1. Performance characteristics of helical gear:(1) The meshing performance is better. Compared with the gear, the helical gear meshes more fully during the transmission process, the gear transmission is more stable, and the transmission force is more linear;(2) Long service life. The helical gear transmission has a coincidence degree, a long meshing time and a contact area, which makes the stress smaller, thereby improving the bearing capacity of the gear and prolonging the service life of the gear;(3) The structure is relatively . The structure of the helical gear is relatively , and a smaller gear mouse can basically bring about a relatively perfect deceleration effect.2. : For other extruders that use double gear pairs, such as mini V1 or V2 extruders, metal extruders, extruders, etc.Color: blackMaterial: metal 3DPackage Contents:1 x Helical gear with hole1 x Helical gear without holeOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.