Product Description:

The MRS202A-2N-0085-NNNN is a rotor assembly produced by Bosch Rexroth Indramat within the MRS Synchronous IndraDyn H Motors series. In an industrial automation cell, this rotor serves as the rotating element of a high-performance synchronous motor, coupling magnetic flux from the stator to mechanical output at the shaft. Its laminated steel body and sealing features support repeatable torque production and low vibration in packaging lines, pick-and-place gantries, and numerically controlled machine tools.

The mechanical interface uses a bolt circle diameter of 129 mm, which aligns the rotor with the drive flange and helps maintain concentricity. The hub uses a step interference fit, so the mounted connection stays tight and radial play is minimized during rapid speed changes. The rotor accepts an O-ring sized 85 × 4 mm to help contain lubrication and protect the air gap. The assembly has an IP00 protection class, so it is intended for installation inside a motor structure rather than for exposed use. Dynamic balance can be adjusted through 24 × M6 × 10 mm holes around the rim, which provide points for balance correction when needed.

Rotor responsiveness is influenced by a mass moment of 0.055 kgm², which helps the drive accelerate and decelerate the shaft without excessive current demand. The magnetic core has an outside diameter of 145.5 mm and an overall length of 187 mm, giving adequate surface area for the embedded magnets while fitting standard stator bores. The rotor has 5 pole pairs, which sets the electrical frequency required for synchronous operation and establishes the basic commutation pattern. These dimensions support stable motor performance across a wide speed range in automated production equipment.