BL-ME120J-40TBA Okuma
Wake Industrial LLC is not an authorized distributor of this product.
The Okuma BL-ME120J-40TBA is a 3-phase servo motor from the BL Servo Motors series with a continuous duty rating and a permanent magnet field. It provides an output power of 3.0 kW, operates at 159 volts with a current of 14.6 amps, and has a stall torque of 12 Newton meters.
Internal Product Review
The BL-ME120J-40TBA is an Okuma BL servo motor with 3.0 kW output power and a 3-phase design. Continuous duty and a permanent magnet field support stable torque production and efficient servo response in demanding motion applications. A 12 N·m stall torque makes the unit a strong choice for consistent positioning performance.
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Product Description:
The BL-ME120J-40TBA is a three-phase AC servo motor built by Okuma within the BL Servo Motors series. Industrial machine tools rely on this unit for closed-loop positioning, speed regulation, and rapid acceleration of machine axes or spindles. In automated cells, the compact motor converts drive commands from a matching amplifier into precisely metered torque, allowing the controller to synchronize multiple axes under one program. Its permanent-magnet rotor and encoder interface help the motor achieve high dynamic stiffness while keeping thermal losses low.
The rated line current is 14.6 A, so the selected amplifier must supply this continuous current without derating. The winding has a nominal terminal voltage of 159 V; this relatively low value suits Okuma’s internal DC bus architecture and limits insulation stress. Connections are wired in a three-phase configuration, ensuring balanced power delivery and smooth torque production throughout the electrical cycle. Under these conditions, the shaft can deliver up to 3.0 kW, providing adequate output for medium-frame lathes or machining centers. When motion is arrested, the motor provides a stall torque of 12 N·m, giving the axis sufficient holding capability during cutting passes or clamping functions.
The motor is rated for continuous duty under IEC duty-cycle classifications, allowing sustained operation at its rated load without enforced cooling periods. Torque is produced by a permanent-magnet field rotor, which eliminates rotor excitation losses and improves the response to command changes. Compliance with IEC 60034-1 supports integration with standard protection methods and test procedures. The compact housing is suitable for automated machine-tool installations where available mounting space may be limited. Closed-loop feedback allows the connected drive to correct changes in speed and position as machining loads vary. Balanced three-phase power also helps reduce torque pulsation during steady operation and controlled acceleration.
