Product Description:

The 1MS160F-4A-A1/S045 is a stator subassembly used in the 1MB High-Speed Asynchronous Motors series from Bosch Rexroth Indramat. Serving as the stationary half of a frameless spindle package, it creates the rotating electromagnetic field required to drive high-speed machining spindles and other precision axes in automated production cells. The unit fits into a matching machine housing and pairs with a separate rotor sleeve, creating a short, rigid power train that eliminates belt drives, minimizes vibration, and supports rapid tool changes in computer numerical control equipment.

The stator removes heat through liquid cooling, where a closed coolant circuit circulates directly against the lamination stack to maintain winding temperature during continuous high-speed duty. Its frame size of 160 corresponds to a 160 mm outside lamination diameter and sets the mechanical envelope for spindle cartridge design. Power and feedback conductors exit through a 1.5 m loom from the non-drive end, allowing cabinet terminations without intermediate connectors. An external aluminum cooling jacket surrounds the core to improve thermal conductivity and provide a corrosion-resistant surface for coolant passages. The electromagnetic configuration uses winding variant 4A, which sets resistance and inductance values compatible with standard 1MB inverter profiles used in grinding, milling, and drilling centers.

Axial stack height code F indicates an intermediate length that balances torque output and rotational inertia for mid-power spindle ranges. The component mates to a separately ordered rotor through an interference fit, and precise axial shims are used to achieve the intended air gap. Integration instructions and dimensional tolerances are provided for alignment with the drive parameters and machine interfaces used for this motor platform.