1MS240B-4A-A1 Bosch Rexroth Indramat
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MPN: R911247772
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The Bosch Rexroth Indramat 1MS240B-4A-A1 is a stator designed for the 1MB High-Speed Asynchronous Motors series. It features liquid cooling with an aluminum cooling jacket and comes with a 1.5 meter connection cable conducted through the stator end. The stator has a frame size of 240 and a winding variant of 4A.
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Product Description:
The 1MS240B-4A-A1 stator is produced by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. As the stationary section of a frameless spindle motor, it generates the magnetic field needed for high-speed machining spindles and other precision axes. This layout lets machine builders install the active motor components directly into a machine housing or matched rotor assembly, which helps save space in compact spindle designs. Because the rotor and housing are supplied separately, the stator is intended for spindle assemblies that require direct integration rather than a finished motor body.
The thermal design uses liquid cooling, so process water or a water-glycol mixture can circulate through the jacket and remove heat without relying on ambient airflow. Its frame size 240 suits large-bore spindle arrangements, while motor length code B indicates a medium axial stack length within the 240 frame family. An aluminum cooling jacket surrounds the laminations to move heat efficiently from the copper slots to the coolant passages. Electrical behavior is set by winding variant 4A, which corresponds to the turn count and wire gauge used for the matching voltage constant and current rating. This cooling and winding combination supports stable operation during sustained high-speed duty.
For installation, the stator includes a 1.5 m connection cable that is factory loomed and routed through the end of the assembly, so the leads can reach a terminal box without added joints. This part becomes a complete frameless spindle motor only after it is paired with a separate rotor core, because the stator itself contains no rotating element. The preassembled lead helps reduce extra connection points inside the spindle housing and simplifies cable routing through the machine structure. The cable routing, liquid unions, and stator outside diameter are intended for repeatable integration in machine spindles, and the unit can be pressed into a steel or composite sleeve while maintaining thermal transfer and electrical insulation.
Frequently Asked Questions about 1MS240B-4A-A1:
Q: How long is the connection cable provided with the 1MS240B-4A-A1 stator?
A: The 1MS240B-4A-A1 includes a connection cable that is 1.5 meters long and is conducted through the stator end.
Q: What cooling method does the 1MS240B-4A-A1 stator use?
A: This model utilizes liquid cooling for temperature management during operation.
Q: What is the frame size of the 1MS240B-4A-A1 stator?
A: The 1MS240B-4A-A1 stator features a frame size of 240, suitable for compatible spindle motor assemblies.
Q: What cooling jacket material is used in the construction of the 1MS240B-4A-A1 stator?
A: This stator version is manufactured with an aluminum cooling jacket to enhance heat dissipation.
Q: Which motor length code applies to the 1MS240B-4A-A1 stator?
A: The 1MS240B-4A-A1 is built according to the 'B' motor length code specification.
