MRS182F-2N-0075-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRS182F-2N-0075-NNNN is part of the MRS Synchronous IndraDyn H Motors series and features a step interference fit mounting style with an inner diameter of 75 mm. This motor offers 4 pole pairs, has a maximum assembly force of 500 N, and weighs 22.7 kilograms. It includes a 75 FKM O-ring and an IP00 protection code.
Internal Product Review
The MRS182F-2N-0075-NNNN is a Bosch Rexroth Indramat synchronous motor rotor for MRS IndraDyn H systems, built with a step interference fit and 4 pole pairs. Rotor inertia of 0.059 kg·m² supports smooth dynamic response, while a maximum assembly force of 500 N helps maintain controlled installation. An excellent rotor option for precision spindle applications.
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Product Description:
The MRS182F-2N-0075-NNNN rotor is supplied by Bosch Rexroth Indramat as part of the MRS Synchronous IndraDyn H Motors series. Designed for synchronous servo stages, the rotor couples to a stator to deliver precise torque and position control in production lines, packaging modules, and machine-tool axes. It provides the rotating mass that interacts with the drive windings, and its dimensional code helps match the required mechanical interface. This arrangement supports accurate motion control wherever the motor must respond predictably to drive commands.
The assembly’s inner bore is machined to a 75 mm diameter, which fits the specified spindle size while still allowing for thermal expansion. Installation requires a maximum axial press force of 500 N; staying within this limit helps prevent microcracks in the laminated core. The rotor is secured by a step interference fit, so the shaft seats progressively and maintains concentricity under cyclic load. To seal the hub interface, the design uses a 75 FKM elastomer ring that tolerates chemical coolants. The ring uses a cross-section of 75 × 4 mm to maintain uniform squeeze around the full circumference. These features help keep lubricant inside the bearing cavity and reduce the entry of airborne particles into the motor air gap.
For electromagnetic performance, the rotor carries 4 pole pairs that establish the synchronous relationship with the drive frequency. The bare assembly has an IP00 rating, so it depends on the surrounding motor housing for protection. Thermal stability is critical, and the peak rotor temperature may rise to 145 °C during operation. Demagnetization margins remain acceptable down to the minimum running figure of 135 °C, and the spindle can be pre-chilled to -20 °C before heat soak to shorten installation time and limit condensation. Dynamic response is influenced by a moment of inertia of 0.059 kg·m², which supports predictable acceleration when paired with compatible drive controllers. The finished rotor weighs 22.7 kg, so handling equipment must support it during assembly.
