B2.SM.503-44B0 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB B2.SM.503-44B0 is a synchronous servo motor from the SM Synchronous Servo Motors series. It features a maximum speed of 10000 rpm and a maximum torque of 11.6 Nm, with a rated current of 2.75 A. The motor has a flange diameter of 75 mm and a shaft diameter of 14 mm.
Internal Product Review
The B2.SM.503-44B0 is a KEB synchronous servo motor with 2.37 Nm stall torque and 2.75 A rated current. A 10000 rpm max speed paired with 11.6 Nm max torque gives the motor strong dynamic capability for high-response motion axes. The KTY 84-130 winding sensor adds valuable thermal feedback, making the motor a very capable choice for precise servo applications.
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Product Description:
The B2.SM.503-44B0 is a synchronous servo motor built by KEB and assigned to the SM Synchronous Servo Motors series. It is intended for closed-loop motion axes that require rapid acceleration, accurate positioning, and repeatable speed control during frequent starts and stops. By converting electrical energy from a matched inverter into controlled shaft rotation, the motor serves as an actuator for assembly robots, pick-and-place gantries, and other automated equipment that depends on compact electronic commutation. Its synchronous design also allows the drive to regulate torque and rotor position closely on axes that must reverse direction quickly or hold a commanded path under changing load.
Under intermittent demand, the motor reaches a maximum mechanical speed of 10000 rpm, while the drive can call on up to 11.6 Nm of torque for short bursts before thermal limits intervene. Continuous operation is supported by a stall torque of 2.37 Nm, produced when the stator delivers its rated phase current of 2.75 A. The electromagnetic design has a back-EMF constant of 79.20 Vpk/1000 rpm, which helps match the motor to a compatible drive and bus voltage. With a phase inductance of 28.5 mH, the windings help smooth current ripple, while the 6.5 Ω phase resistance influences copper loss and servo response.
A square flange measures 75 mm across and uses a 60 mm pilot to align the housing concentrically with gearboxes or brackets. Four through holes, each 6 mm in diameter, accept standard fasteners for rigid attachment, and power is transferred through a ground steel shaft that is 14 mm in diameter and 30 mm long. The rotor carries 4 magnet pole pairs, so the inverter accounts for that pole count when setting electrical commutation. Temperature feedback comes from a KTY 84-130 sensor embedded in the windings, allowing the controller to reduce output if the motor temperature rises too far. The mounting geometry also supports direct integration into compact machine frames where concentric alignment and short coupling distance are important.
