Product Description:

The 1MS310D-6B-A2 stator is produced by Bosch Rexroth Indramat as part of the 1MB High-Speed Asynchronous Motors series. It is a frameless spindle motor component that generates the rotating magnetic field for high-speed machine-tool spindles when paired with a matching rotor. In industrial automation, this stator supports compact spindle assemblies that sustain continuous cutting speeds while maintaining thermal stability in milling, grinding, and drilling centers. Its frameless layout also allows the spindle cartridge to remain compact while leaving bearing selection to the machine design.

The stator uses frame size 310, which provides a large internal diameter for rigid bearing arrangements that must withstand heavy cutting forces. Heat from the windings is removed by liquid cooling, and the integrated aluminum cooling jacket directs coolant around the laminations for efficient heat transfer. Power leads exit as a 1.5 m lead loom routed through the stator end, which simplifies cable routing without an external terminal box. The D motor length code indicates the stack height and helps predict the torque range at target spindle speeds.

The electromagnetic layout uses winding code 6B, which sets the resistance and inductive reactance needed for operation with high-frequency drives without excessive voltage drop. As a stator for a 1MB frameless spindle motor, the unit is supplied without housing or bearings, allowing direct installation into proprietary spindle cartridges. This arrangement leaves the outer spindle housing, bearing set, and sealing concept to the machine design, which is typical for integrated spindle assemblies. The design also uses common mounting geometry and sensor placement across the platform, which keeps the surrounding spindle structure aligned with the motor package.