Thezida za nyongolotsireducer ndi njira yotumizira mphamvu yomwe imagwiritsa ntchito chosinthira liwiro la giya kuti ichepetse kuchuluka kwa zosinthika zamagalimoto (motor) pamlingo wofunikira wosinthira ndikupeza makina akulu a torque. M'makina omwe amagwiritsidwa ntchito popereka mphamvu ndi kuyenda, kuchuluka kwa zochepetsera ndikokwanira. Zotsatira zake zitha kuwoneka pamakina opatsira amitundu yonse yamakina, kuyambira zombo, magalimoto, ma locomotives, makina olemera omangira, makina opangira makina ndi zida zodzipangira zokha zomwe zimagwiritsidwa ntchito pamakina amakina, kupita ku zida wamba zapakhomo m'moyo watsiku ndi tsiku. , mawotchi, ndi zina zotero. Kugwiritsa ntchito chochepetsera kungathe kuwonedwa kuchokera pa kufalitsa mphamvu zazikulu mpaka kufalitsa katundu waung'ono ndi ngodya yolondola. M'mafakitale, chochepetsera chimakhala ndi ntchito zochepetsera komanso kuwonjezeka kwa torque. Chifukwa chake, imagwiritsidwa ntchito kwambiri pazida zosinthira liwiro komanso torque.

Pofuna kupititsa patsogolo mphamvu ya makina ochepetsera nyongolotsi, zitsulo zopanda chitsulo nthawi zambiri zimagwiritsidwa ntchito ngati zida za nyongolotsi ndi chitsulo cholimba ngati nyongolotsi.shaft. Chifukwa ndi sliding friction drive, panthawi yogwira ntchito, imapanga kutentha kwakukulu, komwe kumapangitsa mbali za kuchepetsa ndi kusindikiza. Pali kusiyana kwa kutentha kwapakati pakati pawo, zomwe zimapangitsa kusiyana pakati pa mating aliwonse, ndipo mafuta amakhala ochepa kwambiri chifukwa cha kuwonjezeka kwa kutentha, zomwe zimakhala zosavuta kuyambitsa. Pali zifukwa zinayi zazikuluzikulu, chimodzi ndi chakuti ngati kufananitsa kwa zinthu kuli koyenera, chinacho ndi mawonekedwe a pamwamba pa mikangano ya meshing, chachitatu ndi kusankha mafuta opaka mafuta, ngati kuchuluka kwa kuwonjezereka kuli kolondola, ndipo chachinayi ndi khalidwe la msonkhano ndi malo ogwiritsira ntchito.