Pob kabmob yog ib hom kev yob cov kabmob. Cov pob pov npav tau nruab ntawm nruab nrab sab hauv thiab sab nrauv steel thiab muaj peev xwm tiv tau qhov kev thauj khoom loj. Kuj tseem hu ua pob kabmob.
Cov kabmob pob tsuas yog tsim los ntawm plaub qhov yooj yim: pob, lub nplhaib puab, sab hauv lub nplhaib thiab khaws cia, kuj hu ua tawb lossis khaws khoom. Kev lag luam dav dav pob bearings tau raws li AISI 52100 tus qauv. Cov pob thiab cov nplhaib feem ntau yog ua los ntawm high chromium steel nrog Rockwell C-nplai tawv ntawm 61-65. Lub hardness ntawm lub tawb yog qis dua li ntawm cov pob thiab cov nplhaib, thiab nws cov khoom siv yog hlau (xws li: nruab nrab carbon steel, aluminium alloy) lossis tsis yog hlau (xws li: Teflon, PTEF, cov ntaub ntawv polymer). Cov kabmob pob muaj qis dua kev sib txhuam tig dua li cov ntawv sau xov xwm kabmob, yog li ntawm tib lub nrawm, qhov kub ntawm kev sib txhuam yuav qis dua.
Lub hom phiaj ntawm pob kabmob yog los txiav txim siab qhov chaw txheeb ze ntawm ob ntu (feem ntau yog ua haujlwm thiab lub rooj zaum cov kabmob) thiab xyuas kom lawv cov kev sib hloov dawb, thaum xa cov thauj mus los ntawm lawv. Thaum muaj kev kub ceev (xws li hauv gyro pob bearings), qhov kev siv no tuaj yeem txuas ntxiv kom muaj kev sib hloov dawb nrog yuav luag tsis muaj hnav nyob rau hauv cov bearings. Yuav kom ua tiav lub xeev no, cov kua nplaum nplaum zaj duab xis hu ua elastic hydrodynamic lubrication film tuaj yeem siv los cais ob ntu ntawm cov kabmob. Denhard (1966) tau qhia tawm tias lub elasticity tuaj yeem tswj tsis tau tsuas yog thaum cov kabmob ntawm lub luag haujlwm ntawm lub nrav, tab sis kuj thaum tus kabmob raug thau ua ntej kom txoj haujlwm tso qhov tseeb thiab qhov ruaj khov ntawm tus ncej tsis dhau 1 microinch lossis 1 nanoinch Hydrodynamic lubrication zaj duab xis.
