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Kollmorgen SM-56S-3.000
Product Brief: Compact 3-phase PMSM servo motor, frame 56 × 56 mm flange. “S” = winding code (low-to-mid torque, higher speed capability). “3.000” = 3000 rpm rated speed. No suffix letter = No holding brake. Designed for moderate torque / high dynamic response axes — typical in smaller packaging, pick-place, or auxiliary machine axes. Compatible with Kollmorgen S300/S700 (240 V models) and AKD (120/240 V models with correct auto-tune).
Detailed content
Flange Size (Frame): 56 mm × 56 mm (sometimes designated NEMA 23 equivalent)
Shaft Diameter: 14 mm (typically with keyway on 6SM56)
Rated Speed (nN): 3000 rpm
Rated Torque (Continuous, Tc): ≈ 1.2 – 1.4 Nm (S-winding typical for 6SM56)
Peak Torque (Tp): ≈ 3.6 – 4.2 Nm
Rated Power: ≈ 0.4 – 0.44 kW
Rated Current (RMS): ≈ 1.8 – 2.5 A
Peak Current (RMS): ≈ 6 – 7.5 A
Torque Constant (Kt): ≈ 0.55 – 0.65 Nm/A
Back-EMF Constant (Ke): ≈ 35–45 V/krpm (line-to-line RMS)
Winding Resistance (Line-Line, 20 °C): ≈ 5 – 8 Ω
Winding Inductance (Line-Line): ≈ 8 – 15 mH
Rotor Inertia (without brake): ≈ 0.25 × 10⁻⁴ kg·m² (0.25 kg·cm²)
Brake: Not fitted
Feedback Device (Typical): 2-pole Resolver (standard 6SM); some units with incremental encoder — verify nameplate
Protection Class: IP54 / IP64 (sealed shaft; connector IP65 when mated)
Insulation Class: F (155 °C)
Cooling: Natural convection
Operating Temperature (Ambient): 0 °C to +40 °C; –20 °C to +55 °C with derating
Weight (approx.): ≈ 3.0 – 3.5 kg
Connector Type: Multi-pin circular (power + feedback)
Compliance: CE (legacy), cURus
Applicable Industries: Small packaging machines (indexing, cut-off), pick-and-place heads, lab automation stages, labeling heads, textile guide rollers
Installation Requirements: Mount on machined 56 mm flange with 4× M6 bolts; align load coupling to avoid excess overhung load (max radial typically 150 N at shaft end); bond PE; use shielded feedback cable.
Usage Notes: 6SM56S is a legacy model — verify voltage constant compatibility with drive DC bus; resolver feedback auto-commutated by modern Kollmorgen drives; if replacing with AKM series consider AKM2x/3x for direct mounting similarity; thermal time constant ~15–20 min — observe continuous torque limit in sustained duty.
