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BAUMÜLLER BM4423-SI1-022 Synchronous Servo Motor

Product Introduction:
The BAUMÜLLER BM4423-SI1-022 is a high-performance permanent magnet synchronous servo motor from the BM4423 product family. This motor is engineered for precision motion control applications requiring high dynamic response, exceptional torque density, and reliable continuous operation in industrial automation environments.

Detailed content

Cooling MethodNatural Convection (S) — Self-cooling via external housing surface without auxiliary fans.

Shaft Configuration: Keyed Shaft with Radial Shaft Seal (I) — Features a standard DIN 6885-1 keyway and a single radial lip seal on the drive end for protection against dust and moisture ingress.

Electrical Connection: Rotatable Connector (1) — Equipped with a M23 rotatable plug connector allowing 360° rotation for flexible cable routing.

Pole Configuration: 022 = 2 Pole Pairs (4 Poles) — Designed for high-speed operation with a maximum rated speed up to 6000 rpm.

Frame Size230 mm Flange Diameter

Motor Length Code23 (Medium Length) — Overall motor length approximately 280 mm (excluding shaft).

Rated Torque: Approximately 10–16 Nm (dependent on winding variant)

Peak TorqueUp to 3× Rated Torque for short-duration overload conditions.

Rated Power: Approximately 3.5–5.5 kW (at rated speed)

Protection Class: IP65 (with shaft seal installed) — Complete protection against dust ingress and protection against low-pressure water jets from all directions.

Insulation ClassClass F (155°C) — Allows for high thermal endurance and extended motor life under continuous duty cycles.

Ambient Temperature Range: -10°C to +40°C (continuous operation); up to +55°C for short-term operation.

Housing Material: Aluminum Alloy Die-Cast Housing (ADC12) — Provides excellent thermal conductivity, lightweight construction, and high mechanical rigidity.

Stator LaminationSilicon Steel Sheets (0.35 mm thickness) — Low-loss electrical steel for minimized iron losses and high efficiency.

Rotor Construction: Permanent Magnet Rotor with Neodymium (NdFeB) Magnets — High-energy rare-earth magnets for maximum torque per unit volume.

Bearings: Deep Groove Ball Bearings (Drive End) + Deep Groove Ball Bearings (Non-Drive End) — Precision-grade bearings rated for high-speed operation.

Shaft Material: Case-Hardened Steel (C45E / 1.0503) — Induction-hardened surface for superior wear resistance at the keyway and seal contact zones.

WeightApproximately 28–35 kg (depending on exact configuration)

Moment of InertiaApproximately 0.015–0.035 kg·m² (dependent on pole/winding variant)

Encoder CompatibilityOptional incremental or absolute encoder mounting on non-drive end (standard IM B5 flange mounting with encoder flange option).

Standards Compliance: EN 60034-1, EN 60034-5, EN 61800-5-1, IEC 60034

Applicable Industries: CNC Machining Centers, Packaging Machinery, Printing Presses, Robotics, Textile Machinery, Material Handling Systems, Plastic Processing Equipment

Key Advantages:

  • High torque density due to optimized electromagnetic design
  • Low cogging torque for smooth low-speed operation
  • Compact design with 230 mm flange for space-constrained installations
  • Natural cooling eliminates fan noise and reduces maintenance
  • Keyed shaft with seal ensures direct mechanical coupling with environmental protection

Installation Requirements:

  • Mount on a rigid, vibration-damped base using B5 flange mounting with 4× M10 mounting holes on 210 mm bolt circle.
  • Ensure shaft alignment within 0.05 mm TIR to prevent premature bearing wear.
  • Use flexible coupling to accommodate minor misalignment (angular: ≤1°, axial: ≤0.5 mm, radial: ≤0.3 mm).

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