B-204-B-23-B3 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen B-204-B-23-B3 is part of the Goldline B and BH Motors series and has a shaft diameter of 14 mm with a length of 30 mm. This motor provides a continuous stall torque of 4.47 N-m and a brake torque of 6.0 N-m. It features a back EMF constant of 51.2 Vrms/kRPM, operates with a maximum line voltage of 250 Vrms, and includes a 24 VDC brake.
Internal Product Review
The B-204-B-23-B3 is a Kollmorgen Goldline servo motor with an integrated 24 VDC brake and 6.0 N-m brake torque. Continuous stall torque of 4.47 N-m and a torque constant of 0.848 N-m/Arms give this motor strong low-speed holding performance and efficient current-to-torque response.
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Product Description:
The B-204-B-23-B3 is a servo motor from Kollmorgen, supplied within the Kollmorgen Goldline B and BH Motors series. It is built for closed-loop motion axes that require midrange torque and the ability to hold position when power is removed through an integrated electromagnetic brake. In automated cells, the unit can couple directly to precision gearheads or belt stages, converting drive current into rotational motion for pick-and-place heads, indexing tables, and similar equipment.
This motor produces a continuous stall torque of 4.47 N·m, allowing it to maintain a load at zero speed without overheating. Torque is proportional to phase current according to a torque constant of 0.848 N·m/Arms, so a compatible drive can calculate output from current feedback. A back-EMF constant of 51.2 Vrms/kRPM indicates the voltage generated by the stator as the shaft rotates, which the inverter must overcome during acceleration. Dynamic response is influenced by a rotor inertia of 0.000173 kg·m²; this relatively low inertia permits fast speed changes without excessive drive effort. The winding has an inductance of 38 mH, which affects the current rise time. Its DC resistance is 2.48 Ω, which contributes to copper losses under load.
The holding brake supplies a static torque of 6.0 N·m and operates from 24 VDC, preventing back-driving when the axis is stationary. Brake actuation draws 1.27 A and adds 40.3 mm to the overall motor length without changing the 92 mm outside diameter. Electrical operation supports a maximum drive line input of 250 Vrms, making the motor suitable for systems powered from standard 240 V three-phase mains. The motor also has a four-pole rotor and a 14 mm shaft that extends 30 mm beyond the front flange, while the brake adds 0.00000247 kg·m² of inertia to the rotating assembly.
