MSS312F-0028-FA-N0CN-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MSS312F-0028-FA-N0CN-NNNN is a stator for synchronous kit spindle motors and is part of the MSS Synchronous IndraDyn H Motors series. It features a liquid-cooled stator-cooling jacket design, has a 1.5 meter power cable with flying leads, and a frame size of 312 with insulation class F. The stator is rated for a speed of 280 min-1 and operates at ambient temperatures from 0 to 40 degrees Celsius.
Internal Product Review
The MSS312F-0028-FA-N0CN-NNNN is a Bosch Rexroth Indramat stator for a synchronous kit spindle motor, configured with liquid cooling and a stator-cooling jacket. The standard design and 280 min-1 rated speed support stable spindle integration with consistent thermal behavior. IP00 protection and Class F insulation make this a strong technical choice for controlled machine assemblies.
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Product Description:
The MSS312F-0028-FA-N0CN-NNNN is a stator for synchronous kit spindle motors manufactured by Bosch Rexroth Indramat as part of the MSS Synchronous IndraDyn H Motors series. Installed directly in a custom spindle housing, the component forms the stationary magnetic field that interacts with the rotor to produce torque for machine-tool spindles, test rigs, and other precision drives. Its open construction allows machine builders to integrate custom bearings and coolant circuits while retaining the electromagnetic performance of an IndraDyn H motor.
A stator cooling jacket surrounds the lamination stack, and its channels provide liquid cooling to remove heat from the stator windings. The coolant inlet uses a G 1/2 thread, and the flow path is arranged alongside the axial power cable exit so the hoses and conductors extend in the same direction. With this cooling arrangement, the stator supports a rated speed of 280 rpm, making it suitable for large-diameter spindles that prioritize torque over high rotational speed. Both coolant ports are located on the axial face, which simplifies manifold routing and keeps the motor envelope compact within the spindle frame.
The return or service connection has an M30 × 1.5 thread, allowing the cooling jacket to be vented or connected in series with another cooling circuit. Electrical power reaches the windings through a 1.5 m power cable supplied with flying leads for direct routing into a control cabinet. The assembly has an IP00 protection rating, so the surrounding machine enclosure must provide protection against contact and foreign objects. The windings use Class F insulation, which permits operation at temperatures up to 155 °C. The motor has frame size 312, frame length F, and winding variant 0028, and the stator is supplied without a motor encoder. It operates at ambient temperatures from 0 °C to +40 °C and uses the standard mechanical design for this series.
