Zida za Helicalpinion shaftimatenga gawo lofunikira pakugwira bwino ntchito kwa ma helical gearbox, omwe amagwiritsidwa ntchito kwambiri m'mafakitale monga magalimoto, kupanga magetsi, ndi kupanga. Magiya a helical ali ndi mano omwe amapendekeka pamakona, omwe amalola kufalikira kwa mphamvu kosavuta komanso kocheperako poyerekeza ndi magiya owongoka.

Pinion shaft, giya yaying'ono mkati mwa gearbox, ma meshes okhala ndi giya yayikulu kapena giya. Kukonzekera uku kumapereka kufalikira kwa torque kwapamwamba ndi kugwedera kocheperako komanso phokoso. Mapangidwe ake amatsimikizira kugawa bwino kwa katundu pa mano angapo, kumapangitsa kulimba kwa dongosolo la zida.

Zida monga chitsulo cha alloy kapena chitsulo cholimba kwambiri nthawi zambiri chimagwiritsidwa ntchito ngati ma pinion shafts kuti athe kupirira katundu wolemera ndi kuvala. Kuonjezera apo, ma shafts awa amachitidwa molondola makina ndi chithandizo cha kutentha kuti atsimikizire kulondola kolondola komanso moyo wautali wautumiki.