The worm shaft, yomwe imadziwikanso kuti worm screw, ndi chipangizo chomwe chimagwiritsidwa ntchito kusuntha mozungulira pakati pa ma shaft awiri osafanana. Amakhala ndi ndodo ya cylindrical yokhala ndi poyambira kapena ulusi pamwamba pake. Thezida za nyongolotsiKumbali inayi, ndi mtundu wa zida zomwe zimafanana ndi wononga, zokhala ndi m'mphepete mwa mano zomwe zimalumikizana ndi mphuno yozungulira ya shaft ya nyongolotsi kuti isamutsire mphamvu.
Mphepete mwa nyongolotsiyo ikazungulira, pozungulira pozungulirapo amasuntha zida za nyongolotsi, zomwe zimayendetsa makina olumikizidwa. Makinawa amapereka ma torque apamwamba kwambiri, ndikupangitsa kuti ikhale yabwino kwa ntchito zomwe zimafunikira kuyenda kwamphamvu komanso pang'onopang'ono, monga zamakina aulimi.
Ubwino umodzi wogwiritsa ntchito shaft ya nyongolotsi ndi zida za nyongolotsi mu gearbox yaulimi ndikutha kuchepetsa phokoso ndi kugwedezeka. Izi ndichifukwa cha mapangidwe apadera omwe amalola kuti makina aziyenda bwino komanso ngakhale kuyenda. Izi zimapangitsa kuti makinawo asawonongeke komanso kung'ambika, kuwonjezera moyo wake komanso kuchepetsa ndalama zolipirira.
Ubwino wina ndi kuthekera kwawo kuwonjezera mphamvu kufala kwachangu. Mbali ya spiral groove pa shaft ya nyongolotsi imatsimikizira kuchuluka kwa zida, zomwe zikutanthauza kuti makinawo amatha kupangidwa kuti alole kuthamanga kwina kapena kutulutsa kwa torque. Kuchita bwino kumeneku kumapangitsa kuti mafuta azichulukirachulukira komanso kuchepetsa kugwiritsa ntchito mphamvu, zomwe zimapangitsa kuti pakhale ndalama zambiri.
Pomaliza, kugwiritsa ntchito shaft ya nyongolotsi ndi zida za nyongolotsi mu gearbox yaulimi kumatenga gawo lofunikira pamakina aulimi aluso. Mapangidwe awo apadera amalola kuti azigwira ntchito mwakachetechete komanso mopanda phokoso pomwe akupereka mphamvu zowonjezera mphamvu, zomwe zimapangitsa kuti pakhale ntchito yaulimi yokhazikika komanso yopindulitsa.
