Digital guide
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Kollmorgen AKM21C-ESB2C-02
Product Name: AKM2 Series Permanent-Magnet Synchronous Servo Motor
Family: AKM™ AC Synchronous Servo Motors
Introduction: Compact, high-power-density brushless servo motor from the AKM2 frame size (58 mm flange class). Designed for dynamic motion axes where space is limited and smooth low-speed operation is required. Native mating to AKD and AKD2G drives with plug-and-play motor recognition.
Detailed content
Technical Specifications
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Frame size: AKM2 (AKM21 = size 2, stack C)
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Rated stall torque: approx. 1.4 Nm (continuous), peak approx. 4.82 Nm
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Max speed: up to 8000 rpm depending on winding
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Windings: 120 / 240 / 480 VAC or 75 VDC options; “C” winding = mid-voltage class
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Feedback: SFD3 / HIPERFACE DSL / EnDat 2.2 / resolver (SFD smart feedback supported)
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Encoder resolution: up to 24-bit (SFD-M), 16.7M counts (EnDat 2.2)
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Brake: optional 24 VDC fail-safe brake (holding torque ~1.42 Nm)
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Protection: standard IP54, IP65 with shaft seal option
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Insulation: Class F (155 °C), 100 °C winding rise over 40 °C ambient
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Connectors: Intercontec SpeedTec single/dual cable, rotatable or straight
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Shaft: smooth, open keyway, or closed with seal
Features: Very low cogging, low harmonic distortion, full-frequency autotuning on AKD, co-engineered sealing and feedback options, cURus / CE / UL recognized.
Applications: Semiconductor handlers, medical automation, packaging, robotics, CNC auxiliary axes.
Construction: Aluminum housing, rare-earth magnets, laminated stator, precision bearings.
Installation Notes: Use Kollmorgen shielded motor and feedback cables; separate power and signal routing by ≥200 mm; ground shield via clamp to drive chassis.
Precautions: Do not exceed 40 °C ambient without derating; verify brake voltage is 24 VDC ±10%; avoid axial shaft loads beyond catalog radial/axial force curves.
