BL-MC75E-20TB Okuma
Wake Industrial LLC is not an authorized distributor of this product.
The Okuma BL-MC75E-20TB servo motor is part of the BL Servo Motors series and features a continuous duty rating. It has a rated power of 1.5 kW, operates at a rated speed of 2000 RPM, and a rated voltage of 133 V. The motor has 8 poles and provides a stall torque of 8.1 newton-meters.
Internal Product Review
The BL-MC75E-20TB is an Okuma BL servo motor engineered for continuous-duty motion control with 1.5 kW rated power. An 8-pole design paired with 2000 RPM rated speed supports smooth torque production and stable axis response. Strong low-speed performance stands out, especially with 8.1 N·m stall torque.
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Product Description:
The BL-MC75E-20TB is a brushless servo motor produced by Okuma for the BL Servo Motors series. Intended for cross-slide and spindle-orientation duties on CNC machine tools, it combines a permanent-magnet rotor with high-resolution feedback so the control loop can command exact velocity and position during continuous production cycles. Its compact flange and through-shaft configuration allow direct mounting to mechanical loads, eliminating belt or gear transmission backlash in automated assemblies. This direct mechanical connection improves positional repeatability when the motor controls a feed axis or rotary fixture.
The unit carries a continuous-duty rating, meaning it can maintain thermal equilibrium under its rated electrical load without scheduled cooling periods. It is energized from a DC link of 133 V, a relatively low voltage that limits insulation stress and simplifies the drive power supply. At that voltage, the stator windings draw 6.8 A to establish the magnetic field required for synchronous rotation. Under these electrical conditions, the shaft reaches 2000 rpm, making the motor suitable for ball-screw feeds that require moderate linear velocities. The matching servo amplifier must provide the required voltage and current continuously while controlling acceleration, deceleration, and steady-speed operation.
Mechanical output reaches 1.5 kW, enabling the motor to move medium-mass tables or rotary fixtures without external reduction. A stall torque of 8.1 N·m supplies the holding force needed to counter cutting loads at zero speed. The motor uses an 8-pole rotor, providing a balance between torque density and smooth rotation. Rotor position is reported to the controller by the ER-FC-2048D incremental encoder, which outputs 2048 counts per revolution for precise interpolated feedback. The encoder allows the control system to monitor shaft movement and correct position or velocity errors during operation. In integrated machining centers, these electrical, mechanical, and feedback characteristics support coordinated multi-axis paths for contouring, drilling, and positioning tasks.
