Product Description:

The 1MR160E-A060 is the rotor element used inside Bosch Rexroth Indramat’s 1MB High-Speed Asynchronous Motors series. It is supplied as a bare iron core so that machine builders can couple it with a separately ordered stator and bearing set, forming a frameless spindle assembly that drives high-speed machining heads and automated tool spindles.

The rotor’s dimensional envelope starts with a Frame Size 160, establishing the outside diameter that matches the corresponding stator bore. Inside that profile, an Inside Rotor Diameter 60 mm reserves clearance for the shaft sleeve and coolant passages. During operation the rotor may spin up to a Mechanical Max Speed 20000 rpm; this rating dictates the centrifugal stress limits for shrink-fit tool holders and reinforces balancing requirements. Dynamic response is shaped by a Rotor Inertia 0.0149 kg·m², a value that defines how quickly torque from the inverter can accelerate or decelerate the spindle. Connection to the shaft uses a step interference fit; the stepped journals create a press fit that transmits torque without keys while keeping run-out within micron tolerances.

The remaining characteristics complete the performance picture. A Rotor Mass 7.1 kg contributes to thermal capacity and determines the bearing preload required for high-speed stability. The build is identified by Motor Length Code E, indicating the active lamination stack depth that governs the achievable power density once the rotor is paired with its stator. Supplied as a Rotor for 1MB Frameless Spindle Motor, it integrates directly with liquid-cooled housings and sensor rings specified for that platform. When inserted into the stator of the 1MB High-Speed Asynchronous Motors family, these geometric and inertial properties combine to deliver rapid speed changes, minimal vibration, and sustained torque for continuous production cycles.