Product Description:

The G12A.DM71G4B02 is a gear-integrated synchronous servo motor produced by KEB within the SM Synchronous Servo Motors series. In industrial automation, it supplies closed-loop, low-speed torque to positioning tables, conveyors, and indexing drives through its internal reduction stage. The integrated feedback, when used with a paired servo drive, allows the machine controller to issue speed or position commands while providing a predictable mechanical output. By combining the motor, gearing, and an electromagnetic brake in one housing, the unit simplifies installation and reduces wiring complexity on assembly lines and packaging equipment.

At its electrical rating, the motor delivers a mechanical output of 0.37 kW while drawing 1.00 A from the drive inverter. The four-pole rotor supports synchronous operation, and the shaft reaches a nominal rotation of 1410 rpm. Combined with a power factor of 0.71, this operating point yields apparent power that matches compact inverter outputs. Overall conversion losses are limited because the motor reaches a rated efficiency of 75.5%, placing it in the IE2 efficiency class. Internal clearances are maintained by a nominal air gap of 0.2 mm. The sealed housing has an IP54 protection rating, enabling operation in dusty production areas without an additional enclosure.

The integrated helical gear stage uses a ratio of 24.88, reducing the motor’s rated speed to an output of 57 rpm and allowing the gearbox to multiply torque to 62 Nm at the driven shaft. An electrically released, spring-applied brake secures standstill; it develops 5 Nm of holding torque and consumes 25 W during energization. The brake releases fully within 40 ms, so the axis can accelerate without delay, and the moderate output speed suits feeders and small hoists that require consistent low-speed positioning.