Product Description:

The B-402-B-A1-B2 is a brushless servo motor produced by Kollmorgen within the Goldline B and BH Motors series. The unit is intended for closed-loop industrial axes that require accurate velocity and position control during repeated starts, stops, and speed changes. As a brushless design, it works with a servo drive to produce controlled rotary motion for automated equipment. It uses standard metric mounting hardware and an IP65 housing, so the motor can operate in areas exposed to dust or low-pressure water spray without a separate protective enclosure.

This motor delivers a continuous line current of 6.4 A RMS, allowing the windings to sustain a continuous torque of 6.8 N-m at 40 °C. Under rated conditions, the shaft reaches 3000 rpm and converts 2.2 kW into mechanical output for steady rotary motion. That operating point suits applications that need consistent speed with enough power for routine conveying, indexing, or spindle duty. When short bursts of load appear, the motor can provide 19.8 N-m of peak torque, and the copper windings have a DC resistance of 2.60 Ω, which reflects steady-state I²R losses and helps match the motor to a suitable drive. A rear shaft extension is included for auxiliary encoders or couplings, and the connector side is supplied without mating plugs so cable terminations can be selected to suit the application.

A back-EMF constant of 67.2 VRMS/kRPM corresponds to the voltage generated as speed rises, while the three-phase inductance of 50 mH affects how quickly phase current can build during acceleration and reversal. The permanent-magnet brake draws 0.28 A at 90 VDC and provides 8.0 N-m of holding torque, which helps keep the axis stationary when power is removed. Rotor inertia is 0.000323 kg·m², which supports responsive bidirectional motion and helps the motor follow changing command profiles with limited overshoot. This combination of electrical response and brake holding capability is useful on axes that move often and must remain in place between cycles.