Product Description:

The 1MS310F-6B-A1 stator is manufactured by Bosch Rexroth Indramat for use in frameless spindle motors. As the fixed armature of the drive, it creates the rotating magnetic field that induces torque in the companion rotor, letting OEMs place high-speed spindle capability directly on the machine shaft without a separate motor housing. This component supports liquid circulation through an external jacket, so the thermal load of continuous high-frequency operation is removed from adjacent bearings and tooling.

The electromagnetic envelope is governed by a frame size of 310 mm, a diameter that sets the mounting bore and the maximum flux area available for torque production. Axial length follows motor length code F, indicating an extended stack height that raises continuous power without increasing the outside diameter. Electrical characteristics come from winding variant 6B, which sets the rated voltage, frequency range, and impedance needed for pairing with Rexroth drive modules. Heat is removed through liquid cooling, which keeps winding temperature within the insulation class even during prolonged peak duty. Thermal exchange occurs through an aluminum cooling jacket, and the high conductivity of aluminum lowers the coolant-to-copper temperature difference and limits hot spots. Production and assembly are controlled to maintain tolerances that match the corresponding rotor and housing parts.

Connection to the cabinet is established with a 1.5 m loom routed through the stator end, so internal leads remain protected from centrifugal airflow inside the spindle. Within the 1MB High-Speed Asynchronous Motors platform, its mechanical references align with standard motor bearings, coolant unions, and feedback cartridges. It is supplied as a Stator for 1MB Frameless Spindle Motor for compact milling, drilling, or grinding spindle assemblies that need stable temperature and electrical behavior during rapid load cycles.