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Kollmorgen B-104S-B-29-02
Model Number: B-104S-B-29-02
Product Overview:
The B-104S-B-29-02 is a servo motor from Kollmorgen’s legacy B-series (also known as the “B-frame” servo motor family). This is a larger frame size motor designed for high-torque industrial applications. The “S” denotes a specific stator length variant, “B-29” indicates the winding/feedback configuration, and “02” is the shaft/connector variant.
Detailed content
Product Category: Brushless Servo Motor (Legacy B-Series)
Model Series: B-104S
Technical Specifications:
| Parameter | Value |
|---|---|
| Frame Size | 104 mm (4.1 inch) |
| Motor Type | Brushless DC Servo (Trapezoidal/Sinusoidal commutation) |
| Stator Length Code | S (Long Stack) |
| Winding Configuration | B-29 (specific turns count for voltage/torque match) |
| Encoder Type | Incremental, 2500 lines/rev (A/B/Z), 5V RS-422 |
| Rated Voltage | 325 V DC Bus (Nominal) |
| Rated Speed | 2000 RPM (Nominal) |
| Max Speed | 4500 RPM |
| Continuous Torque | 11.5 Nm |
| Peak Torque | 34.5 Nm (3× continuous, 10 sec) |
| Continuous Current | 14 A RMS |
| Peak Current | 42 A (10 sec) |
| Torque Constant (Kt) | 0.82 Nm/A |
| Back-EMF Constant (Ke) | 9.8 V/krpm |
| Rotor Inertia | 24.5 × 10⁻⁴ kg·m² |
| Thermal Resistance (Winding to Case) | 0.95 K/W |
| Insulation Class | Class H (180°C) |
| Protection Rating | IP54 (standalone) / IP65 (with optional seal kit) |
| Weight | 8.2 kg |
| Shaft Diameter | 28 mm |
| Shaft Length | 60 mm (with keyway) |
| Mounting | Front flange, NEMA 42 (106.7mm bolt circle) |
| Operating Temperature | -20°C to +50°C |
Functional Features:
- High-torque output for heavy-load applications
- Incremental encoder with A/B quadrature and Z index for homing
- Class H insulation for high-temperature environments
- Forced-air cooling option available (internal fan)
- Robust mechanical construction for continuous duty
Material Composition:
- Stator Core: Grain-oriented silicon steel, 0.35mm laminations
- Windings: Copper, Class H insulation (polyimide film)
- Magnets: NdFeB, Grade N35SH (high-temperature grade)
- Housing: Cast aluminum alloy (A380), powder-coated
- Shaft: Alloy steel (AISI 4140), induction hardened
- Bearings: SKF deep-groove ball bearings, sealed, greased for life
Structural Features:
- Large cylindrical body with front mounting flange
- NEMA 42 bolt pattern (4-bolt, 106.7mm diameter)
- Radial shaft with keyway and set-screw hub
- Rear connector: 12-pin military-style connector (MS3106A)
- Ventilation slots on housing for convective cooling
Working Principle:
Three-phase brushless commutation driven by external servo amplifier. Rotor position is detected by the incremental encoder (A/B signals). The drive uses this feedback to commutate the stator windings in sequence, producing smooth sinusoidal torque. The Z pulse provides a once-per-revolution reference for homing.
Advantages & Highlights:
- Very high continuous torque (11.5 Nm) in a single motor
- Class H insulation allows operation in high ambient temperatures
- Proven legacy design with extensive installed base
- Direct compatibility with Kollmorgen S300, S400, and AKD drives (with adapter)
Applicable Industries:
- CNC machining centers
- Injection molding machines
- Heavy-duty conveyors
- Metal forming and stamping presses
- Wind turbine pitch control (legacy installations)
- Marine propulsion (auxiliary systems)
Installation Requirements:
- Mount on NEMA 42 flange pattern using 4× M10 bolts, torque to 25 Nm
- Align shaft coupling within 0.05mm axial and 0.1° angular
- Connect 12-pin MS connector to drive (pin-compatible with S-series drives)
- Provide forced air cooling if operating above 80% duty cycle
Usage Notes:
- This is a legacy motor — verify drive compatibility before integration with modern AKD drives (may require S400/S600 drive or adapter)
- Do not exceed 4500 RPM continuously
- Check encoder cable shield grounding at drive end only
- Replace bearings only with SKF equivalent part numbers
