Product Description:

The 1MS200D-4E-A1 is a motor stator manufactured by Bosch Rexroth Indramat and offered in the 1MB High-Speed Asynchronous Motors series. This component forms the electromagnetic core of a frameless spindle assembly, generating the rotating field needed to drive a matching rotor without requiring an external motor housing. In industrial automation, it supports machine tools, grinding heads, and packaging spindles that need high surface speeds in a compact installation. Keeping the active copper close to the coolant path helps maintain stable thermal behavior during sustained operation.

The stator uses liquid cooling, so coolant circulates directly around the windings to remove heat instead of relying on ambient air. A cast aluminum cooling jacket provides a direct conduction path between the copper slots and the coolant chamber, which helps reduce temperature gradients during continuous high-speed duty. Mechanical geometry follows frame designation 200, giving the unit the outer diameter needed for installation against the surrounding bearing plates. The axial stack length is coded as D, which increases the active iron section for higher power density within the same diameter envelope. Power leads terminate in a 1.5 m loom that exits through the stator end, which helps route the connection toward the control cabinet without an intermediate junction.

The electromagnetic package uses winding pattern 4E, which establishes the slots-per-pole relationship and the back-EMF profile expected by compatible drive inverters. Because it is a stator for a 1MB frameless spindle motor, no end bells or shaft are supplied; the laminated tube is fitted into a precision housing and paired with a separate rotor to complete the spindle. This arrangement allows the surrounding spindle assembly to use its own bearing and housing layout while keeping the motor section compact for high-speed integration.