Ƙaƙwalwar ƙwallon ƙafa ta ƙunshi hanyoyin tsere na ciki da na waje, abubuwa da yawa masu sassauƙa da mai ɗaukar hoto ya raba, kuma, sau da yawa, garkuwa da / ko hatimi waɗanda aka tsara don kiyaye ƙazanta da maiko a ciki. Lokacin shigar, tseren ciki sau da yawa ana dannawa a hankali a hankali. wani shaft da kuma tseren waje da aka gudanar a cikin gidaje.Ana samun ƙira don ɗaukar nauyin nauyin radial mai tsabta, nauyin axial (tuntsi) mai tsabta, da kuma haɗaɗɗen radial da axial.

An siffanta ƙwallo masu ɗauke da alamar lamba;wato, kowace ball tana tuntuɓar tseren a cikin ɗan ƙaramin faci - ma'ana, a ka'idar.An tsara nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nakasar da ƙwallon ke yi yayin da yake jujjuyawa a ciki da kuma fita daga yankin da ake ɗauka ba zai wuce ma'aunin abin da ake samu ba;ƙwal ɗin da aka sauke ta dawo zuwa ainihin siffarta.Ƙwallon ƙafa ba su da rayuka marasa iyaka.A ƙarshe, suna kasawa daga gajiya, zubewa, ko kowane adadin wasu dalilai.An tsara su bisa tsarin ƙididdiga tare da rayuwa mai amfani inda ake sa ran wani adadi zai gaza bayan adadin juyi.

Masu masana'anta suna ba da radiyon radial-jere ɗaya a cikin jeri huɗu akan kewayon daidaitattun masu girma dabam.An ƙera na'urorin tuntuɓar maƙwabta don jure wa lodin axial a hanya ɗaya kuma ana iya ninka har sau biyu don ɗaukar nauyin turawa ta hanyoyi biyu.

Daidaitaccen shaft da juzu'i suna taka muhimmiyar rawa wajen ɗaukar rayuwa.Don mafi girman iyawar rashin daidaituwa, ana amfani da maƙallan daidaita kai.

Don ƙara ƙarfin radial-loading, an kawar da mai ɗaukar kaya kuma sarari tsakanin tseren ya cika da yawan kwallaye kamar yadda zai dace - abin da ake kira cikakken haɗin gwiwa.Sawa a cikin waɗannan bearings ya fi waɗanda ke amfani da masu ɗauka saboda shafa tsakanin abubuwan da ke gaba.
A cikin aikace-aikace masu mahimmanci inda shaft runout ke da damuwa-mashin kayan aikin injin, alal misali-ana iya riga an loda nau'ikan bearings don ɗaukar kowane izini a cikin taron ɗaukar nauyi da aka rigaya ya jure.