1MR240B-A087

1MR240B-A087, Bosch Rexroth Indramat, 1MB High-Speed Asynchronous Motors rotor from the 1MR series is designed for direct-drive frameless spindle applications. It features a robust sleeve and laminated core construction and is optimized for high rigidity and power density in turning, grinding, and milling operations. The rotor frame size is 240 with a frame length designation of B, ensuring compatibility with standardized spindle housings. Balancing rings with tapped holes enable precision vibration control in accordance with DIN VDE 0530 requirements.

In-depth specifications include an Inside Diameter of Rotor of 87 mm, a Motor Size of 240, and a Motor Length code of B. Its Moment of Inertia is 0.135 kgm^2, offering predictable dynamic performance under rapid acceleration. The rotor’s Ingress Protection rating of IP00 requires suitable sealing for damp or foggy environments. Corrosion resistance is provided by a factory-applied red lacquer coating, which can be refreshed post-assembly. The design employs sleeve and laminated core elements to balance magnetic efficiency with mechanical strength, while balancing rings and tapped holes simplify alignment and vibration tuning.

Integration of the 1MR240B-A087 rotor into machine spindles simplifies assembly through precisely graduated fitting surfaces. Its frameless architecture delivers reliable heat dissipation via the stator air gap and minimizes axial space requirements. This rotor’s proven durability and standardized mounting make it ideal for high-speed machining centers, transfer lines, and special-purpose equipment demanding uninterrupted operation.