Nyongolotsi ndi mafuta a makina ocheperako nyongolotsi, shaft yolumikizidwa ndi poyambira guove pansi. Agirm gearndi gudumu loti azitha ndi nyongolotsi, ndikusintha mayendedwe ozungulira a nyongolotsi kukhala yoyenda ndi zida za giya. Mano pa girm gear amadulidwa kumbali yomwe ikufanana ndi poyambira guove pa nyongolotsi pa nyongolotsi.

M'makina ochepera, nyongolotsi ndi mafuta othira zimagwiritsidwa ntchito kuwongolera kayendedwe ka mutu kapena patebulo. Nyongolotsi zimayendetsedwa ndi galimoto, ndipo monga zimazungulira, imayamba ndi mano a girm gear, ndikupangitsa magiya kuti asunthe. Kuyenda uku nthawi zambiri kumakhala kolondola kwambiri, kulola kuti pakhale mutu kapena patebulo kapena tebulo.

Ubwino umodzi wogwiritsa ntchito nyongolotsi ya nyongolotsi ndi makina opera opera ndikuti zimapereka mwayi kwa makina ochulukirapo, kulola kuti magalimoto ang'onoang'ono azitha kuyendetsa nyongolotsiyo akadali olondola. Kuphatikiza apo, chifukwa mano a nyongolotsigiyala Chitani ndi nyongolotsi pakona yopanda, mulibe mikangano yaying'ono ndikuvala pazigawo, nyongolotsi & wirm & wind wilts omwe adabweretsa moyo wautali wa dongosolo.