MRT291E-3N-0200-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRT291E-3N-0200-NNNN is part of the MRT Synchronous IndraDyn T Motors series. It features a mounting axial force of 290 Newtons and a mounting radial force of 2490 Newtons. The rotor has an inertia of 0.15400 kg·m² and a mass of 14.3 kilograms.
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Product Description:
The MRT291E-3N-0200-NNNN rotor belongs to the MRT Synchronous IndraDyn T Motors series produced by Bosch Rexroth Indramat. As the rotating element of a frameless torque motor, it contains permanent magnets that interact directly with a stator to generate continuous torque without belts or gear reduction. This direct-drive arrangement supports precise angular positioning and high stiffness, making the rotor suitable for indexing tables, packaging turntables, and other automated axes that require smooth rotation. Its frameless design also allows the motor components to be integrated into machinery without a conventional motor housing.
The rotor can withstand a mounting axial force of 290 N, which is the permissible thrust applied along the motor axis during installation without distorting the magnetic air gap. During clamping into a hub or faceplate, a mounting radial force capacity of 2490 N accommodates press-fit loads applied perpendicular to the axis. Once the motor is running, an operating radial force limit of 1060 N governs continuous side loading from belt tension or overhung tooling. Dynamic behavior is influenced by a rotor inertia of 0.15400 kg·m², which affects the torque needed to achieve a specified angular acceleration. The rotor has a mass of 14.3 kg, and this value can be used with the inertia to calculate start-stop times and tune velocity control loops for accurate positioning. These force limits should be considered when selecting the hub, bearings, and surrounding support structure for the axis.
Mechanical coupling is provided through an M6 × 14 mm mounting thread, allowing metric bolts to draw the rotor assembly onto a flange or mandrel. A total of 20 threaded holes distributes the clamping pressure around the rotor and helps keep the hub centered during thermal cycling. The threads are machined on both sides, allowing the rotor to face either the load or the bearing support when installation space is limited. This two-sided arrangement provides flexibility when routing adjacent components or aligning the rotor with an integrated machine shaft. The rotor is dynamically balanced to support smooth operation within compatible MRT motor assemblies.
