Product Description:

The 1MS200H-4D-A1 is a stator element in the 1MB High-Speed Asynchronous Motors series produced by Bosch Rexroth Indramat. As the fixed electromagnetic core of a frameless spindle assembly, it forms the primary field that interacts with a separately mounted rotor, enabling compact, high-speed machine-tool spindles and other automation axes to generate torque without an enclosing motor housing. Integrators insert this stator directly into the machine spindle sleeve, saving space while preserving concentricity and dynamic balance.

The unit ships with a 1.5 m loom that carries phase leads and sensor wires through the rear stator end, allowing straightforward routing toward the drive cabinet. Thermal management relies on liquid cooling, so a continuous coolant flow absorbs copper and iron losses instead of relying on ambient air. The unit uses frame size 200, which matches 1MB rotor kits of the same class. The motor length code is H, which provides a deeper active stack for higher continuous power density. Electrical performance follows winding variant 4D, matching the voltage and current demands of high-frequency inverters.

For additional heat transfer, the lamination stack is encased in an aluminum cooling jacket, whose internal channels distribute coolant evenly around the circumference to reduce thermal gradients across the active core. The component is a Stator for 1MB Frameless Spindle Motor, so it mates directly with rotor sleeves, end bells, and sensor modules without modification. It uses the compact proportions of the 1MB High-Speed Asynchronous Motors platform and remains compatible with other metal-cutting subsystems from Bosch Rexroth Indramat. The coolant jacket surrounds the active lamination area rather than a separate outer motor housing, which helps keep the thermal path short during spindle operation.