MRS142F-2N-0050-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRS142F-2N-0050-NNNN is a rotor from the MRS Synchronous IndraDyn H Motors series. It features a frame size of 142, has a total length of 261 mm, and an internal diameter of 50 mm. The rotor is designed for step interference fit mounting and has a protection rating of IP00.
Internal Product Review
The MRS142F-2N-0050-NNNN is a Bosch Rexroth Indramat rotor for IndraDyn H synchronous spindle motors, built with a standard design variant and step interference fit mounting. Frame size 142 and a compact overall length support clean integration in precision spindle assemblies. IP00 protection and Class F insulation make the unit a strong choice for controlled, thermally demanding machine builds.
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Product Description:
The MRS142F-2N-0050-NNNN rotor is produced by Bosch Rexroth Indramat as a member of the MRS Synchronous IndraDyn H Motors series. It is a dedicated rotor assembly for synchronous spindle motors, converting the stator’s electromagnetic field into the rotational energy required by milling heads, printing cylinders, and automated positioning axes. The unit is supplied as a machined core that mates with IndraDyn H stators and encoder hardware during final spindle integration. Its dedicated design allows it to become part of an enclosure-integrated motor rather than operate as a separate, fully housed motor.
The rotor has a frame size of 142, which determines how it fits within the corresponding stator and bearing arrangement. The laminated core has an internal diameter of 50 mm, allowing installation on a shrink-fitted shaft or tension sleeve. A step interference fit provides the prescribed mounting method, with the mating parts heated or cooled during assembly to create a permanent mechanical bond that withstands high spindle acceleration. The frame length code is F, which indicates the active magnetic stack depth for this model. The rotor has an overall length of 261 mm, including its magnetic end plates, so the motor assembly must provide sufficient axial space.
The permissible ambient temperature range is 0–40 °C, helping keep thermal expansion within the necessary operating clearances. A protection rating of IP00 indicates that the rotor itself has no protection against contact, foreign objects, or water, so the surrounding motor housing must provide the required enclosure. Windings used with this rotor have Class F insulation, which permits winding temperatures up to 155 °C without insulation degradation. The rotor is supplied in the standard configuration without balance slots, sensor magnets, or specialized coatings. Cooling jackets and feedback components can be selected as part of the completed spindle assembly to suit the intended machine design and operating conditions.
