Na-egweri cylindricalSpur GearA na-eji igwe na-egwupụta ihe nke ugbo ala na-ebelata mmanụ
Ụlọ ọrụ iri kacha elu na china, a kwadebere ya na ndị ọrụ 1200, nwetara ngụkọta 31 mepụtara na akwụkwọ ikike 9. Ngwá ọrụ mmepụta ihe dị elu, ngwá ọrụ na-ekpo ọkụ, ngwá ọrụ nyocha.