1MS270C-4B-A1 Bosch Rexroth Indramat
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MPN: R911261069
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The Bosch Rexroth Indramat 1MS270C-4B-A1 is a stator for 1MB Frameless Spindle Motor, part of the 1MB High-Speed Asynchronous Motors series. It features a liquid cooling method and includes an aluminum cooling jacket with a 1.5 meter connection cable conducted through the stator end. The frame size is 270 and the winding variant is 4B.
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Product Description:
The 1MS270C-4B-A1 is a stator sub-assembly produced by Bosch Rexroth Indramat for the 1MB High-Speed Asynchronous Motors series. As the stationary magnetic core of a frameless spindle motor, it generates the rotating field that drives high-speed machine tool spindles and other precision automation axes when paired with a matching rotor. Integrating this component into a liquid-cooled housing allows continuous high power density while maintaining thermal limits during long machining cycles. This layout is useful where the motor is built directly into the machine spindle to reduce extra mechanical interfaces and support a compact rotary assembly. Because the rotor and bearings are selected separately, the surrounding spindle structure can be optimized for the required speed range and load profile.
The stator ships with a 1.5 m pre-terminated connection loom that exits through the stator end, reducing external wiring stress and simplifying enclosure routing. Heat removal is handled by liquid cooling, so the jacket can be connected to a plant coolant circuit to keep winding temperatures within rated limits during elevated duty cycles. Its dimensions correspond to frame size 270, and the motor length code C indicates the axial stack length used for this version. Electromagnetic behavior is set by the winding variant 4B, which matches the stator to compatible inverter characteristics. With the cable exiting at the end of the assembly, surrounding housing parts can be arranged without adding a separate external connection chamber.
An integral aluminum cooling jacket surrounds the lamination stack, promoting uniform coolant flow around the circumference and adding rigidity during press-fit installation in the spindle housing. The unit is supplied as a stator for 1MB frameless spindle motor, so it can be integrated into custom spindle assemblies that use separate rotor and bearing arrangements. The liquid circuit ports align with common manifold blocks, helping the cooling circuit fit neatly within the machine layout. This arrangement suits spindle systems that need direct integration into a machined housing rather than a complete housed motor.
Frequently Asked Questions about 1MS270C-4B-A1:
Q: What type of connection cable is provided with the 1MS270C-4B-A1 stator?
A: The 1MS270C-4B-A1 stator comes equipped with a 1.5-meter connection cable routed through the stator end.
Q: What cooling method does the 1MS270C-4B-A1 stator employ?
A: This model uses liquid cooling to ensure efficient thermal management during operation.
Q: What material is used for the cooling jacket on the 1MS270C-4B-A1 stator?
A: The stator construction features an aluminum cooling jacket for effective heat dissipation.
Q: What is the frame size of the 1MS270C-4B-A1 stator?
A: The 1MS270C-4B-A1 stator is made for frame size 270, fitting specific spindle assemblies.
Q: Which winding variant is utilized in the 1MS270C-4B-A1 stator?
A: The winding variant for this stator is 4B, specifying its electrical configuration.
