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Kollmorgen B-206-C-21-033
Product Classification: Frameless Brushless DC Torque Motor
Product Overview:
The B-206-C-21-033 is a frameless torque motor from the B-Series with an incremental encoder (“21” = incremental encoder variant) and a specific winding configuration (“C”). The “033” suffix indicates a particular torque/speed rating.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Series | B-Series (Frameless) |
| Part Number | B-206-C-21-033 |
| Outer Diameter | 152.4 mm (6.00 in) |
| Inner Diameter (Bore) | 76.2 mm (3.00 in) |
| Stack Length | 50.8 mm (2.00 in) |
| Continuous Torque | 2.26 Nm (20.0 lb-in) |
| Peak Torque | 6.78 Nm (60.0 lb-in) |
| Continuous Speed | 2,500 RPM |
| Max Speed | 6,000 RPM |
| Voltage Constant (Ke) | 2.57 V/krpm |
| Torque Constant (Kt) | 24.5 mNm/A |
| Terminal Resistance (Rt-t) | 1.6 Ω |
| Terminal Inductance (Lt-t) | 2.8 mH |
| Thermal Resistance (Rth) | 2.8 °C/W |
| Weight | 3.1 kg (6.8 lb) |
| Winding Configuration | 3-Phase, Y-connected |
| Encoder Option | Incremental (21 = incremental variant) |
| Encoder Resolution | 2,500 lines/rev (21-bit variant typical) |
| Insulation Class | Class H (180°C) |
| Bearing Type | None (customer-supplied) |
Structural Features:
- Frameless design: Stator and rotor only
- Larger stack length (50.8 mm) compared to B-606 for higher torque
- Incremental encoder — requires external counter/interface
- NdFeB magnets for high energy product
Applicable Industries:
- Direct-drive rotary tables
- Turret indexing
- Antenna positioning
- Semiconductor equipment
- Medical scanners
Installation Requirements:
- Press-fit stator into customer housing
- Precision-balanced rotor
- Cross-roller or angular contact bearings required
- Thermal interface between stator and housing mandatory
Usage Notes:
- Incremental encoder requires external line driver (Kollmorgen RD-series recommended)
- Do not disassemble — SmCo/NdFeB magnets are brittle
- Max continuous temperature: 130°C (winding), 150°C (magnet for SmCo)
