MRS200C-B075-NN Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
The Bosch Rexroth Indramat MRS200C-B075-NN is part of the MRS Synchronous IndraDyn H Motors series. The rotor has an inside diameter of 75 mm, outer diameter of 144 mm, and weighs 14.5 kg. It supports a maximum speed of 2500 min-1 with axial clamp and 6300 min-1 with shrink mount.
Internal Product Review
The MRS200C-B075-NN is a Bosch Rexroth Indramat synchronous motor rotor with a compression-joint design that feels well suited for demanding servo assemblies. A 6300 min-1 maximum speed on shrink mount and 2500 min-1 on axial clamp provide excellent flexibility across mounting methods. The 325 x 10^-4 kgm2 rotor moment of inertia supports stable dynamic behavior, making this model a strong choice for precision motion systems.
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Product Description:
The MRS200C-B075-NN rotor is supplied by Bosch Rexroth Indramat for integration within the MRS Synchronous IndraDyn H Motors series. As a frameless permanent-magnet rotor, it interacts with a corresponding stator to generate synchronous torque in high-performance positioning axes and spindle drives. The component is delivered as a raw magnetic core that can be clamped or shrink-fitted onto an application-specific shaft, allowing the finished motor to fit compact automation cells where direct-drive accuracy and limited backlash are required.
The allowable mechanical limits depend on the mounting method. When secured with an axial clamp, the rotor is limited to a surface speed of 2500 min⁻¹, while a shrink-fit raises the permissible speed to 6300 min⁻¹. Dynamic response is influenced by the mass properties: the rotor weighs 14.5 kg and its polar moment of inertia is 325 × 10⁻⁴ kg·m², so drive controllers can calculate acceleration torque accurately. A balancing circle diameter of 100 mm is provided, and eight M8 balancing threads along with an auxiliary M6 mounting thread allow correction weights to be added without disturbing magnetic symmetry. The compression-joint rotor type maintains uniform preload between the laminated core and hub, which helps reduce micromovement during repeated speed reversals.
A rotor inside diameter of 75 mm matches the recommended shaft journal, while the step bore is held to 74.8 mm to create the interference needed for thermal shrink assembly. Axially, the magnetic stack length is 180 mm, producing the active volume that pairs with the stator of the same series. The external surface measures 144 mm in diameter, which sets the air-gap clearance that affects motor efficiency. These dimensions establish the required fit between the rotor, shaft, and stator for proper assembly and operation.
