BAUMÜLLER BM4423-ST1-022 00-03 Synchronous Servo Motor
Product Introduction:
The BAUMÜLLER BM4423-ST1-022 00-03 is a customized 4-pole (2 pole pair) servo motor from the BM4423 series with dual radial shaft seals, a keyed shaft, natural convection cooling, and customer-specific modification code 00-03. This variant targets high-speed, medium-torque applications with enhanced environmental sealing.
Detailed content
Cooling Method: Natural Convection (S)
Shaft Configuration: Keyed Shaft with Dual Radial Shaft Seals (T)
Electrical Connection: Rotatable Connector (1) — M23, 360° rotation.
Pole Configuration: 022 = 2 Pole Pairs (4 Poles) — High-speed, medium-torque optimized.
Frame Size: 230 mm Flange Diameter
Motor Length Code: 23 (Medium Length) — Approximately 280 mm overall length.
Rated Torque: Approximately 10–16 Nm
Peak Torque: Up to 3× Rated Torque
Rated Power: Approximately 3.5–5.5 kW
Maximum Rated Speed: Up to 4500 rpm
Protection Class: IP65 (dual shaft seals)
Insulation Class: Class F (155°C)
Ambient Temperature Range: -10°C to +40°C (continuous)
Housing Material: Aluminum Alloy Die-Cast (ADC12)
Stator Lamination: 0.35 mm Silicon Steel (Grain-Oriented)
Rotor Magnets: Sintered NdFeB N42SH Grade
Bearings: Deep Groove Ball Bearings (C3 Clearance, Both Ends)
Shaft Material: Induction-Hardened C45E (1.0503)
Shaft Diameter: 42 mm or 55 mm
Keyway: DIN 6885-1 Form A
Weight: Approximately 32–40 kg
Moment of Inertia: Approximately 0.018–0.038 kg·m²
Custom Code 00-03: BAUMÜLLER internal customer-specific modification identifier — Denotes particular mechanical or electrical customizations applied to the BM4423-ST1-022 base.
Encoder Options: Per customer specification defined in 00-03 code — typically incremental HTL or absolute EnDat 2.2
Standards Compliance: EN 60034-1, EN 60034-5, EN 61800-5-1, CE
Applicable Industries: High-Speed Spindles, CNC Machining, Packaging, Textile Machinery, Printing — with custom modifications per 00-03
Key Advantages:
- 4-pole design (022) provides balanced high-speed performance with adequate torque
- Dual shaft seals (T) — superior IP65 protection from both shaft ends
- Custom code 00-03 provides application-specific optimization
- Natural convection — silent operation, zero fan maintenance
- Rotatable connector — flexible installation in confined spaces
Installation Requirements:
- B5 flange mounting — 4× M10, 210 mm PCD.
- Verify dimensions against 00-03 modification drawing before installation.
- Minimum 150 mm clearance around housing for cooling.
- Coupling alignment: ≤0.05 mm TIR.
Operating Notes:
- Refer to 00-03 documentation for any modified limits.
- Standard BM4423-ST1-022 operating parameters apply unless 00-03 specifies deviations.
- Shaft seals require inspection every 6000 operating hours.












