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Kollmorgen AKM21C-ANS2GB03

Product Introduction:​
The AKM™ series offers standardized NEMA/metric flange mounting, low-cogging magnet designs, Class F (155 °C) insulation, and a wide selection of windings for global voltages. The AKM21 frame is a small-inertia motor; “C” stack length gives medium continuous torque for the frame. “ANS2GB03” decodes approximately to: A=Standard, N=No seal upgrade (IP65 std), S=SFD (Smart Feedback Device — electronic motor nameplate), 2=Connector orientation, G=24 VDC spring-applied fail-safe brake, B03=Smooth shaft with keyway variant / specific winding code.
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Detailed content

Typical Performance Parameters (AKM21C, 320 VDC bus):
  • Rated Power:​ ~0.32–0.45 kW (depends on winding voltage)
  • Continuous Stall Torque (Tc):​ ~0.55–0.70 Nm (varies by winding; Kt ≈ 0.16–0.18 Nm/A for AKM21C-D/E windings; C winding is intermediate)
  • Peak Torque (Tp):​ ~2.1–2.5 Nm
  • Rated Speed:​ 3000–6000 rpm (winding-dependent; 3000 rpm typical for 230/400 V windings)
  • Torque Constant (Kt):​ ~0.16–0.18 Nm/Arms
  • Back EMF Constant (Ke):​ ~10–11 Vrms/krpm
  • Winding Resistance (line-line):​ ~3–5 Ω (typical for AKM21C)
  • Rotor Inertia:​ ~0.16 × 10⁻⁴ kg·m² (0.16 kg·cm²)
  • Brake Holding Torque:​ ~0.3–0.5 Nm (24 VDC spring-set)
  • Shaft:​ 9 mm diameter, smooth with flat / keyway per B03 option
  • Feedback:​ SFD (Smart Feedback Device) — absolute position stored in motor EEPROM for plug-and-play with AKD/S200
  • Connector:​ Intercontec / M23 rotatable angled connector pair (power + feedback)
  • Degree of Protection:​ IP65 (with proper cable glands)
  • Insulation Class:​ F (155 °C), thermal overload protection via PTC thermistor or KTY84 (model-dependent)
  • Mounting Flange:​ IEC metric 60 mm or NEMA 23 equivalent
  • Weight:​ ~1.1 kg (without brake); +~0.13 kg with brake
Material & Construction:
  • Stator: Copper winding with Class F insulation, silicon steel laminations
  • Rotor: Rare-earth Neodymium-Iron-Boron (NdFeB) permanent magnets, epoxy-bonded
  • Housing: Aluminum alloy, anodized or painted
  • Shaft: Alloy steel, ground, with keyway
  • Seals: FKM (Viton) lip seals for IP65 rating
Installation & Notes:
  • Brake releases at 24 VDC; ensure brake release is interlocked with drive enable
  • Align motor coupling without imposing side load > specified radial thrust
  • Use shielded twisted-pair cables for feedback; connect shield drain to drive PE
  • Do not disconnect SFD feedback while powered — may cause false motor-ID errors

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