Cav crankshafts tig ntawm high speeds, yuav tsum tau siv cov bearings kom txo tau kev sib txhuam thiab kuj. Txawm li cas los xij, cov bearings siv ntawm crankshafts yog qhov tshwj xeeb thiab txawv kiag li ntawm cov bearings peb pom txhua hnub.
Cov neeg feem coob paub txog pob bearings, raws li qhia hauv daim duab saum toj no, uas tau siv dav hauv tsheb. Lawv tuaj yeem pom nyob rau hauv qhov chaw xws li gearboxes, log, twj tso kua mis, cua txias compressors, thiab lub tsheb alternators.
Txawm li cas los xij, crankshafts siv ntau hom kabmob sib txawv, tsawg dua cov kabmob: ob lub semi-cov phaj hlau, hu ua zawv zawg bearings. Vim tias lawv zoo li cov vuas vov tsev, lawv feem ntau hu ua "cov kabmob plhaub."
Los ntawm lawv cov tsos ib leeg, ntau tus neeg yuav tsis xav tias cov kabmob muaj dab tsi ua nrog txo kev sib txhuam. Tab sis hom kabmob no yog siv rau ntawm lub cav crankshafts, thiab nws tseem yog cov kabmob zawv zawg siv ntawm lub crankshaft thiab txuas rods.