QSK075C-0300-NN-M5-UG0-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat QSK075C-0300-NN-M5-UG0-NNNN is a synchronous servo motor from the QSK Servo Motors series. It features a plug connection that is rotatable to 240 degrees and uses natural convection for cooling. The motor is equipped with an optical multiturn-absolute encoder with 128 increments and a Hiperface interface, and comes with a plain shaft with a shaft sealing ring.
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Product Description:
The QSK075C-0300-NN-M5-UG0-NNNN is a synchronous servo motor manufactured by Bosch Rexroth Indramat within the QSK Servo Motors series. In industrial automation, it is coupled to actuators, rotary tables, or gearboxes where precise torque and speed control are required for positioning and synchronized motion. The motor converts drive current into rotary motion while its integrated encoder feeds back positional data to maintain closed-loop regulation. This arrangement helps the connected drive respond accurately to changing load conditions during continuous operation. It is suited for axes that need repeatable starts, stops, and speed changes without sacrificing positional accuracy.
Thermal management relies on natural convection, so heat leaves the housing through ambient airflow rather than active fans or liquid jackets. This method avoids the added complexity of auxiliary cooling hardware. Power and feedback wiring attach through a 240° rotatable plug, allowing the connector block to be turned to suit cabinet layout without stressing the leads. The integrated optical encoder yields 128 sinusoidal increments per mechanical revolution and communicates through the Hiperface protocol, which carries absolute and incremental data on a single two-wire channel for rapid startup alignment. Because the sensing principle is optical, resolution remains stable over time and is not affected by magnet aging. The motor has a frame length of C, providing a medium body depth that balances torque output and inertia for general-purpose axes.
The encoder is a multiturn absolute design, so it counts full revolutions and delivers position data after a power loss without requiring a new reference move. The motor uses the 075 frame size, giving a 75 mm stator diameter that matches compact gear stages and space-limited machine layouts. Its winding code of 0300 indicates the wire gauge and turn count selected for nominal voltage pairing with compatible drives. A plain shaft with a shaft sealing ring transfers torque while helping block lubricant ingress at the bearing seat. The unit is supplied without a holding brake, so external clamping or drive torque must secure the load during power-off events.
