Kutsogolera kwawirigirm gear Ndipo gudumu la nyongolotsi ndi mtundu wa ma gear system yomwe imagwiritsidwa ntchito potumiza mphamvu. Ili ndi nyongolotsi, yomwe ndi yopanga ngati cylindrical chigawo chimodzi chopangidwa ndi mano a herm, ndi gudumu la nyongolotsi, lomwe ndi zida zowawa ndi nyongolotsi.

Mawu oti azitsogolera kawirikawiri amatanthauza kuti nyongolotsi ili ndi mano awiri, kapena ulusi, omwe amakulunga mozungulira silinda pamalo osiyanasiyana. Kapangidwe kameneka kumapereka gawo lalikulu loyerekeza ndi nyongolotsi yotsogola, yomwe imatanthawuza kuti gudumu la nyongolotsi idzazungulira nthawi zochulukira za nyongolotsi.

Ubwino wakugwiritsa ntchito guwa lambiri ndi gudumu la nyongolotsi ndikuti chitha kukwaniritsa chiwerengero chachikulu cha maginya chopindika, ndikupangitsa kuti ikhale yothandiza pogwiritsa ntchito malo ochepa. Zimakhalanso zodzitchinjiriza, kutanthauza kuti nyongolotsi imatha kunyamula gudumu la nyongolotsi popanda kusowa kwa ma brake kapena makina ena otseka.

Makina otsogola ndi nyongolotsi nthawi zambiri amagwiritsidwa ntchito m'makina ndi zida monga makonzedwe ake, ndikukweza zida, ndi zida zamakina.