Product Description:

The 1MR160F-A061 is a rotor core manufactured by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. Installed inside the stator, this rotating element interacts with the electromagnetic field to produce torque in high-speed spindle drive applications common to machine tools and automated production equipment. It contains a laminated steel stack and cast end rings that guide induction currents while maintaining the mechanical strength required for continuous operation at elevated surface velocities.

With a frame designation of 160, the rotor aligns mechanically with matching stators and housings, maintaining precise radial clearances for smooth rotation. Its bore measures 60.3 mm in inside diameter, allowing a hollow shaft or drawbar to pass through without secondary machining. The outer cylinder is ground for a stepped interference fit, and this stepped press configuration provides reliable frictional locking under centrifugal load. Dynamic behavior depends on the rotor’s moment of inertia; at 0.0161 kg·m², the stored energy is low enough to permit rapid speed ramps that shorten tool-change cycles. Lower stored energy also eases regenerative braking demands on the drive electronics.

The axial stack height is identified by the length symbol F, giving a clear reference for calculating magnetic active length and corresponding power. An open construction classified as IP00 means the rotor itself has no inherent sealing and must be housed within a protected spindle cartridge to prevent contamination. Shipping mass is 7.7 kg, a value used when determining balancing grades and bearing preload during assembly. Its designation as a Rotor for 1MB Frameless Spindle Motor indicates that the core, end rings, and shrink-fit surfaces are factory prepared for integration into a custom high-speed spindle housing.