Ma giya a Helical haft akupera kulondola kwa ISO5 komwe kumagwiritsidwa ntchito mu ma helical geared motors
Thezida za helical shaft imakhala ndi ma meshing abwino, kufalikira kokhazikika komanso phokoso lochepa; giya ya helical imakhala ndi digiri yayikulu yolumikizana, yomwe imachepetsa katundu wa magiya aliwonse ndikuwongolera mphamvu yonyamula zida; chiwerengero chochepa cha mano a helical gear popanda undercut ndi ochepa.