1MS242N-4B-A1 Bosch Rexroth Indramat
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MPN: R911251744
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The Bosch Rexroth Indramat 1MS242N-4B-A1 is a stator designed for 1MB Frameless Spindle Motors and is part of the 1MB High-Speed Asynchronous Motors series. It features a frame size of 242, liquid cooling, and comes with an aluminum cooling jacket. The stator includes a 1.5 meter connection cable conducted through the stator end and uses a 4B winding variant.
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Product Description:
Bosch Rexroth Indramat manufactured the 1MS242N-4B-A1 stator as part of the 1MB motor platform for high-speed spindle applications. It serves as the stationary magnetic element of a frameless spindle motor, supplying the rotating field needed to drive high-speed machining spindles and other precision axes in industrial automation. When paired with a matching rotor and inverter, the stator can be integrated directly into the spindle nose, which reduces package size and supports the fast acceleration needed in drilling, grinding, and milling applications. Its frameless layout also leaves more room for surrounding spindle components such as bearing supports and structural elements inside compact machine assemblies.
Thermal management is handled by liquid cooling, and the stator body incorporates an integral aluminum cooling jacket that channels coolant around the laminated core. With a frame size of 242, the outer diameter matches large machine-tool spindle housings. The model is shipped with a 1.5 m loom that exits through the non-drive end, allowing direct routing to a terminal box or drive cabinet. Instruction plates list coolant flow requirements and conductor assignments so the cooling circuit and electrical connections can be matched correctly during installation. The preassembled loom also helps reduce extra lead preparation inside tight spindle compartments where cable access is limited.
The winding variant is 4B, which corresponds to the phase resistance and compatible inverter voltage used with this stator. Length code N indicates a medium axial stack that balances torque capability with overall package length once the rotor is installed. Because the unit is a stator for a 1MB frameless spindle motor, it has no external housing and can be fitted directly into cartridge assemblies or custom headstocks. The surrounding machine structure provides the final support and alignment surfaces for the active motor parts. Compatibility with the 1MB High-Speed Asynchronous Motors series means the winding data, coolant passages, and mounting registers align with matching rotors and front bearing plates in the same platform.
Frequently Asked Questions about 1MS242N-4B-A1:
Q: What is the length and type of connection cable included with the 1MS242N-4B-A1 stator?
A: The 1MS242N-4B-A1 stator comes with a 1.5 meter connection cable conducted through the stator end.
Q: What cooling method does the 1MS242N-4B-A1 utilize?
A: This model features a liquid cooling method for efficient thermal management.
Q: What kind of construction is used in the 1MS242N-4B-A1 stator?
A: The stator is constructed with an aluminum cooling jacket, enhancing heat dissipation.
Q: What is the frame size of the 1MS242N-4B-A1 stator?
A: Frame size 242 is specified for this 1MS242N-4B-A1 stator.
Q: Which winding variant is present in the 1MS242N-4B-A1 stator?
A: The 1MS242N-4B-A1 stator uses the 4B winding variant.
