Product Description:

The 1MS160E-4A-A1 is a modular stator component produced by Bosch Rexroth Indramat for inclusion in the 1MB High-Speed Asynchronous Motors series. As a standalone stator, it forms the stationary electromagnetic core of a frameless spindle motor used in machining centers and other automated equipment that require high rotational speeds. When combined with a matched rotor, the unit generates the rotating magnetic field required to drive compact spindle assemblies while allowing the motor to be embedded directly into the mechanical structure.

This stator uses liquid cooling, a closed circuit that circulates coolant through the housing to carry heat away from the windings and maintain thermal stability during continuous high-speed operation. The 160 frame size gives the stator a standard outside diameter for mounting into precision spindle housings. Its E length code sets the active stack height, so torque output can be estimated when paired with the appropriate rotor. Heat exchange efficiency is improved by the aluminum cooling jacket, which offers high thermal conductivity without adding excessive mass. Electromagnetic performance is tuned through the 4A winding variant, which indicates the turn count and conductor cross-section used with the intended voltage and frequency range of 1MB drive modules.

Connection to the drive inverter is simplified by a factory-installed 1.5 m loom that exits through the stator end, reducing the need for on-site cable fabrication and keeping lead routing short. As a stator for 1MB Frameless Spindle Motor assemblies, it supports hollow-shaft spindle layouts that can accommodate coolant pipes or media lines through the center. It is part of the 1MB High-Speed Asynchronous Motors series from Bosch Rexroth Indramat for use in compact high-speed spindle systems.