Product Description:

The 1MS241D-6A-A1 stator is produced by Bosch Rexroth Indramat as a component in the 1MB High-Speed Asynchronous Motors series. It is a standalone stator element intended for frameless spindle assemblies in which the rotor mounts directly on the machine shaft instead of using a separate motor housing. In industrial automation, this part forms the electromagnetic core of high-speed machining spindles, converting drive current into a rotating magnetic field that couples with the mating rotor to deliver torque at elevated rpm. This arrangement is commonly used where spindle stiffness, reduced rotating mass, and fast speed changes are important.

Connection to the power converter is provided through a 1.5 m loom that exits the stator end, giving the assembly a fixed lead length for routing to a terminal block without extensions. Thermal management relies on liquid cooling, so a closed coolant circuit removes heat rather than ambient airflow and supports higher continuous current density. The mechanical envelope follows frame size 241, which matches the corresponding rotor kit and housing bore. Axial stack height follows motor length code D, which sets the active iron length and the available power rating. Each unit undergoes vacuum impregnation to stabilize the windings against vibration during high-speed operation.

The stator body is supplied with an aluminum cooling jacket that conducts heat from the lamination core into the coolant path, helping keep temperature rise within permissible limits during prolonged duty. Electromagnetic parameters follow winding variant 6A, so the phase resistance and inductance match compatible drive modules tuned for rapid acceleration. This arrangement supports a compact headstock layout because the cooling jacket is integrated with the stator body rather than added as a separate outer housing. When incorporated into a frameless spindle motor, the part leaves the rotor mounted directly on the machine shaft for a dense, spindle-oriented package.