Product Description:

The 1MS160N-4C-A1/S010 stator is produced by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. Acting as the stationary field generator inside a frameless spindle, it supplies the rotating magnetic flux that drives a matching rotor. Mounted directly in a machine head without an external housing, it helps builders create compact spindles for automated milling, drilling, and grinding where tight speed control and low rotating inertia are required. Because the assembly is frameless, the surrounding machine structure provides the bearing support and overall mechanical enclosure. This layout also lets the spindle designer control the final bearing spacing and housing stiffness to suit the machine axis.

The cooling circuit uses liquid cooling, so heat is carried away by a closed coolant flow rather than ambient air. Mechanical fit is set by frame size 160, which establishes the outside diameter for drop-in placement. Axial length follows motor length code N, giving a specific active stack that affects torque density. Electrical behavior follows the 4C winding variant, which sets the voltage and current relationship used by the matching inverter. An outer aluminum cooling jacket surrounds the laminations and transfers heat efficiently from the copper windings to the coolant path. That combination supports stable thermal behavior during prolonged high-speed operation, where winding losses must be removed continuously.

System integration is flexible because the stator is suitable for third-party drives, allowing OEMs to pair it with standard inverters when the electrical match is correct. Power leads exit as a 1.5 m loom routed through the non-drive end, which reduces separate cable transitions at the spindle body. Temperature monitoring relies on NTC resistors, PTC resistors, and bimetals, so the control system can react to rising thermal load before insulation is overstressed. The sensor set provides multiple thermal signals for protective functions during repeated duty cycles. Classified as a stator for a 1MB frameless spindle motor, the unit supplies the electromagnetic section of the spindle while the machine builder selects the rotor, bearings, and tool interface.