G3.3ADL71K4 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB G3.3ADL71K4 is foot mounted and features a gear ratio of 177.27 across 3 stages. As part of the SM Synchronous Servo Motors series, it has a rated power of 0.25 kW, output torque of 305 Nm, and operates at 4000 rpm. This model includes a holding brake, IP54 protection, and a shaft with featherkey.
Internal Product Review
The G3.3ADL71K4 is a KEB synchronous servo motor assembly with a 3-stage gearbox and foot-mounted construction. Output torque of 305 Nm and IP54 protection give the unit strong application range in enclosed industrial drive systems. A holding brake and 177.27 gear ratio make the package especially appealing for controlled positioning and high mechanical advantage.
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Product Description:
KEB manufactures the G3.3ADL71K4 within its SM Synchronous Servo Motors series. This foot-mounted servo motor is supplied as a compact geared unit intended for closed-loop control with KEB inverters. By combining synchronous motor technology with an integral planetary gearbox, it provides repeatable speed and torque regulation for indexing tables, pick-and-place axes, and other precision stations in automated production lines. The geared configuration also allows the motor to operate at high speed while delivering lower output speed and increased torque to the connected load.
The stator is wound for 400 V operation, with the drive supplying a rated phase current of 0.78 A and enabling a mechanical output of 0.25 kW at the motor shaft. When the rotor turns at 4000 rpm, this model attains an overall efficiency of 64.6%, so roughly two-thirds of the electrical power is converted into mechanical work. Continuous torque delivered through the reducer reaches 305 Nm, which allows heavy loads to be accelerated without exceeding the motor’s thermal limit. The power factor is 0.72, indicating the balance between real and reactive power drawn from the inverter. These operating values help the connected drive regulate current while maintaining the intended speed and torque response.
Load adaptation is handled by a 177.27:1 reduction ratio achieved through three gear stages; this ratio multiplies the motor’s internal torque while reducing output speed and supporting a starting torque ratio of 1.8. A built-in brake holds the shaft when power is removed, and axial force is transmitted through a shaft with a feather key, simplifying its connection to driven equipment. The enclosure carries an IP54 rating, so dust ingress is limited and splashing water does not interfere with normal operation. Rotor behavior is influenced by an inertia of 4.3 kg cm², balancing quick response with smooth settling. The service factor of 1.60 provides additional thermal capacity, while the breakdown torque ratio of 2.1 and starting current ratio of 3.5 indicate the short-term mechanical and electrical loads that the connected drive must accommodate.
