BL-MS75E-20T Okuma
Wake Industrial LLC is not an authorized distributor of this product.
The Okuma BL-MS75E-20T is part of the BL Servo Motors series and has a rated output of 1.5 kW with a rated current of 6.6 Arms. It features a 4-pole design with a current limit of 27.8 Amps and a winding resistance of 1.7 Ohms. An E/F type absolute position encoder with 2048 revolutions turnover is utilized for precise feedback, and the compatible servo drive capacity is 50 Amps.
Internal Product Review
The Okuma BL-MS75E-20T is a BL servo motor with 1.5 kW rated output and 6.6 Arms rated current. An absolute position encoder with 2048 rev turnover supports accurate feedback and dependable axis positioning. A 27.8 A current limit gives the motor strong transient capability, making this model a very capable choice for precise motion service.
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Product Description:
The BL-MS75E-20T is a servo motor produced by Okuma for the BL Servo Motors series. This permanent-magnet unit supplies rotational power to machine axes that require precise position, speed, and torque regulation in automated tool changers, material feeders, and similar CNC assemblies. A compact stator stack and an integrated encoder channel allow the motor to serve as the primary mechanical actuator, while the associated drive regulates the electrical input and processes feedback for closed-loop control. This arrangement supports controlled acceleration, accurate positioning, and stable operation as the mechanical load changes during a machine cycle.
The stator provides a continuous shaft output of 1.5 kW when the windings carry a steady-state current of 6.6 Arms. This output rating indicates the mechanical power available during sustained operation without relying on brief overload capacity. A four-pole rotor balances torque density with smooth commutation, while the copper phase coils have a line-to-line resistance of 1.7 Ω at 25 °C. The resistance affects winding losses and the amount of heat generated as current passes through the motor under load. Rotor position is reported by an integrated absolute position encoder, allowing the drive to recover the exact motor angle after a power cycle without requiring a homing sequence.
Peak motor current is limited to 27.8 A by the thermal capacity of the windings and internal motor components. The matching amplifier in the 50D family can supply up to 50 A of phase current, providing sufficient capacity for short acceleration demands before the axis settles at its rated load. This available current reserve helps the servo system respond quickly when the machine command requires a rapid change in torque or speed. The encoder maintains multi-turn absolute position tracking across 2048 shaft revolutions, allowing the control system to monitor long-range movement without losing the motor’s rotational count. Its E/F Type signal format is compatible with Okuma BL-series servo drives and supports direct feedback wiring between the motor and its associated controller.
