Atụmatụ nkehelical gia:
1. Mgbe meshing abụọ mpụta gia, ntụgharị pụtara na-abụghị direction, mgbe meshing ihe esịtidem ger na mpụga gia na ntụgharị pụtara n'otu ụzọ.
2. Ekwesịrị ilebara anya n'ihe gbasara ọnụ ọgụgụ ezé na gia ọ bụla mgbe ị na-ejikọta nnukwu ihe dị n'ime ya na obere ihe mpụga, ebe ọ bụ na ụdị nnyonye anya atọ nwere ike ime.
3. Ọtụtụ mgbe, a na-eji obere ngwo mpụga na-ebugharị gia ime
4. Na-enye ohere maka nhazi nhazi nke igwe
Ngwa nke ngwa ime:Planetary gear drive nke oke mbelata oke, clutches gearbox wdg.