Ua māhele ʻia nā kia bevel spiral i ʻelua ʻano, ʻo kekahi he spiralkāʻei bevel, nona ka ʻauamo nui a me ka ʻauamo liʻiliʻi e hui pū ana; ʻo kekahi he kia bevel spiral hypoid, me kahi mamao offset ma waena o ka ʻauamo nui a me ka ʻauamo liʻiliʻi. Hoʻohana nui ʻia nā kia bevel spiral i nā kahua hoʻoili mīkini e like me nā kaʻa, nā mokulele, a me ka hana mining ma muli o ko lākou mau pono e like me ke coefficient overlap nui, ka hiki ke lawe ikaika, ka lakio hoʻoili nui, ka hoʻoili maʻalahi, a me ka walaʻau haʻahaʻa. ʻO kona mau ʻano:
1. Kaʻa bevel pololei: ʻO ka laina niho he laina pololei, e komo ana ma ka piko o ke cone, e hoʻemi ana i ka niho.
2. Kaʻa bevel Helical: He laina pololei ka laina niho a ua tangent i kahi kiko, e hoʻemi ana i ka niho.
3. Nā kia bevel wili: nā kia hiki ke huki hou ʻia (kūpono hoʻi no nā kia o ke kiʻekiʻe like).
4. Kaʻa bevel wili Cycloid: nā niho contour.
5. ʻO ke kāʻei bevel spiral zero degree: Nā niho hōʻemi pālua, βm = 0, i hoʻohana ʻia e pani i nā kāʻei bevel pololei, me ke kūpaʻa maikaʻi aʻe, akā ʻaʻole maikaʻi e like me nā kāʻei bevel spiral.
6. ʻO ka niho Cycloid zero-degree bevel gear: Nā niho contour, βm = 0, i hoʻohana ʻia e pani i nā kia bevel pololei, me ke kūpaʻa maikaʻi aʻe, akā ʻaʻole maikaʻi e like me nā kia bevel spiral.
7. ʻO nā ʻano niho kiʻekiʻe o nā kia bevel wili ua māhele nui ʻia i nā niho i hoʻemi ʻia a me nā niho kiʻekiʻe like. ʻO nā niho i hoʻemi ʻia e komo pū ana me nā niho poʻo like ʻole, nā niho poʻo like i hoʻemi ʻia a me nā niho pālua i hoʻemi ʻia.
8. Nā niho contour: ua like ke kiʻekiʻe o nā niho o ka ʻaoʻao nui a me ka ʻaoʻao liʻiliʻi, hoʻohana pinepine ʻia no nā kia bevel oscillating.
9. Nā niho hoʻēmi hakahaka ʻaʻole isotopic: ua like nā piko o ka sub-cone, ka cone luna a me ke cone aʻa.