Mitsubishi MR-J3BRKS1-79-40M Hollow Shaft Spindle Motor for MELSERVO MR-J3 Series

The Mitsubishi MR-J3BRKS1-79-40M (MR-J3BRKS1-79-40M) is a hollow shaft spindle motor engineered by Mitsubishi Electric for high-performance motion control and spindle drive systems, including the SJ-V series and MELSERVO MR-J3 drive platforms. It features an integrated type 2 absolute feedback encoder for precise position sensing and incorporates high-speed bearings designed to maintain stability during demanding industrial machining and cutting operations. This unit delivers a rated output of 22 kW and a rated torque of 118 Nm at a rated rotational speed of 1,500 rpm, operating on a 200 VAC supply voltage class. Mechanically, the motor is constructed with a 250 x 250 mm flange and foot mounting configuration. It provides an IP44 protection rating to shield internal components against solid objects and water splash, and it is rated for reliable operation in ambient temperatures ranging from 0 to +40 degrees Celsius in industrial automation and CNC machine tool applications.