MRS272F-1N-0135-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRS272F-1N-0135-NNNN is part of the MRS Synchronous IndraDyn H Motors series and features a frame size of 272 with a standard design variant. This rotor has a plain drilling mounting style, a smooth rotor bore, and a protection rating of IP00. It has an internal diameter of 135 mm and a total length of 444 mm, operating in ambient temperatures from 0 to 40°C.
Internal Product Review
The MRS272F-1N-0135-NNNN is a Bosch Rexroth Indramat IndraDyn H synchronous spindle rotor with a well-executed standard design. Plain drilling mounting and a smooth rotor bore support clean mechanical integration and dependable spindle assembly. IP00 protection makes the rotor a strong choice for enclosed machine designs.
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Product Description:
The MRS272F-1N-0135-NNNN is a rotor manufactured by Bosch Rexroth Indramat for the MRS Synchronous IndraDyn H Motors series. Supplied as the rotating core of an IndraDyn H synchronous spindle assembly, it works with the stator to produce the magnetic interaction needed for high-speed machining and positioning axes in industrial automation. This component belongs to the IndraDyn H synchronous spindle motor family and has frame length code F, which indicates the axial stack dimension accepted by the matching stator housing.
The rotor is designed for continuous service at ambient temperatures of 0–40 °C. A frame size of 272 mm provides the external diameter that mates with the corresponding stator laminations, while an internal diameter of 135 mm provides clearance for the spindle shaft and bearing set. Thermal endurance is supported by insulation class F, which allows the associated insulation system to withstand temperatures up to 155 °C. The protection rating is IP00, so the part has no inherent protection against contact, solid objects, or water and must be installed inside a suitable motor housing. The surrounding enclosure must also protect the exposed rotor from contamination and moisture during operation.
The rotor stack has an axial length of 444 mm, providing an active length suited to the pole coverage and torque requirements of the matching motor assembly. Mechanical fastening uses plain drilling through the stack, while smooth rotor drilling along the bore eliminates keyways and reduces stress concentrations during high-speed rotation. The design is the standard version, with dimensional interfaces and material grades intended for compatible components in the IndraDyn H spindle platform. Proper alignment with the stator and spindle shaft is necessary to maintain an even air gap and stable rotation. Installation inside the completed motor assembly also provides the support, sealing, and cooling provisions that the separate rotor does not supply on its own.
