Product Description:

The 1MS310F-6B-A2 is a dedicated stator module produced by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. Serving as the stationary half of a frameless spindle motor, the unit houses the windings that generate the rotating magnetic field needed for high-speed machining spindles in CNC centers and other precision automation equipment. Because only the stator is supplied, machine builders can integrate the active motor elements directly into custom housings and reduce overall spindle diameter while maintaining high torque density. This layout is commonly used where compact spindle construction is required without a separate motor housing.

The electrical and thermal limits follow the mechanical envelope assigned to a frame size of 310. Within this diameter, the motor length code F indicates the axial stack height and influences continuous power capability. Heat is removed by a closed coolant circuit around the windings, and this arrangement uses liquid cooling to permit high duty cycles with limited temperature rise. The cooling path helps keep winding temperatures more stable during sustained machining cycles. The assembly is delivered as a stator for a 1MB frameless spindle motor, so integration requires an external rotor and bearing set.

The wiring exits through the non-drive end in a pre-terminated 1.5 m lead, which helps simplify connection to the cabinet without additional splices or extensions. Around the laminated core sits an aluminum cooling jacket that channels coolant evenly and helps reduce thermal gradients across the winding area. The electromagnetic characteristics correspond to 6B as the designated winding variant, which matches the stator to specific inverter outputs through its electrical values. The fixed lead arrangement and integrated cooling jacket support installation in enclosed spindle assemblies where routing space is limited and steady thermal control is important.