MRS202B-1N-0096-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRS202B-1N-0096-NNNN is part of the MRS Synchronous IndraDyn H Motors series and has a frame size of 202 with a total length of 237 mm. This rotor features a smooth internal diameter of 96 mm, insulation class F, and a protection rating of IP00. It is designed for environments with ambient temperatures ranging from 0 to 40°C and uses a standard plain drilling mounting style.
Internal Product Review
The MRS202B-1N-0096-NNNN is an IndraDyn H synchronous spindle rotor with a standard design variant. Plain drilling mounting and a smooth rotor bore make integration straightforward for precision spindle assemblies. Class F insulation supports dependable thermal performance in 0-40°C ambient conditions.
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Product Description:
Bosch Rexroth Indramat manufactures the MRS202B-1N-0096-NNNN as part of the MRS Synchronous IndraDyn H Motors series. The component is a rotor intended for high-speed spindle drives used in milling, drilling, and turning centers. Positioned inside the laminated stator core, the rotor provides the magnetic circuit and mechanical inertia required for synchronous torque generation, allowing the drive to maintain a constant speed under changing loads. Its geometry follows IndraDyn H spindle standards, allowing the rotor to align with the corresponding bearings, encoder rings, and cooling jackets without additional machining.
The standard design uses an unmodified mass distribution and balancing arrangement suited to general machining applications. A frame size of 202 mm establishes the rotor diameter, while the frame length code B indicates the axial configuration. The active magnetic stack has an iron length of 200 mm, providing the magnetic volume needed for torque production. The total rotor length is 237 mm, allowing the assembly to fit between the motor end shields. Its bore has a diameter of 96 mm and supports large through-shaft clamping systems. The rotor dimensions also influence its polar moment and operating behavior at elevated spindle speeds.
The windings used with this rotor have Class F insulation, which is suitable for temperatures up to 155 °C. The laminated stack must remain dimensionally stable as heat transfers from the surrounding windings during operation. The rotor has an IP00 protection rating, so it does not provide inherent protection against dust, contact, or coolant and must operate inside a suitable motor enclosure. Installation uses a plain drilling mounting arrangement that accepts press-fit or shrink-fit hub interfaces without a keyway. Continuous operation is permitted at ambient temperatures from 0–40 °C, provided that the assembled motor maintains the required cooling conditions. Proper enclosure sealing is necessary to prevent machining debris and liquid from reaching the unprotected rotor assembly.
