MRT290B-3N-0200-BNNN Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
The Bosch Rexroth Indramat MRT290B-3N-0200-BNNN is a rotor of a torque motor from the MRT Synchronous IndraDyn T Motors series. It features an internal rotor diameter of 200 millimeters and has a rotor mass of 6.2 kilograms. The rotor is fastened by screws and operates with a degree of protection rated at IP00.
Internal Product Review
The MRT290B-3N-0200-BNNN is a Bosch Rexroth Indramat MBT-series torque motor rotor featuring screw fastening for secure mechanical integration. Support for coolant inlet temperatures from +5 to +40 °C and input pressure up to 6 bar makes this unit a well-engineered choice for stable thermal management.
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Product Description:
The MRT290B-3N-0200-BNNN is a rotor component supplied by Bosch Rexroth Indramat for liquid-cooled torque motors in the MRT Synchronous IndraDyn T Motors series. It serves as the magnetic core of a direct-drive system and transmits continuous torque directly to the machine axis without gear reduction. This arrangement supports precise position control in industrial automation equipment such as indexing tables and extruders. The model is designed as a rotor for an MBT torque motor and can be integrated into a compatible motor assembly.
With a mechanical frame size of 290, the unit matches stator housings with the corresponding diameter. The rotor has an internal diameter of 200 mm, providing the required internal opening and installation geometry once the component is seated. Its housing has a protection rating of IP00, so the rotor must be installed inside a fully enclosed motor body before it is energized. Dynamic performance is influenced by a rotor inertia of 0.08 kg·m², which affects the acceleration torque required from the drive. The rotor has a mass of 6.2 kg, which must be considered when calculating bearing loads during high-speed operating cycles. Screws positioned around the end-face flange secure the rotor within the motor assembly. The surrounding stator cooling circuit permits a maximum coolant inlet pressure of 6 bar without placing coolant directly in contact with the rotor laminations.
Storage, transportation, and operating temperature limits protect the permanent magnets and the adhesive layers within the assembly. When packed for storage, the rotor can tolerate temperatures from -25 to +55 °C. During transportation, it can withstand temperatures from -25 to +70 °C. Once the rotor is installed and energized, the ambient temperature around the machine must remain between 0 and +40 °C to support dimensional stability and proper magnetic alignment. Coolant entering the stator jacket may range from +5 to +40 °C, allowing chilled-water or tempered glycol circuits to remove heat while reducing the risk of condensation on the laminations.
