Product Description:

The 1MR160F-C060 rotor element is produced by Bosch Rexroth Indramat and belongs to the 1MB High-Speed Asynchronous Motors series. It is a rotor for 1MB frameless spindle motors and is intended for direct integration into the machine housing, where the stator is mounted separately. In machining centers and grinding systems, the rotor converts electromagnetic force from the stator into rotational motion for high-speed spindle operation. This arrangement leaves the motor without a separate housing and allows the spindle assembly to determine the final shaft and bearing layout.

The rotor uses frame size 160, which matches the corresponding 1MB stator geometry. Its central bore measures 60.0 mm, allowing it to fit over a spindle shaft or drawbar of the same diameter. The rotor is rated for a peak mechanical speed of 20,000 rpm, so it is suited to high-speed spindle duty when the surrounding assembly is designed for that operating range. A length code F indicates an extended axial stack for higher torque than shorter versions in the same platform. Shaft retention is provided by a step interference fit, which uses a press-fit connection instead of keys. The rotor has a protection rating of IP00, so it must be installed inside an enclosed spindle housing that keeps contaminants away from the active parts.

The rotor has a mass of 10.2 kg, which affects centrifugal loading and the thermal behavior of the rotating assembly. Its polar moment of inertia is 0.0161 kg·m², giving the drive a known inertia value for acceleration and deceleration calculations. The outer surface is supplied with a measured outer diameter, so the lamination circumference is finished to a controlled tolerance for low runout after installation. This type of rotor is used in spindle systems where compact integration and accurate concentricity are required. The open construction also means that cooling and contamination control depend on the spindle housing rather than on a separate motor enclosure.