MRS182A-1N-0085-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRS182A-1N-0085-NNNN rotor is part of the MRS Synchronous IndraDyn H Motors series and features a standard design variant with a frame size of 182 and frame length code A. This rotor has an internal diameter of 85 mm, total length of 60 mm, and uses a plain drilling mounting style. It is designed with insulation class F and has a protection rating of IP00, operating in ambient temperatures from 0 to 40°C.
Internal Product Review
The MRS182A-1N-0085-NNNN is a rotor for IndraDyn H synchronous spindle motors with a standard design variant. Plain drilling and smooth rotor drilling support straightforward mechanical integration and consistent running accuracy. IP00 protection and Class F insulation make the unit well suited for controlled spindle assemblies.
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Product Description:
The MRS182A-1N-0085-NNNN is a rotor component built by Bosch Rexroth Indramat for the MRS Synchronous IndraDyn H Motors series. As a dedicated rotor, it couples with an IndraDyn H synchronous spindle stator to produce the rotating magnetic field required for high-speed spindle positioning in CNC machines and other automated equipment. The part is delivered as a plain, unbalanced stack that becomes the rotating mass inside the assembled motor housing. This configuration supports precise acceleration and deceleration cycles in production machinery while allowing the completed spindle assembly to be balanced for its intended operating speed.
The frame size is 182, a diameter class that establishes compatibility with the appropriate stator and bearing set for large-diameter machine-tool spindles. Inside the laminated stack, the shaft bore measures 85 mm, providing a hollow passage for coolant pipes or drawbars. The overall axial length is limited to 60 mm, so the inertia contribution remains moderate, while the A frame length code indicates the shortest build in the series. With a protection rating of IP00, the rotor must operate inside an enclosed motor housing that prevents contaminants from reaching the internal components. The associated windings use insulation class F, allowing continuous service temperatures up to 155 °C without thermal degradation.
The rotor is suitable for ambient temperatures from 0 to 40 °C, matching the thermal range of typical enclosed spindle housings. Installation uses plain drilling through the hub rather than a keyed or tapered clamping interface, which simplifies balancing during assembly. The bore has smooth rotor drilling, keeping the internal surface free of steps or threads and supporting a shrink-fit connection to the shaft. The rotor is supplied in the standard version, without extra balancing rings, sensor magnets, or machined coolant channels. Its plain hub and smooth internal surface allow the rotor to be fitted to the matching shaft without interference from threads, keyways, or bore steps.
