MRS200B-A108-NN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat MRS200B-A108-NN is a rotor from the MRS Synchronous IndraDyn H Motors series with a compression joint rotor version and weighs 7.5 kilograms. It has a maximum speed of 1200 revolutions per minute and features IP00 protection. The rotor operates within an ambient temperature range of 0 to 40°C and has an insulation class of F.
Internal Product Review
The MRS200B-A108-NN is an IndraDyn H synchronous spindle rotor with a compression-joint version that supports secure mechanical integration. A max speed of 1200 min⁻1 and rotor inertia of 300×10⁻4 kgm² promote stable spindle response and controlled acceleration. With IP00 protection and insulation class F, this rotor is a strong fit for enclosed precision drive assemblies.
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Product Description:
The MRS200B-A108-NN is a precision rotor manufactured by Bosch Rexroth Indramat for the MRS Synchronous IndraDyn H Motors series. As the rotating element of these spindle motors, it interacts with the stator’s electromagnetic field to generate torque and regulated speed in machine tools and automation platforms that require positional accuracy and smooth cutting performance. The rotor can spin at up to 1200 rpm, which is the maximum mechanical speed that the surrounding drive may command.
Dynamic response is influenced by a moment of inertia of 300 × 10⁻⁴ kg·m²; this moderate value supports stable acceleration without excessive drive current. The rotor has a mass of 7.5 kg, which must be accommodated by the bearings and lifting equipment during assembly. Its magnetic core is enclosed within an iron stack with an outer diameter of 144 mm. This diameter aligns with the mating stator bore to maintain the required air gap between the rotating and stationary components. Connection to the spindle shaft is achieved through a ground bore measuring 108 mm with an H6 tolerance, providing a precise shaft interface for torque transmission without keys or splines.
The rotor is rated for operation from 0 to 40 °C, permitting installation in standard plant enclosures without supplemental temperature control. Its IP00 rating indicates that the component is supplied without protection against contact, dust, or water, so the machine enclosure must provide suitable shielding. Trim balancing after the rotor is coupled to the shaft is performed through an M8 threaded hole and eight auxiliary hole locations. These adjustment points allow residual vibration to be corrected after the spindle tooling is mounted. Axial location inside the spindle cartridge is established by a machined shoulder that extends 82.5 mm, positioning the magnetic stack accurately relative to the motor feedback device.
