Product Description:

The BL-MC150J-20SB is a servo motor produced by Okuma as part of its BL Servo Motors series. It converts electrical energy into controlled rotary motion for positioning and speed-regulated tasks in CNC machinery and other industrial automation platforms. The motor uses a permanent-magnet rotor and a three-phase stator winding so that it can deliver precise torque response under digital drive control. Its J control type allows the matching Okuma amplifier to recognize winding constants without manual parameter entry, reducing setup steps on multi-axis systems.

The stator is wound for three-phase operation and is rated at 133 V, allowing it to interface directly with Okuma BL servo drives that use the same bus voltage. Under continuous loading, the motor can deliver 3.0 kW of mechanical output, a rating tied to its thermal design and cooling method. When driven at the nominal electrical frequency, the shaft reaches 2000 rpm, matching feed-rate requirements on midsize lathes and machining centers. Its permanent-magnet field construction eliminates excitation losses, improving efficiency and supporting near-linear torque production across the speed range. The star-connected armature windings support balanced phase currents while limiting circulating neutral currents in the drive.

For rapid acceleration, the rotor can withstand a stall torque of 16.2 N-m without demagnetization. The electrical supply is synchronized at 133 Hz, a frequency that, when combined with the motor’s 8-pole layout, produces the stated mechanical speed. A Y winding connection further minimizes phase-to-phase voltage and supports continuous operation during extended production cycles. The motor is intended for continuous duty, so the thermal path and insulation system can handle sustained current without exceeding permissible winding temperatures during long machining programs.