B-106-A-21-E1 Kollmorgen
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The Kollmorgen B-106-A-21-E1 is a servo motor that belongs to the Goldline B and BH Motors series. It features a continuous stall torque of 2.20 N-m and a peak stall torque of 6.18 N-m. This motor offers IP65 ingress protection, a bayonet style connector, and a back EMF constant of 43.7 Vrms/kRPM.
Internal Product Review
The B-106-A-21-E1 is a Kollmorgen Goldline motor with IP65 protection and a bayonet-style connector. Continuous stall torque of 2.20 N-m and peak stall torque of 6.18 N-m give this unit strong low-speed drive capability. A torque constant of 0.723 N-m/Arms makes this motor a very capable choice for precise motion systems.
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Product Description:
The B-106-A-21-E1 servo motor is produced by Kollmorgen as part of the Goldline B and BH Motors series. Designed for closed-loop motion axes, the unit converts controlled armature current into mechanical rotation for packaging machinery, pick-and-place gantries, and similar industrial automation systems. The brushless design uses permanent-magnet field excitation, allowing high torque density in a compact frame and enabling direct coupling to gearboxes or belt drives.
During continuous operation, the stator can deliver 2.20 N-m of shaft torque while drawing 3 A rms. The winding has an inductance of 37.5 mH, which filters ripple from the drive’s pulse-width-modulated output. The back EMF constant is 43.7 V rms/krpm, a value servo amplifiers use to set voltage limits and velocity loops. A DC resistance of 6.5 Ω contributes to copper loss, and the thermal resistance to ambient is 0.87 °C/W. The connector terminals use a bayonet-latch configuration, and mating plugs are not included. An encoder adapter is included, allowing installation of a feedback device compatible with the connected controller.
Dynamic overload capability reaches 6.18 N-m at a peak winding current of 9 A rms, providing additional torque for acceleration. The electromagnetic design produces a torque constant of 0.723 N-m/A rms, allowing the drive to calculate commanded current from torque demand. The housing has an IP65 sealing grade, which protects the motor against airborne particles and water spray during washdown. A thermal time constant of 12 minutes indicates how quickly the winding temperature approaches a steady operating level. The motor includes a rear shaft extension that can accommodate an auxiliary encoder or brake. Its rotor inertia is 0.0000765 kg-m², supporting responsive acceleration and deceleration in servo applications.
