MRS200B-B075-NN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRS200B-B075-NN is part of the MRS Synchronous IndraDyn H Motors series and features a rotor weight of 12.0 kg with a length of 155 mm. This motor has a rotor bore fit of 75 H6, a maximum speed of 2500 min^-1 with an axial clamp, and a shrink shaft fit of 75 s5. The rotor outer diameter measures 144 mm while the balancing circle diameter is 100 mm with an 8 x M8 hole pattern.
Internal Product Review
The MRS200B-B075-NN is an IndraDyn H synchronous motor rotor with a compression joint mount and a 75 H6 rotor bore fit. A 75 s5 shrink shaft fit and 300 x 10^-4 kgm^2 rotor inertia support precise coupling and stable dynamic behavior. Max shrink speed of 6300 min^-1 stands out as a strong performance advantage.
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Product Description:
The MRS200B-B075-NN rotor is produced by Bosch Rexroth Indramat for the MRS Synchronous IndraDyn H Motors series. It is the rotating element that couples to the stator’s electromagnetic field and delivers mechanical power to conveyor drives, gantry axes, and other high-duty automation stations. By responding directly to high-frequency current commands, the rotor allows closed-loop position or velocity control, making it a key component for machines that require repeatable motion profiles and minimal cycle-time deviation during multi-shift production.
The rotor’s balancing features start with a circle diameter of 100 mm, a dimension that locates the correction planes used to reduce residual vibration at operating speed. Eight threaded holes arranged in the 8 x M8 pattern accept set screws or dowels that secure the balance weights in this plane. When clamped axially, the assembly may run up to 2500 rpm; this ceiling protects the joint faces from fretting and limits centrifugal stress. Dynamic response is influenced by an inertia of 300 × 10⁻⁴ kg·m², so drive tuning must compensate for the stored kinetic energy during rapid reversals. A rotor length of 155 mm sets the active magnetic stack and contributes directly to continuous torque.
To exceed the axial-clamp limit, the same rotor can be shrink-fitted, raising the permissible speed to 6300 rpm without additional balancing steps. This upgrade relies on the interference of the 75 s5 shaft fit, which is established after heating the hub and letting it contract onto the 75 H6 bore. An outer diameter of 144 mm fixes the air gap with the stator, and the total mass of 12.0 kg guides lifting, transport, and support selection. Auxiliary details such as the M6 pressure-oil port, the 74.8 H6 pilot, and the compression-joint mount complete the mechanical interface.
