QSY041B-030-HG0-UN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat QSY041B-030-HG0-UN is a synchronous servo motor from the QSY Synchronous Servo Motors series with a weight of 4.7 kg. It delivers a rated power output of 0.8 kW, a rated torque of 2.5 Nm, and operates at a rated speed of 3000 rpm. The motor features a brake holding torque of 2.2 Nm at 24 VDC and has 3 pole pairs.
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Product Description:
The QSY041B-030-HG0-UN is a synchronous servo motor produced by Bosch Rexroth Indramat. It belongs to the QSY Synchronous Servo Motors series. As a compact rotary actuator, the unit converts electrical energy into controlled shaft motion for positioning, indexing, or speed-regulated tasks in industrial automation lines. Its design allows a compatible drive controller to regulate torque, velocity, and position according to commands from the machine control system.
This model delivers a continuous mechanical output of 0.8 kW while maintaining a nominal shaft speed of 3000 rpm. At that operating point, it supplies a rated torque of 2.5 Nm from a DC bus rated at 244 V. The motor draws 2.8 A under these steady-state conditions, and its electrical design incorporates three pole pairs to match the associated drive controller’s commutation sequence. For short transients, the current may rise to 13.5 A, giving the motor additional capacity for acceleration or brief overloads without exceeding its thermal limits. The stall torque is 3.0 Nm at a current of 3.3 A, indicating the motor’s torque production at zero shaft speed. A rotor inertia of 1.86 kg·cm² moderates speed changes and affects the acceleration response of the connected axis. An M5 × 12.5 center hole in the output shaft assists with alignment during installation.
Peak mechanical torque reaches 11.3 Nm, allowing the motor to overcome brief load spikes during indexing stops or rapid reversals. Position retention during a power loss is handled by a permanent-magnet brake that produces 2.2 Nm of holding torque. The brake uses a 24 VDC supply and draws 0.4 A during operation. Its holding capacity helps prevent suspended or vertical axes from drifting after the drive is disabled. The motor weighs 4.7 kg, allowing it to be installed on moving carriages without adding excessive mass to the axis. The combination of moderate rotor inertia and high transient torque supports responsive changes in speed while the brake secures the load between operating cycles.
