MRT290G-3N-0200-NNNN Bosch Rexroth Indramat
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MPN: R911389942
The Bosch Rexroth Indramat MRT290G-3N-0200-NNNN is a rotor for a torque motor, part of the MRT Synchronous IndraDyn T Motors series. It features a mechanical frame size of 290 and an internal rotor diameter of 200 mm. This rotor is rated for IP00 protection, offers a permissible coolant inlet temperature of 5 to 40 °C, and supports screw fastening.
Internal Product Review
The MRT290G-3N-0200-NNNN is a torque motor rotor for synchronous direct-drive systems, featuring screw fastening and a standard-version build. Rotor inertia of 0.235 kg·m² and maximum coolant input pressure of 6 bar support stable integration in demanding motion assemblies. Operation across a 0 to +40 °C ambient range makes this unit a strong choice for consistent industrial performance.
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Product Description:
The MRT290G-3N-0200-NNNN is a rotor segment produced by Bosch Rexroth Indramat within the MRT Synchronous IndraDyn T Motors series. As the rotating element of a torque motor, it provides direct-drive torque for indexing tables, roll drives, and similar automation axes that benefit from zero-backlash operation. The rotor is supplied as a standalone component that can be paired with the corresponding stator and control electronics for high-precision position control in industrial machinery. This arrangement allows the motor to transmit torque directly to the driven load without requiring a gearbox or other mechanical transmission components.
The rotor has a mechanical frame size of 290, which establishes the outer ring dimensions and determines the matching stator housing. A continuous magnetic path surrounds an internal rotor diameter of 200 mm, providing clearance for large machine shafts or fluid passages. Rotational responsiveness is influenced by a mass moment of inertia of 0.235 kg·m², which the drive controller uses when calculating acceleration and deceleration ramps. The part is secured with screws, eliminating the need for shrink-fit tools during assembly. For liquid-cooled installations, the adjacent stator may receive coolant at pressures up to 6 bar. The rotor materials are designed to withstand the mechanical loading associated with the cooling arrangement without distortion during operation.
The rotor may be stored within a temperature range of -25 to +55 °C when it is outside the machine. During transportation, it can withstand a temperature range of -25 to +70 °C. Operation is permitted within an ambient temperature range of 0 to +40 °C. Coolant entering the mating stator must remain between +5 and +40 °C to reduce the risk of condensation on magnetic surfaces. Because the component has an IP00 protection rating, it must be integrated into a protected enclosure that prevents accidental contact and limits exposure to contamination. The delivered rotor is the standard version and does not include special coatings or auxiliary balancing features.
