855718 Finished Lower Shaft Main Gear and 855717 Hook Shaft Pinion

This series of 855718 Finished Lower Shaft Main Gear and 855717 Hook Shaft Pinion are dedicated helical gear transmission components for sewing equipment. Crafted from high-quality 20CrMo alloy structural steel, they are manufactured through a multi-step precision process flow of normalizing – turning – threaded hole machining – reaming – hobbing – heat treatment – shot blasting – reaming – screw assembly, which ensures both tooth profile accuracy and structural stability.

The 855718 Finished Lower Shaft Main Gear features a pressure angle of 20°, a module of 1, 36 teeth, a speed ratio of 2, and a helix angle of 15°/R. It has an inner diameter of φ10mm, an outer tooth diameter of φ38mm, an overall length of 16mm, and a single-piece weight of 0.0555kg. Its tooth surface is strengthened by heat treatment and shot blasting, providing excellent wear resistance and impact resistance, making it suitable for power transmission scenarios of the lower shaft in sewing equipment.The 855717 Hook Shaft Pinion comes with a pressure angle of 20°, a module of 1, 18 teeth, and a helix angle of 15°/L. It has an inner diameter of φ7.94mm, an outer tooth diameter of φ20mm, and an overall length of 17mm. It meshes precisely with the main gear to achieve stable and noiseless transmission, serving as a core component of the hook drive system in sewing equipment.Both gears boast strong structural adaptability, capable of meeting the working conditions of high-frequency and continuous operation of sewing machinery, thus ensuring the efficient and stable running of the equipment.