BL-MP300J-30S by Okuma

The Okuma BL-MP300J-30S servo motor from the BL Servo Motors series presents a compact, high-performance solution with a 5.1 kW power output and a rotational speed of 3000 RPM for demanding industrial automation tasks. This permanent magnet excited, synchronous device delivers up to 36 Nm of continuous torque through its smooth output shaft, while preserving a low inertial profile aided by an integrated internal air blower. Designed and certified by Okuma, the BL-MP300J-30S combines robustness and precision in a single UL-listed package, optimized for continuous operation in controlled environments. Its durable metallic housing features a prime black coat finish for protection against corrosive liquids and mechanical wear.

Detailed technical characterization of the BL-MP300J-30S includes a 3-phase configuration rated for 120 V input voltage and 200 Hz input frequency, drawing a nominal 53.4 A of current at full load. The motor integrates an ER-JF-7200D Encoder for high-resolution feedback and incorporates 8 pole pairs to achieve smooth torque output. With a max relative humidity of 0.95 and water splash resistance: Yes, it performs reliably in moderate humidity, while dust resistance: Yes maintains internal cleanliness. The unit carries an IP65 protection structure at its cable connectors and a peak installation height of 1000 m, ensuring consistent operation up to UL-defined altitude limits. Manufactured in 2004, this proven design underpins Okuma’s commitment to long-term reliability.

Operational features enhance performance under dynamic conditions: the built-in air blower maintains efficient thermal management, preventing overheating during continuous duty cycles. The smooth shaft design minimizes vibration and supports high-speed coupling with minimal backlash. Although not permitted for outdoor operation and residential operation, the motor excels in enclosed production lines where splash and particulate exposure occur. Its compact footprint and low inertial characteristics enable rapid acceleration and precise positioning, reducing cycle times in CNC machinery and robotic assembly.

System integration is streamlined through top-mounted connectors for power and feedback cables—sold separately—conforming to the same IP65 protection level as the housing. The BL-MP300J-30S pairs seamlessly with Okuma’s drive electronics and industrial controllers, facilitating direct synchronization in multi-axis systems. Target applications include precision machining centers, automated assembly lines, and high-speed packaging equipment where consistent torque, thermal stability, and encoder accuracy are essential.