Mu bokosi la giya la helical, magiya a helical spur ndi gawo lofunikira. Nayi kuwonongeka kwa magiyawa ndi ntchito yawo mu bokosi la helical gearbox:

1. Magiya a Helical: Magiya a Helical ndi magiya ozungulira okhala ndi mano omwe amadulidwa pakona kupita ku axis ya giya. Ngodya iyi imapanga mawonekedwe a helix pambali pa dzino, motero amatchedwa "helical." Ma giya a helical amatumiza kusuntha ndi mphamvu pakati pa mitsinje yolumikizana kapena yodutsana ndikumangiriza mano mosalekeza. Mbali ya helix imalola kuti dzino lizigwirana pang'onopang'ono, zomwe zimapangitsa kuti phokoso likhale lochepa komanso kugwedezeka poyerekeza ndi magiya odulidwa owongoka.
2. Magiya a Spur: Magiya a Spur ndi magiya osavuta kwambiri, okhala ndi mano owongoka komanso ofanana ndi giya. Amatumiza kusuntha ndi mphamvu pakati pa mikwingwirima yofananira ndipo amadziwika chifukwa cha kuphweka kwawo komanso kuchita bwino posamutsa kusuntha kozungulira. Komabe, amatha kutulutsa phokoso komanso kugwedezeka kochulukirapo poyerekeza ndi zida za helical chifukwa chakuchita mwadzidzidzi kwa mano.