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Kollmorgen B-604-BW-91-TB
Product Introduction:
The B-604-BW-91-TB is a brushless AC servo motor from Kollmorgen’s B-Series with a 60 mm frame, high-speed (BW) winding, and long stack (91) for extended speed range. The “TB” shaft configuration features a threaded shaft with locking collar (clamp-style) — enabling direct mounting of pulleys, timing belts, or couplings with a clamping collar, eliminating the need for a separate key and keyway. This motor is optimized for high-speed, moderate-torque applications such as spindle drives, conveyor rollers, and high-RPM indexing.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Frame Size | 60 mm (B-604) |
| Stack Length | 91 (Long) |
| Winding Code | BW (High-Speed) |
| Shaft Type | TB (Threaded + Locking Collar) |
| Rated Voltage | 48 VDC (Bus) |
| Continuous Torque | 2.2 Nm (Nominal) |
| Peak Torque | 6.6 Nm (3× continuous) |
| Max Speed | 6,000 RPM |
| Torque Constant (Kt) | ~0.20 Nm/A |
| Back-EMF Constant (Ke) | ~1.9 V/krpm |
| Phase Resistance | ~0.8 Ω |
| Phase Inductance | ~0.45 mH |
| Rotor Inertia | ~15 g·cm² |
| Weight | ~1.6 kg |
| Insulation Class | Class H (180°C) |
| IP Rating | IP65 (with connector) |
| Operating Temperature | -20°C to +85°C |
| Feedback | Resolver (Standard) |
Functional Features:
- BW (High-Speed) winding optimized for maximum RPM with lower torque constant
- Long stack (91) provides more copper fill for improved thermal performance at speed
- Threaded shaft with locking collar (TB) — clamp-style mounting for zero-backlash coupling
- Integrated resolver for absolute position feedback
- Skewed rotor magnets for smooth high-speed operation with minimal cogging
Structural Features:
- Stator: 48-slot laminated silicon steel, epoxy potted
- Rotor: NdFeB magnets, surface-mounted for high-speed capability
- Housing: 6061-T6 Anodized Aluminum
- Shaft: 416 Stainless Steel, 12 mm diameter, M5×0.8 thread
- Connector: MIL-DTL-5015 14-pin circular connector
Advantages:
- 6,000 RPM max speed — ideal for high-speed spindle and conveyor applications
- Locking collar shaft provides fast, repeatable mounting without keyway machining
- High-speed winding delivers optimal efficiency at elevated RPMs
- IP65 sealed for dust and splash protection
Applicable Industries:
- High-speed spindles (milling, grinding)
- Conveyor roller drives
- Textile spinning and winding
- Printing press rollers
- Packaging machine turret drives
Installation Requirements:
- Mount using 4-bolt flange (front or rear)
- Torque flange bolts to 4.0 Nm
- For TB shaft: slide locking collar onto shaft, position component, tighten collar set screw to 3.0 Nm
- Verify <0.02 mm TIR at coupling interface
Usage Notes:
- Do not exceed 6,000 RPM under any condition
- Locking collar must be torqued to spec — insufficient torque causes slippage at high speed
- Use Loctite 641 on collar set screw thread for vibration resistance
