Product Description:

The 1MS160D-4A-A2/S025 stator is manufactured by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. Installed as the stationary half of a frameless spindle set, it pairs with a matching rotor to form a compact, high-speed drive for machine-tool spindles and similar automated axes. The energized windings create a rotating field that converts inverter current into torque, giving precise speed and acceleration during cutting, grinding, or drilling tasks where space is limited.

Its integrated connection harness is a 1.5 m loom routed through the stator end, giving reach for cabinet terminations without external junctions. Heat generated by copper losses is removed by liquid cooling; coolant flows through channels in the housing so the stator can maintain thermal limits during continuous high-speed operation. Mechanical dimensions follow frame size 160, meaning the outside diameter aligns with 160 mm motor mounts in spindle housings. The magnetic core is encased in an aluminum cooling jacket that combines low weight with high thermal conductivity, supporting fast temperature equalization. Electromagnetic behavior is set by winding variant 4A, which corresponds to the coil turns and wire gauge used for the voltage, frequency, and current profile delivered by Rexroth inverters.

The selected length code D sets the active stack height, so torque output and thermal mass can be estimated without remeasuring the lamination packet. Because it is supplied as a stator for 1MB frameless spindle motor, the unit ships without bearings or end shields, and those elements are provided by the machine builder to achieve the required spindle geometry. A matching rotor, temperature sensors, and a liquid cooler are required to complete the high-speed axis used in compact machining centers. The unit remains under Bosch Rexroth Indramat logistics within the 1MB High-Speed Asynchronous Motors line.