2024409（2024502）

This 2024409 (2024502) 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-reliability transmission requirements of power tools: pressure angle of 20°, module of 1.25, number of teeth of 19, helix angle of 20°/R, inner diameter of 17mm, addendum circle diameter of 28.9mm, total length of 12mm, and a unit weight of only 0.0289kg, which has the advantages of lightweight and structural strength.

The gear is made of 20CrMnTi alloy structural steel, a material with excellent hardenability, wear resistance and impact resistance, which can fully cope with the high-frequency and high-load operating conditions of power tools. The manufacturing process complies with strict precision machining standards: normalizing pretreatment → turning → hobbing → heat treatment strengthening → shot blasting → reaming → full appearance inspection. Among these processes, the heat treatment process improves the surface hardness and core toughness of the gear teeth; shot blasting eliminates tooth surface stress and optimizes surface finish; the reaming process ensures assembly dimensional accuracy; and the final full inspection ensures zero defects in product appearance and dimensions, fully meeting the power transmission requirements of power tools.