Kev sib kis ntawm cov cuab yeej sib xyaw muaj xws li lub cev muaj zog, gearbox, coupling, bearings, thiab ncej. Kev sib xyaw tsav tsheb feem ntau siv kev sib xyaw ua ke ntawm lub tshuab hluav taws xob thiab lub tshuab hluav taws xob, lossis lub cev muaj zog nrog lub tshuab hloov zaus, kom ua tiav qhov kev sib xyaw uas yuav tsum tau ua.
Kev ua haujlwm ntawm kev sib kis yog tig lub tshuab sib xyaw ntawm qhov xav tau ceev thiab xyuas kom meej tias cov khoom sib xyaw tau txais qhov tsim nyog torque. Hauv cov khoom siv sib xyaw feem ntau, tsuas muaj ib qho sib xyaw ua ke, thiab cov agitator tig ntawm qhov ceev tsis tu ncua hauv ib qho kev taw qhia. Txawm li cas los xij, qee cov khoom siv tshwj xeeb sib xyaw, kom ua tiav cov txiaj ntsig zoo sib xyaw, tuaj yeem siv ob qhov sib xyaw ua ke hauv ib chav tsev, tso cai rau tus neeg ua kom lub zog ua haujlwm nyuaj, xws li reciprocating, planetary, thiab lwm yam.