Helical Gear is better than Spur Gear. It could make the center distance shorter and used in heavy load and high speed. Helical gear reducer is a new Speed Reduction Gearing with advanced design concept and merits of small volume, light weight and quieter, etc. Helical gear are made of high quality alloy steel cased by carburizing which made it strong in carrying capacity and wear well.
Advantages: (1) Good meshing, Sooth transmission, Little noise.
(2) High contact ratio reduce the load of each gear kit and improve the carrying capacity of gears.
(3) No undercut.
Disadvantages: Helical gear is very complicated to be manufactured.