B-404-C-B4-B3 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen B-404-C-B4-B3 is part of the Goldline B and BH Motors series and has a rated speed of 5000 RPM with a rated torque of 10.31 N-m. This motor provides a continuous stall current of 19.8 Arms and a peak stall torque of 35.3 N-m. It features a back EMF constant of 40.2 Vrms per kRPM and comes with included mating plugs.
Internal Product Review
The B-404-C-B4-B3 is a Kollmorgen Goldline servo motor with a rated speed of 5000 RPM and rated torque of 10.31 N-m. Continuous stall torque of 13.1 N-m and peak stall torque of 35.3 N-m give the unit excellent low-speed authority and strong transient response. A 24 VDC brake with 8.0 N-m holding torque makes the package especially appealing for precise positioning and secure load holding.
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Product Description:
The B-404-C-B4-B3 servo motor is manufactured by Kollmorgen and belongs to the Kollmorgen Goldline B and BH Motors series. As a brushless AC unit, it is intended for precision positioning and velocity control in industrial automation systems such as packaging lines, pick-and-place robots, and CNC axes. Its frame integrates a permanent-magnet rotor and a stator winding optimized for rapid response, allowing the motor to translate drive commands into controlled mechanical torque across a wide speed range.
The motor develops a rated shaft speed of 5000 rpm under nominal load. At that speed, it can deliver a rated torque of 10.31 N-m, matching midrange motion tasks that demand steady force without overheating. A torque constant of 0.66 N-m/Arms links drive current to output torque, allowing the drive to predict load behavior by monitoring phase current. Electrical voltage produced during rotation is characterized by a back-EMF constant of 40.2 Vrms/krpm, which the servo amplifier uses to regulate commutation and manage regenerated energy. Under stall conditions, the winding can sustain a continuous current of 19.8 Arms, enabling the motor to hold position against static loads while remaining within its thermal limits. Additional parameters include a DC resistance of 0.34 Ω and a peak stall torque of 35.3 N-m. Included mating plugs support the required drive and motor cable connections.
A normally off holding brake supplies 8.0 N-m of static torque and operates from 24 VDC. The brake prevents back-driving on vertical axes when the drive is disabled, and its current requirement is 0.93 A. The motor has an inductance of 8.4 mH, which moderates current ripple and supports smooth torque production during rapid command changes. Mechanical responsiveness benefits from a rotor inertia of 0.000656 kg-m², allowing quick acceleration without excessive overshoot. The motor has no front or rear shaft seals, simplifying connection to gearheads or pulleys in clean operating environments.
