MSK103B-0300-NN-S1-UG1-NNNN Bosch Rexroth Indramat
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MPN: R911321763
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The Bosch Rexroth Indramat MSK103B-0300-NN-S1-UG1-NNNN is part of the MSK IndraDyn S Synchronous Motors series and features a standard design with a motor size of 103 and length B. This synchronous servomotor uses natural convection cooling and has an IP65 protection rating. It comes with a plain shaft, a holding brake with 33 Nm torque, and Hiperface optical encoder technology.
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Product Description:
The MSK103B-0300-NN-S1-UG1-NNNN is an IndraDyn S synchronous servomotor manufactured by Bosch Rexroth Indramat for the MSK IndraDyn S Synchronous Motors series. It combines permanent-magnet excitation with electronic commutation to deliver precise torque and velocity in automated assembly cells, presses, and handling modules. Its construction follows the standard mechanical design, and the active section uses motor size 103 with B frame length. Inside one housing, the motor, encoder, and holding brake form an integrated axis package that reduces external components and helps keep the machine layout compact.
The housing carries a protection rating of IP65, which seals the stator and connections against dust ingress and water jets so the motor can be mounted outside control cabinets. Position feedback is generated by an optical sensor that delivers 128 signal periods per mechanical revolution, and the signals exit through a rotatable 240° connector that eases cable routing in tight spaces. An electrically released holding brake applies 33 Nm of static torque to secure vertical loads when the drive is de-energized and to help prevent unintended axis movement at standstill. Thermal endurance is tied to insulation class 155, allowing continuous winding temperatures up to 155 °C within an operating range of 0–40 °C. The electromagnetic system uses winding code 0300, which corresponds to copper fill, resistance, and current constants matched to compatible IndraDrive inverters.
Heat is dissipated by natural convection, so no external blower or liquid loop is required. Motion feedback is absolute and single-turn, and data are exchanged over the Hiperface interface so the connected drive can read rotor position for commutation and closed-loop control. A plain shaft with precision-ground tolerance couples directly to gearheads or timing belts without a keyway, reducing shaft eccentricity at high speed. This shaft form is suited to clamp-style hubs and other friction-locked couplings used on precise servo axes.
Frequently Asked Questions about MSK103B-0300-NN-S1-UG1-NNNN:
Q: What encoder interface is present on the MSK103B-0300-NN-S1-UG1-NNNN motor?
A: The MSK103B-0300-NN-S1-UG1-NNNN uses Hiperface as its encoder interface.
Q: What kind of holding brake is included with the MSK103B-0300-NN-S1-UG1-NNNN and what is its torque rating?
A: This model is equipped with a holding brake that provides 33 Nm of torque and is electrically released.
Q: What is the protection rating of the MSK103B-0300-NN-S1-UG1-NNNN servo motor?
A: The MSK103B-0300-NN-S1-UG1-NNNN motor features IP65 protection for resistance to dust and water jets.
Q: How is the MSK103B-0300-NN-S1-UG1-NNNN servomotor cooled?
A: Cooling for this motor is provided by natural convection, meaning no external fans are required.
Q: What type of shaft does the MSK103B-0300-NN-S1-UG1-NNNN motor have?
A: The MSK103B-0300-NN-S1-UG1-NNNN uses a plain shaft configuration.
