo motor with 84 × 84 mm square flange (NEMA 34 class). High torque density, low cogging, potted stator, neodymium-iron-boron rotor magnets. The “ANC2” segment decodes to AKM size 42, N tolerance flange, smooth shaft, resolver feedback with M23 connector; “AA00” denotes no brake, standard paint, no special shaft seal. Direct mechanical and electrical mate to AKD and S700 drives.
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Detailed content

Technical Specifications
  • Frame size:​ 42 (84 mm flange, 100 mm bolt circle, 80 mm pilot diameter)
  • Stack length:​ E (mid torque)
  • Winding type:​ E (400 V class, 320–640 VDC bus)
  • Stall (continuous) torque:​ 3.42 Nm
  • Stall current:​ 2.74 A RMS
  • Rated torque at 640 VDC bus:​ 2.72 Nm at 4000 rpm
  • Rated power at 640 VDC bus:​ 1.14 kW (1.53 HP)
  • Rated power at 560 VDC bus:​ 1.03 kW at 3500 rpm
  • Rated power at 320 VDC bus:​ 0.59 kW at 1800 rpm
  • Max speed:​ 6000 rpm (mechanical), 4000 rpm at 640 VDC rated point
  • Rotor inertia:​ 0.00015 kg·m² (1.45 kg·cm²)
  • Pole pairs:​ 5 (10-pole)
  • Shaft:​ 19 mm diameter smooth or keyed optional, 40 mm extension
  • Feedback:​ Integral resolver, ±8 arcmin accuracy, M23 angular rotatable connector
  • Holding brake:​ none
  • Thermistor:​ PTC
  • Connectors:​ 2 × M23 SpeedTec Ready rotatable (power + feedback)
  • Protection:​ IP54 standard, IP65/IP67 with shaft seal option
  • Insulation class:​ F (155 °C)
  • Ambient:​ 0–40 °C rated, up to 55 °C with torque derating
  • Weight:​ 3.39 kg
Material Composition
  • Stator: laminated silicon steel, copper winding, epoxy potted
  • Rotor: sintered NdFeB magnets, stainless retaining sleeve
  • Housing: anodized aluminum with IEC 84 mm flange
  • Shaft: hardened steel, ground finish
  • Connectors: nickel-plated brass, M23 standard
Structural Characteristics
  • Square flange with 4 × M6 mounting holes on 100 mm circle
  • Smooth shaft with optional keyway
  • Resolver mounted on rear endbell, no separate encoder box required
  • Standardized AKM mechanical envelope allows direct swap across AKM42 stacks
Working Principle
Three-phase stator currents create rotating magnetic field; permanent-magnet rotor follows field angle. Resolver produces analog position signals demodulated by drive to obtain electrical angle for commutation. Torque proportional to q-axis current; speed regulated by back-EMF and load balance.
Installation Requirements
  • Flange-mount on machine structure; coupling must be zero-backlash or elastomer type
  • Avoid radial shaft load > 10% of axial rating; use bearing block for belt/pulley
  • Align motor shaft to load within 0.05 mm TIR
  • Use flexible metal conduit or drag-chain rated shielded cable
  • Resolver cable must be separated from power cable if not using dual-shield hybrid
Usage Notes
  • At 480 VAC mains through AKD-P1207, bus ~680 VDC; do not exceed 640 VDC nameplate continuously without derating
  • No brake means vertical axis needs external mechanical hold
  • Resolver version needs drive resolver interface; AKD auto-detects AKM resolver type on first power-up
  • Do not paint over flange grounding surface; ensure flange-to-machine electrical contact
Applications
Rotary indexers, lab automation turntables, filling machine star wheels, medical imaging gantries, light CNC servo axis, packaging gripper rotation.

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