Product Description:

The 1MS160E-4B-A2 stator belongs to the 1MB High-Speed Asynchronous Motors series. It forms the active magnetic section of a frameless spindle motor and works with a matched rotor to create the rotating field required for high-speed machine-tool spindles and other precision axes. In this configuration, the stationary winding assembly delivers torque without a separate motor housing, which helps preserve stiffness in compact spindle designs. Because the stator is integrated directly into the machine housing, the drive train can be shorter and the rotating assembly can have lower inertia, which supports fast response and stable speed control.

The stator is supplied with a 1.5 m loom routed through the stator end, so power and sensor leads leave the assembly in a single protected bundle. That arrangement reduces the need for extra junction hardware and helps keep cable routing compact inside the spindle structure. Heat from copper and iron losses is removed by liquid cooling, which supports continuous operation at demanding spindle speeds. The mechanical geometry follows frame size 160, and the motor length code E indicates a long axial lamination stack that adds thermal mass and torque capability. An integrated aluminum cooling jacket surrounds the core and transfers heat efficiently from the windings to the coolant circuit, which helps keep temperatures more uniform across the stator body.

The winding variant 4B uses an electromagnetic layout matched to the required voltage and current of a compatible inverter. As a stator for a 1MB frameless spindle motor, it fits the corresponding rotor rings and feedback hardware without intermediate bearing seats in the stator body. This arrangement is used where the spindle structure carries the bearings and the motor components are built directly into the machine. The use of slot insulation and vacuum impregnation helps the winding system resist thermal and electrical stress during sustained high-speed operation.