Product Description:

The MST210U-0065-FT-N0CN-D303 is a frameless torque-motor stator built by Bosch Rexroth Indramat for integration into rotary tables, extruders, and other low-speed, high-torque axes within the MST Synchronous Torque Motors series. As a direct-drive component, it mounts close to the load, removes mechanical gear stages, and delivers constant torque for precision positioning in industrial automation. The unit is supplied as an active stator section that relies on an external rotor provided separately, and once paired, it offers smooth speed regulation and high resolution when driven by a compatible inverter.

Thermal management is handled through water cooling that circulates through a closed loop inside the stator jacket. The liquid path spans a 390 mm cooling jacket that matches the full active length of the coil stack, allowing uniform heat extraction across the winding. The stator’s outside jacket measures 230 mm in diameter, fitting directly into machine frames without spacers. Heat transfer surfaces are formed by an open aluminum cooling jacket, which combines low mass with high conductivity to keep copper temperatures within limits during continuous duty. The motor is supplied without an encoder, so an external position sensor is required when closed-loop feedback is needed.

Power conductors leave on the larger stator side, and the routing follows an axial cable layout that keeps the harness parallel to the motor shaft to avoid radial obstruction. A connected cable is factory installed, which eliminates on-site wiring inside the winding overhang and reduces contact resistance. Because the assembly carries an IP00 protection code, it must be mounted inside a guarded housing where the ingress of liquids or foreign objects is controlled. This frameless stator is intended for enclosed machine installations that provide the required mechanical support and external feedback components.