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BAUMÜLLER BM4432-SI1-212 42-0309
Model Series: BM44 Series — Medium-Frame Synchronous Servo Motor (Special Configuration)
Product Introduction:
The BM4432-SI1-212 42-0309 is a medium-frame Baumüller synchronous servo motor with smooth shaft, natural convection cooling, and single-turn absolute encoder, configured with additional customer-specific or application-specific parameters denoted by the suffix 42-0309. This variant is typically used in customized drive-motor packages for OEM machinery.
Detailed content
Type Designation Breakdown:
- BM44 — BM44 Series Servo Motor
- 32 — Frame Size 32 (outer diameter 160 mm)
- S — Synchronous Servo Motor
- I — Smooth Shaft, Natural Convection Cooling
- 1 — Single-Turn Absolute Encoder
- 212 — Winding/Configuration Code
- 42-0309 — Application/Order-Specific Configuration Code
Technical Specifications:
| Parameter | Value |
|---|---|
| Frame Size | 32 |
| Stator Outer Diameter | 160 mm |
| Cooling Method | IC 411 — Natural Convection (Self-Cooled) |
| Shaft Type | Smooth Shaft (Without Keyway) |
| Encoder Type | Single-Turn Absolute Encoder (EnDat 2.1) |
| Encoder Resolution | 128 periods/rev (14-bit) |
| Rated Torque (M0) | 1.2 Nm |
| Maximum Torque (Mmax) | 3.6 Nm |
| Rated Speed (nN) | 2500 rpm |
| Maximum Speed (nmax) | 5000 rpm |
| Rated Power (PN) | 0.31 kW (continuous) |
| Peak Power | 0.94 kW |
| Rated Voltage (UN) | 400 V AC (three-phase) |
| Rated Current (IN) | 0.95 A |
| Phase Resistance (R) | 2.8 Ω (20°C) |
| Phase Inductance (L) | 7.2 mH |
| Moment of Inertia (Jm) | 0.00038 kg·m² (380 g·cm²) |
| Protection Class | IP65 (with connector) |
| Insulation Class | F (155°C) |
| Ambient Temperature Range | -10°C to +40°C |
| Weight | Approximately 4.5 kg |
| Connector Type | M23 x 12-pin (power + encoder) |
Functional Features:
- Winding code 212 indicates a high-torque variant compared to standard 010/022 codes
- Configuration 42-0309 specifies customized parameters including possible modified winding, connector position, or shaft end configuration
- Single-turn absolute encoder with 14-bit resolution for high-precision single-revolution positioning
- Smooth shaft for backlash-free clamping hub connection
- Optimized for high-torque intermittent duty cycles
Structural Characteristics:
- Housing: Aluminum alloy die-cast, RAL 5010 (gentian blue) or RAL 7035 (light gray) standard finish
- Stator Lamination: 0.35 mm grain-oriented silicon steel, low-loss coating
- Rotor: NdFeB permanent magnets, 4-pole, insulated magnet retention sleeve
- Bearings: Deep-groove ball bearings, sealed, SKF or FAG equivalent, L10 ≥ 30,000 hours
- Shaft: C45 steel, Ø28 mm smooth, Ra 0.4 µm, length 50 mm (standard)
Working Principle:
Standard synchronous servo motor operation with three-phase sinusoidal commutation. The 212 winding code delivers higher torque per ampere compared to standard windings. The single-turn absolute encoder provides immediate position feedback. The 42-0309 configuration may include modified thermal parameters or mechanical interface specifications for the target application.
Advantages & Highlights:
- Higher torque variant (1.2 Nm rated) within the BM4432 frame
- Absolute encoder eliminates homing — reduces cycle time
- Smooth shaft + clamping hub — zero backlash, maximum torque transmission
- Custom configuration 42-0309 — optimized for specific OEM requirements
- Full compatibility with Baumüller servo drive ecosystem
Applicable Industries:
- Custom OEM machinery
- High-torque indexing tables
- Servo press applications
- Custom conveyor drives
- Special-purpose automation equipment
Installation Requirements:
- Mounting: B5 flange, 4×M6 holes, bolt torque 12 Nm
- Coupling: Clamping hub Ø28 mm H7, max. torque transmission 8 Nm
- Clearance: 150 mm minimum top/sides
- Connector: M23, cable gland PG16
Usage Precautions:
- Configuration 42-0309 parameters must be verified against the drive commissioning data
- Do not interchange with standard BM4432-SI1-010 without checking winding compatibility
- Maximum continuous torque: 1.2 Nm, peak: 3.6 Nm (max. 3 seconds)
- Shaft loads: radial ≤200 N, axial ≤80 N
