Circular cylindrical worm gear pair：

Circular cylindrical worm drive (ZC) is a new type of cylindrical worm drive. Compared with ordinary cylindrical worm gear transmission, circular cylindrical worm gear transmission has the advantages of high load-bearing capacity, high transmission efficiency, and flexible design. ZC 1 worm drive, also known as Neumann worm drive, is a type of worm gear used in the West German "C-AVEX" reducer. This type of worm is formed by enveloping a circular disc grinding wheel with a circular cross-section.

ZC type circular cylindrical worm drive is similar to ordinary cylindrical worm drive, except for the difference in tooth profile shape. The helical surface of this worm gear is cut using a tool with a convex arc edge, while the worm gear is manufactured using the generating method. On the middle plane (i.e. the plane where the worm axis and the connecting line of the worm gear pair are located), the tooth profile of the worm gear is a concave arc, while the tooth profile of the matching worm wheel is a convex arc. So, the circular arc cylindrical worm drive is a type of transmission that meshes with concave convex arc tooth profiles, and it is also a type of linear contact meshing transmission. Its main characteristics are: high efficiency, generally reaching over 90%; High load-bearing capacity, generally 50% to 150% higher than ordinary cylindrical worm gear transmission; Small size; Low quality; Compact structure. This type of transmission has been widely used in the reduction mechanisms of mechanical equipment such as metallurgy, mining, chemical engineering, construction, and lifting.