E kewara gia bevel nke gbara okirikiri ụzọ abụọ, otu bụ nke gbara okirikiribevel gia, nke nnukwu axle na obere axle na-ejikọta; nke ọzọ bụ gia bevel spiral hypoid, nke nwere anya dị iche n'etiti nnukwu axle na obere axle. A na-ejikarị gia bevel spiral eme ihe n'ọhịa nnyefe igwe dịka ụgbọala, ụgbọelu, na igwu ala n'ihi uru ha dị ka nnukwu overlap coefficient, ikike ibu ibu siri ike, oke nnyefe buru ibu, nnyefe dị nro, na obere mkpọtụ. Njirimara ya bụ:

1. Gia bevel kwụ ọtọ: Ahịrị ezé bụ ahịrị kwụ ọtọ, na-ejikọta n'elu kọn ahụ, na-ebelata ezé ahụ.

2. Gia bevel nke Helical: Ahịrị ezé ahụ bụ ahịrị kwụ ọtọ ma na-adakọ ruo n'otu ebe, na-ebelata ezé ahụ.

3. Gia bevel gbara okirikiri: gia ndị a na-alọghachi azụ (dabara adaba maka gia ndị dị n'ogo hà nhata).

4. Gia cycloid spiral bevel: ezé contour.

5. Gia bevel gbara okirikiri nke efu: Ezé mbelata okpukpu abụọ, βm=0, nke e ji dochie gia bevel kwụ ọtọ, na-eme ka ọ kwụsie ike nke ọma, mana ọ dịghị mma dịka gia bevel gbara okirikiri.

6. Ezé cycloid nke na-enweghị ogo bevel: Ezé contour, βm=0, nke e ji dochie gia bevel kwụ ọtọ, na-eme ka ọ kwụsie ike nke ọma, mana ọ dịghị mma dịka gia bevel spiral.

7. Ụdị ogologo ezé nke spiral bevel gia na-ekewakarị n'ime ezé pere mpe na ezé pere mpe nhata. Ezé pere mpe gụnyere ezé pere mpe na-anaghị aha nhata, ezé pere mpe nhata na ezé pere mpe okpukpu abụọ.

8. Ezé ndị a na-akpọ Contour: ezé nke nnukwu na obere nsọtụ ha dị otu ogologo, a na-ejikarị ha eme ihe maka gia bevel na-agbagharị agbagharị.

9. Ezé na-ebelata ohere nke na-abụghị nke a na-ahụ anya: isi nke sub-cone, elu cone na mgbọrọgwụ cone na-adakọ.