MRT450E-3N-0350-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRT450E-3N-0350-NNNN is part of the MRT Synchronous IndraDyn T Motors series and features a mechanical maximum speed of 1400 rpm with an inside diameter of 350 mm. This motor has 30 pole pairs, a permissible rotor temperature of 100°C, and a rotor inertia of 1.01 kg·m². It uses a fixing per screws mounting style and has a protection class of IP00.
Internal Product Review
The MRT450E-3N-0350-NNNN is a well-engineered synchronous torque motor rotor suited for demanding rotary-axis applications. Fixing per screws and 20 x M8 rotor mounting threads support confident installation and secure mechanical retention. A 1400 rpm mechanical max speed and 30 pole pairs stand out as strong attributes for controlled, high-performance motion.
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Product Description:
The MRT450E-3N-0350-NNNN rotor is part of the MRT Synchronous IndraDyn T Motors series manufactured by Bosch Rexroth Indramat. It is supplied as the rotating element of a frameless torque motor and is intended for integration into direct-drive rotary tables, swiveling heads, or indexing stations used in industrial automation. When combined with the matching stator, the rotor delivers high continuous torque at very low speeds, allowing precise positioning without gear reduction. This direct-drive arrangement eliminates mechanical transmission components that could otherwise introduce backlash, friction, or additional maintenance requirements. The rotor’s open design also supports integration into machines that require a customized bearing arrangement or application-specific housing.
The rotor has an inside diameter of 350 mm, providing a large through-bore for cables, media lines, or workpiece clamping devices. Its mechanical operating limit is 1400 rpm; this is the highest rotational speed that may be applied without risking excessive mechanical stress or centrifugal force. Dynamic response is influenced by a rotor inertia of 1.01 kg·m², which stores kinetic energy and smooths velocity fluctuations during load changes. The rotor has a mass of 27.7 kg, allowing it to be incorporated into large rotary assemblies without adding unnecessary weight. The electromagnetic system uses 30 pole pairs, so the drive controller must supply the corresponding electrical frequency to achieve the commanded shaft speed. This pole arrangement supports smooth torque production when the rotor operates with its matching stator and a compatible controller.
A protection class of IP00 indicates that the rotor is supplied without an enclosure and must be installed inside a housing that provides protection from dust, contact, and liquids. The magnetic stack permits a rotor temperature of up to 100 °C during continuous operation, so the surrounding assembly must provide suitable heat dissipation. The rotor is secured through 20 threaded M8 holes arranged radially for face mounting. The associated screws must have a strength grade of 12.9 to transmit torque without thread pullout. Proper mounting distributes mechanical loads across the attachment points and helps maintain alignment with the stator air gap. The completed motor assembly must also prevent foreign objects from entering the exposed rotating components.
