Product Description:

The B-104-B-32 is a brushless servo motor built by Kollmorgen for the Kollmorgen Goldline B and BH Motors series. The unit converts electrical input from a matched drive into controlled rotary motion for positioning, velocity regulation, and tension control tasks in industrial automation lines. Designed for closed-loop operation, it delivers repeatable torque across a wide speed range and fits compact machinery where accurate shaft movement is required. Its compact form also suits axes that need responsive motion without the bulk of a larger motor frame.

The motor can deliver a continuous line current of 4.20 A RMS and a continuous stall torque of 1.57 N-m. Its inductance is 14.4 mH, which helps moderate current rise during commutation, while the winding resistance is 2.72 Ω at 25 °C. Bayonet connectors let the power and feedback cables lock securely and maintain reliable electrical contact during operation. Thermal resistance is 1.07 °C/W, so the housing temperature rises in a predictable way when heat is dissipated under free-air cooling. The motor is supplied without a front shaft seal, which makes it better suited to clean, dry environments where liquid exclusion at the bearing is not required.

The back EMF constant is 22.5 VRMS/kRPM, and the maximum speed is 7500 RPM. The torque constant is 0.37 N-m/A RMS, so the motor converts drive current into torque efficiently, and it can draw a peak line current of 12.6 A RMS during short acceleration periods. Peak torque reaches 4.45 N-m, while the rotor inertia of 0.0000461 kg·m² supports quick response and short settling time on light moving loads. The winding insulation can withstand up to 250 VRMS, and the motor has a mass of 3.2 kg. That low mass helps when the motor is mounted on smaller gantries, indexing units, or end-of-arm assemblies where added weight can reduce dynamic performance.