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Kollmorgen M-403-B-21-B3
Product Introduction:
The Goldline M-Series are classic Kollmorgen brushless servo motors with rare-earth magnets, optimized for medium-inertia applications and compatibility with SERVOSTAR amplifiers. Frame size corresponds to NEMA 34 / IEC 80 mm class. The “-B-21-B3” suffix typically denotes winding code (B = specific voltage/torque constant), feedback (21 = encoder option), and connector/mount variant (B3 = MS connectors or flying leads, flange mount).
Detailed content
Typical Performance (M-403 / Frame 40 class):
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Rated Power: ~1.3–1.8 kW (depends on winding)
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Continuous Stall Torque: ~6.9 Nm (B-winding typical for M-403)
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Peak Torque: ~19.9 Nm
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Rated Speed: 3000–5000 rpm (winding dependent)
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Max DC Bus Voltage: 320 VDC
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Rotor Inertia: Medium (higher than AKM low-inertia, suited for inertial matching)
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Feedback: Typically optical incremental encoder + commutating Hall sensors; resolver optional depending on suffix
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Winding: “B” winding → optimized for 230 VAC / 320 VDC bus
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Insulation Class: F (155°C) or H (180°C) depending on vintage
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Mounting: Flange mount, smooth or keyed shaft, rear shaft optional
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Protection: IP65 with sealed connectors/caps
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Thermostat: Normally closed bimetallic thermal switch (KTY or PTC)
Materials & Construction:
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NdFeB rotor magnets, epoxy-impregnated stator windings
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Cast aluminum or steel flange, black epoxy coating
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Sealed ball bearings, greased-for-life
Installation & Notes:
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Pair with SERVOSTAR S300/S400/S700 or AKD (with appropriate commutation setup).
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Check feedback pinout carefully — Goldline motors use proprietary encoder/resolver pinouts.
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Legacy product — AKM series is the modern replacement recommendation.
Applications: Machine tool spindles (aux), printing rollers, converting unwind/rewind, textile drafting, general automation where medium inertia aids load coupling.
