BL-MC50E-20TB Okuma
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The Okuma BL-MC50E-20TB is part of the BL Servo Motors series and has an output power of 1 kW with a rated speed of 2000 rpm. This 3-phase motor operates at a supply voltage of 133 V and a current of 4.45 A. It is equipped with an ER-FC-2048D encoder, features a tapered shaft style, and has a stall torque of 5.4 Newton-meters.
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Product Description:
The BL-MC50E-20TB servo motor is produced by Okuma within the BL Servo Motors series. This unit is intended for closed-loop axis drives in machine tools and automated cells where consistent speed and position control are required. Paired with an ER-FC-2048D incremental encoder, it supplies high-resolution feedback to the drive controller for precise interpolation of path commands. Its electrical and mechanical profile suits mid-range spindles or feed axes that demand moderate continuous power while keeping the frame size compact.
The motor windings accept a supply of 133 V, and this voltage sets the back electromotive force level that the connected amplifier must overcome during operation. Continuous mechanical output reaches 1 kW, providing enough power for medium-duty cutting, indexing, or transfer motions without requiring an oversized drive cabinet. At the rated shaft speed of 2000 rpm, the rotor delivers this output while drawing 4.45 A of current, allowing cables and protective devices to be selected for the expected electrical load. The stator uses three-phase excitation, allowing the drive to generate a rotating magnetic field with smooth torque and low vibration.
The electrical commutation frequency reaches 133 Hz, corresponding to the cycles needed to sustain the rated mechanical speed when combined with the motor’s pole count. The motor can generate 5.4 N·m of stall torque, enabling the axis to resist cutting forces or static loads until motion resumes. The rotor uses an 8-pole assembly, which reduces torque ripple and keeps electronic timing compatible with standard Okuma amplifiers. A tapered shaft simplifies rigid coupling to precision gearboxes or pulleys by providing a self-centering fit that helps maintain alignment during repeated load cycles.
