2020869

This 2020869 helical gear is a precision transmission component specially developed for power tools, classified as a helical gear type. Its core technical parameters are adapted to the compact and high-stability transmission requirements of power tools: pressure angle of 20°, module of 0.8, number of teeth of 8, helix angle of 15°/R, shaft diameter of 8mm, addendum circle diameter of 8.7mm, total length of 87mm, and a unit weight of 0.045kg. It features a slender structure while balancing transmission efficiency and structural strength.

The gear is made of 20CrMo alloy structural steel, a material with good hardenability and fatigue resistance, which can fully cope with the high-frequency start-stop and high-load operating conditions of power tools. The manufacturing process complies with strict precision machining standards with closely connected procedures: normalizing pretreatment → turning → rough grinding for datum correction → hobbing → heat treatment + correction → shot blasting → outer diameter grinding → full appearance inspection. Among these processes, the rough grinding for datum correction ensures the dimensional accuracy of subsequent processing; the combined process of heat treatment + correction improves tooth hardness and avoids deformation; the outer diameter grinding further optimizes assembly fit accuracy; and the final full inspection guarantees zero defects in product appearance and dimensions, fully meeting the power transmission requirements of power tools.