MRS382D-1N-0240-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRS382D-1N-0240-NNNN is part of the MRS Synchronous IndraDyn H Motors series and features 9 pole pairs and plain drilling mounting style. This motor has a rotor inertia of 1.911 kg·m² with a rotor mass of 97.2 kg, and the rotor dimensions include an inner diameter of 240 mm and an outer diameter of 282 mm.
Internal Product Review
The MRS382D-1N-0240-NNNN is an MRS synchronous IndraDyn H motor rotor with plain drilling and an H6 inner bore fit. A 9-pole-pair configuration and 1.911 kg·m² rotor inertia support smooth torque transmission and stable dynamic behavior. The substantial rotor mass reflects a well-engineered component for demanding drive assemblies.
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Product Description:
The MRS382D-1N-0240-NNNN is a rotor from the MRS Synchronous IndraDyn H Motors series manufactured by Bosch Rexroth Indramat. Intended for high-torque direct-drive applications, the rotor forms the rotating element of a synchronous motor and transmits electromagnetic torque without gear reduction. In industrial automation, it works with a stator assembly and drive controller to position heavy rotary tables, printing cylinders, or indexing platforms with high dynamic accuracy.
The rotor has a mass of 97.2 kg, providing rotational mass that helps moderate load disturbances during operation. Its outside diameter measures 282 mm, establishing the air gap and influencing the torque constant when the rotor is combined with the stator’s magnetic circuit. An internal bore of 240 mm provides space for cables or cooling lines and serves as the clamping surface on the machine shaft. With a moment of inertia of 1.911 kg·m², the rotor supports motion sequences that alternate between slow movement and rapid indexing without placing excessive demand on the servo amplifier. Magnetic excitation uses 9 pole pairs, giving the drive eighteen magnetic poles per mechanical revolution for precise commutation.
The rotor has 32 M8 balance holes with a depth of 12 mm for precise mass correction on a balancing machine, helping control residual vibration after installation. It also has two M6 pressure-oil ports with a depth of 12 mm, which allow hydraulic oil to be injected during shrink-fit installation or controlled disassembly. The central bore is machined to an H6 tolerance, providing a close fit that helps maintain concentricity during thermal cycling. A plain drilling layout means the rotor has no keyway or spline and instead relies on frictional clamping to transfer torque to the hub.
