The walking axis of a robot is a core component for power transmission and support. RV reducers provide extremely high rigidity, precision, and torque while maintaining a compact size and exceptional reliability, making them an ideal match for the demanding requirements of walking robot joints in terms of load capacity, impact resistance, and precision.

Does a higher gearbox ratio mean more torque? This engineering guide explains the relationship between gearbox ratio, output torque, and output speed, and compares planetary gearboxes, harmonic gearboxes, and RV gearboxes. Learn why reduction ratio alone cannot determine gearbox torque capacity, efficiency, dynamic response, precision, or service life, and what engineers should consider when selecting a gearbox for robotics, CNC machines, servo systems, and industrial motion control.

A servo motor can deliver high speed, precise control and fast dynamic response, but the transmission system between the motor and the machine also determines how effectively these capabilities are transferred to the load. A planetary gearbox is widely paired with servo motors because its coaxial structure, high efficiency, low backlash, high torsional rigidity and flexible reduction ratios make it suitable for a broad range of motion systems. From CNC machine tools and industrial automation to AGVs, photovoltaic equipment and lithium battery production lines, planetary gearboxes can provide a practical balance between precision, performance and cost. This article explains why planetary gearboxes work well with servo motors and how engineers can select the right transmission for different applications.

Selecting the right RV reducer for a welding positioner requires more than simply matching the reducer to the workpiece weight. A heavy-duty welding positioner must provide sufficient output torque, high torsional rigidity, stable low-speed rotation, accurate positioning, and reliable performance during acceleration, deceleration, and reversing. In this article, we explain how to select an RV reducer and servo motor for a welding positioner by calculating output speed, reduction ratio, workpiece inertia, gravity load torque, acceleration torque, motor torque, and peak torque. A practical 500 kg welding positioner example is also used to show how these parameters affect RV reducer selection.