Product Description:

The G1.2B.DK71K4BTW is a gear-integrated synchronous servo motor produced by KEB for the SM Synchronous Servo Motors series. The assembly merges a permanent-magnet motor with a precision helical gearbox so a single compact unit can deliver controlled rotary motion to machinery. In industrial automation, it serves as a drive element for conveyors, rotary actuators, or metering screws, translating closed-loop inverter commands into repeatable low-speed rotation while the integral reduction stage multiplies torque for high-load startups.

Its gear train provides a reduction ratio of 42.67; the output shaft turns once after the motor completes that many revolutions, allowing direct coupling. With this ratio, the unit delivers a nominal speed of 32 rpm and continuous torque of 74 Nm, making it suitable for indexing tables that must hold loads without drifting. The unit has a rated mechanical output of 0.25 kW and a rated current of 0.78 A at 400 V, allowing cabinet hardware to accommodate its modest heat dissipation requirements. Internally, the servo motor spins at 1,385 rpm, providing sufficient back EMF for stable vector control.

The mechanical interface uses a B14 flange pattern, and the gearmotor has a mass of 10 kg for direct mounting on small machine frames. A spring-applied brake locks the shaft when power is removed, while a PTC thermistor monitors motor temperature. The rotor inertia is 4.0 kg·cm², providing predictable acceleration when the motor is paired with a compatible drive. The gearbox bearings can support axial forces up to 2,800 N and radial forces up to 2,080 N, accommodating pulleys or pinions that overhang the housing. A power factor of 0.72 and a DC-link voltage of 560 V suit KEB 400 V-class inverters, while flange quality R under DIN 42955 maintains concentricity for accurate coupling.