1MS376B-QA-A2 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
MPN: R911258231
Ask for AvailabilityThe Bosch Rexroth Indramat 1MS376B-QA-A2 is a stator for 1MB frameless spindle motors in the 1MB High-Speed Asynchronous Motors series. It features a frame size of 376, a motor design that is open kit style, and has a liquid cooling method with an aluminum cooling jacket. The stator comes with a 1.5 meter connection cable conducted through the stator end and has an IP00 protection class.
Internal Product Review
The 1MS376B-QA-A2 is a stator for a 1MB frameless spindle motor featuring an open kit motor design. Liquid cooling and an aluminum cooling jacket provide effective thermal control for demanding spindle applications. IP00 protection makes the stator well suited for enclosed machine builds.
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Product Description:
The 1MS376B-QA-A2 is a stator supplied for integration into 1MB High-Speed Asynchronous Motors, a series developed by Bosch Rexroth Indramat for spindle applications that require a compact torque source. As a frameless component, it is built directly into a machine tool housing rather than installed in a separate motor frame. This layout lets the surrounding machine structure carry the mechanical support that a standard motor housing would normally provide. In operation, the stator forms the stationary half of a high-speed spindle motor and generates the electromagnetic field required for rotary motion in industrial automation.
This stator is engineered for liquid cooling, so coolant channels remove generated heat and support continuous high-speed operation without thermal derating. Its mechanical envelope uses frame size 376, which matches large-format spindle assemblies. The open kit motor design omits an external frame, permitting close coupling to the host machine structure and lowering overall inertia. Because the winding area is exposed, the protection rating is IP00, so the installation must provide its own enclosure and keep chips, dust, and accidental contact away from energized parts. Heat passes through an aluminum cooling jacket bonded to the lamination stack for efficient transfer to the circulating coolant. The active depth follows length code B, and the electrical characteristics follow winding code QA to match the resistance and inductance values set at production.
A factory-installed 1.5 m connection cable exits through the stator end, giving enough reach to the drive without additional splicing. When paired with the matching rotor, the assembly can be arranged as a compact spindle package with coolant routed through the jacket and power led through the supplied cable loom. This layout reduces the need for extra external mounting space around the motor section. It also helps control temperature, preserves assembly height, and supports positional accuracy in the finished spindle.
