BL-MP400J-20SNA Okuma
Wake Industrial LLC is not an authorized distributor of this product.
The Okuma BL-MP400J-20SNA is an AC servo motor from the BL Servo Motors series. It is a permanent magnet, 3-phase motor with a continuous output of 6.7 kW and a rated speed of 2000 RPM. The motor features a stall torque of 45.8 Newton-meters and has a rated current of 40.8 Amps at 143 Volts.
Internal Product Review
The BL-MP400J-20SNA is an Okuma AC servo motor with a permanent magnet field design, making the unit a strong choice for precision motion applications. Rated for 6.7 kW continuous output and 45.8 N·m stall torque, the motor shows excellent load-handling capability and stable servo response. A 3-phase configuration with 2000 RPM rated speed supports smooth integration and dependable machine performance.
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Product Description:
The BL-MP400J-20SNA belongs to the BL Servo Motors series manufactured by Okuma. It is an AC servo motor designed for closed-loop axis control in CNC machining centers, pick-and-place modules, and other motion platforms that require precise positioning and sustained torque delivery. When paired with a compatible Okuma drive, the motor converts command signals into controlled rotational motion and supplies the feedback needed to correct changes in position, speed, or load. This closed-loop operation supports accurate movement during machining, material handling, and other automated processes.
The unit delivers a continuous mechanical output of 6.7 kW, allowing cutters, tables, or actuators to maintain their loads without overheating the motor. At a rated shaft speed of 2000 rpm, that output supports stable operation over prolonged duty cycles, while a stall torque of 45.8 N·m helps the motor respond to momentary overloads or rapid axis reversals. Electrical demand during normal operation reaches 40.8 A, which must be considered when selecting conductors, drive components, and overcurrent protection. The power stage supplies the stator with 143 V at the motor terminals. This voltage matches the winding requirements and allows the drive to regulate current efficiently as the commanded torque changes.
The servo is wired as a three-phase motor and contains 8 magnetic poles, a combination that supports smooth torque delivery for controlled machine movement. The stator operates at a rated electrical frequency of 133 Hz, which corresponds to the motor’s rated operating point and keeps the rotating magnetic field synchronized with rotor motion. A permanent-magnet field structure eliminates the need for rotor excitation windings, reducing rotor inertia and improving acceleration response. Lower inertia allows the shaft to react quickly when the drive commands a change in speed or direction. The motor can therefore maintain controlled torque at low speed and respond rapidly as an axis advances toward its next position.
