Pinion Gears by Wu Hung are precision-engineered for power transmission in compact systems like planetary gearboxes, rack-and-pinion setups, miniature gear motors, robotics, and medical devices. These small-diameter gears ensure accurate gear ratio control and torque conversion with high tooth profile accuracy, low backlash, and quiet operation.

Available in brass, steel (SCM415, SUS303), aluminum (AL7075), or POM, with optional ground finishes (HRC 50–58) and shaft integration (keyway, D-cut, spline), our pinions support modules M0.3–M2.5, tooth counts 6T–50T, and diameters 5mm–80mm.

Custom tooth forms, single/dual/stepped designs, and legacy part replication are offered under NDA or OEM partnerships, with full inspection reports for material, runout, and profile. Partner with us for reliable, customizable pinion gear solutions. Please explore our products below.