Main classification methods

Classification by transmission stages

Single-stage: 1 pair of gears, transmission ratio 3~10, simple structure, high efficiency (97%~98%), suitable for light deceleration requirements

Two-stage: 2 pairs of gears, transmission ratio 8~40, most widely used, balancing compactness and performance

Three-stage and above: transmission ratio 40~1000, used in heavy-duty equipment requiring significant deceleration

Classification by gear type

Spur cylindrical gears: simple to manufacture, low cost, average transmission smoothness, relatively high noise, suitable for low-speed and light-load applications

Helical cylindrical gears: high contact ratio, smooth transmission, low noise, strong load-carrying capacity, suitable for medium-high speed and heavy-load applications

Herringbone cylindrical gears: offset axial force, highest load-carrying capacity, suitable for extremely heavy-load and high-power transmission