Product Description:

The 1MS160N-4A-A1 stator is produced by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. As the stationary magnetic component of a frameless spindle motor, it works with a matched rotor to generate the rotating field that drives precision grinding, milling, or drilling spindles in automated machine tools. Integrating this stator into a compact housing lets machine builders reach high shaft speeds without sacrificing thermal stability, which supports continuous-duty operation with consistent torque and low vibration. The magnetic assembly also supports accurate spindle behavior during rapid acceleration, sustained cutting passes, and repeated speed changes.

Key mechanical dimensions begin with a frame size of 160, which sets the outer stator diameter and the mounting envelope inside the spindle housing. The motor length code N indicates an intermediate axial stack length that balances copper volume with space constraints, while the winding variant 4A matches slot fill and wire gauge to high-frequency inverter operation. Thermal management relies on liquid cooling, and heat is transferred directly through an integrated aluminum cooling jacket that surrounds the laminated core. This cooling method removes heat close to the windings, which helps the spindle maintain stable operating behavior during long machining cycles.

Electrical and service connections are handled through a 1.5 m loom that exits from one end of the stator, allowing direct routing to the cabinet without added junctions. Routing the lead set out of one end also helps preserve space around the spindle body for surrounding machine components. The lead arrangement helps simplify installation and can reduce opportunities for signal interference in compact spindle assemblies. Because it is a stator for a 1MB frameless spindle motor, the component can be paired with compatible rotor kits while keeping the same basic envelope and cooling layout.