50WF1-043 Hook Gear (341 Pinion)and50WF1-040 Lower Shaft (341 Gear Wheel)

Both BZ-008-C and BZ-009-C are spiral bevel gears specially developed and designed for sewing equipment. They are made of the same high-quality 20CrMo alloy structural steel, featuring excellent strength, toughness and wear resistance. They can accurately meet the core requirements of high-frequency transmission, low noise and high stability for sewing gears, and are key supporting components in the transmission system of 341 model sewing equipment.​
Among them, BZ-008-C corresponds to model 50WF1-043, specifically a hook gear (341 pinion). Its core technical parameters are accurately matched to the transmission requirements of the 341 model: pressure angle 20°, module 0.7, number of teeth 16, speed ratio 2, helix angle 36.393° (right-hand rotation, marked as 36.393°/R); the key dimensional parameters are as follows: inner diameter 7.94mm, tooth outer diameter 12mm, total length 25mm, and the net weight of the product is only 0.0617kg. The lightweight and compact structural design can effectively save the internal installation space of the equipment. This product adopts a refined full-process manufacturing process, sequentially going through eight core processes: normalizing, turning, gear milling, heat treatment, shot blasting, outer diameter grinding, boring and deburring. Precision is strictly controlled in each link; in particular, the outer diameter grinding and boring processes further improve dimensional accuracy, and the deburring process ensures no burrs on the surface of the component, ultimately guaranteeing smooth gear meshing and precise and efficient transmission.​
BZ-009-C corresponds to model 50WF1-040, which is a lower shaft (341 gear wheel) and forms an exclusive supporting combination with BZ-008-C. It has the same material and its core parameters achieve precise adaptation: the pressure angle is also 20°, module 0.7, number of teeth 32 (twice that of BZ-008-C), helix angle 36.393° (left-hand rotation, marked as 36.393°/L); in terms of dimensions, inner diameter 9.5mm, tooth outer diameter 29.421mm, total length 14.1mm, net weight 0.0303kg. Its manufacturing process adopts a targeted optimized design, sequentially going through six core processes: normalizing, turning, gear hobbing, heat treatment, shot blasting and reaming. Gear hobbing ensures tooth profile accuracy and transmission adaptability, and reaming guarantees the assembly accuracy of shaft components. It also undergoes strict process control and quality inspection. Together with BZ-008-C, through the structural cooperation of left-hand and right-hand rotation and the precise ratio of tooth number and speed ratio, it jointly realizes stable power transmission of the 341 model sewing equipment.​
Both products focus on the exclusive application of sewing gears. Relying on the excellent mechanical properties of 20CrMo material, precise tooth profile design and mature full-process manufacturing process, they can effectively improve the transmission stability of 341 model sewing equipment, reduce operating noise, extend the service life of the equipment, and provide core transmission guarantee for the efficient and stable operation of sewing equipment.