A na-eji ihe eji eme ihe dị ka ndebanye ahụ dị elu, nke a na-eji dochie anya mmiri nke njedebe nke njedebe na hyperbola.

Atụmatụ nkehypoid gears:

1. Mgbe ị na-eche ezé nke nnukwu wiil, tinye obere wiil kwụ ọtọ n'akụkụ aka nri nke wiil buru ibu. Ọ bụrụ na anyụike nke obere aro dị n'okpuru axis nke nnukwu wiil, a na-akpọ ya obere oge na-agbadata, ma ọ bụghị ya, ọ bụ ihe na-ewu ewu.

2. Dị ka ebe dị anya na-abawanye, helix akụkụ nke obere wiil na-abawanye, ma dayameta nke obere wiil na-abawanye. N'ụzọ dị otu a, ike na ike nke obere wiil nwere ike ịbawanye, ma ọnụọgụ nke obere wiil nwere ike belata, enwere ike ịnweta mgbasa ngwa ngwa dị elu.

Uru nke hymoid gears:

1. Ọ nwere ike belata ọnọdụ nke ịnya ụgbọ ala bevel na draịva, si otú a belata etiti nke ahụ na ụgbọ ala, nke bara uru iji meziwanye nkwụsi ike nke ụgbọ ala

2. Ngbanwe nke giar na-eme ka ọnụ ọgụgụ ezé nke na-akwọ ụgbọ ala na-akwọ ụgbọala na-akwọ ụgbọala nwere ike inweta ibu

3. Ihe otiti karịrị nkehyperboloid gia Mbugharị dịtụ oke ibu, ike dị elu mgbe ị na-arụ ọrụ, ikike na-ebu, na-aga n'ihu ka njọ, ndụ ahụ dịkwa ogologo.