MRS182F-1N-0085-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRS182F-1N-0085-NNNN is a synchronous motor from the MRS Synchronous IndraDyn H Motors series. It features an inner diameter of 85 mm, 4 pole pairs, and a rotor inertia of 0.053 kg m². The mounting style uses smooth holes, and the motor has a protection code of IP00 with an overall length of 363 mm.
Internal Product Review
The MRS182F-1N-0085-NNNN is a Bosch Rexroth Indramat MRS synchronous IndraDyn H motor with smooth-hole mounting and IP00 protection. The 4 pole-pair design and 0.053 kg m² rotor inertia support stable torque characteristics and disciplined dynamic response in matched drive assemblies.
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Product Description:
The MRS182F-1N-0085-NNNN is a synchronous permanent-magnet motor produced by Bosch Rexroth Indramat within the MRS Synchronous IndraDyn H Motors series. In automated machinery, the motor converts three-phase electrical input into mechanical rotation so axis drives can position loads and regulate speed without gearing. The frame dimensions make this model suitable for medium-torque tasks such as conveyor sections, packaging spindles, or gantry axes that require direct-drive motion control.
The shaft has an inner bore diameter of 85 mm, and the centering flange has a bolt-circle diameter of 112.5 mm with a tolerance of ±0.3 mm, allowing couplings to align with minimal runout. The rotor includes 12 M6 tapped balancing holes that allow mass distribution to be adjusted to reduce vibration at operating speed. The magnetic layout consists of 4 pole pairs, which the drive controller uses to calculate the electrical frequency required for a commanded rotational speed. The IP00 enclosure rating indicates that the motor has no integral protection against dust or moisture. It must therefore be installed inside a protected machine housing or enclosure that provides the necessary isolation from surrounding contaminants.
The rotating mass has a moment of inertia of 0.053 kg·m², supporting quick acceleration while maintaining smooth speed regulation during load changes. The external diameter across the rotor laminations measures 126 mm with a tolerance of -0.15 mm, providing predictable air-gap geometry when paired with the stator. The total body length is 363 mm with a tolerance of -0.5 mm, which must be considered when allocating axial space within the machine housing. The bore has an H5 tolerance grade, allowing compatible hub components to fit securely and transmit torque without fretting. A smooth-hole mounting arrangement supports keyed or shrink-fit connections rather than threaded fasteners, while the open motor design allows integration into machinery that provides its own protective structure and cooling provisions.
