Hakazalika an gina su azaman bearings na ball, nadi bearings suna da lamba ta layi maimakon lamba, yana ba su damar mafi girma da juriya mai girma.Rollers da kansu suna zuwa da siffofi da yawa, wato, cylindrical, spherical, tepered, da allura.Silindrical roller bearings yana sarrafa ƙayyadaddun kaya masu iyaka.Wuraren abin nadi mai siffar zobe na iya ɗaukar rashin daidaituwa da ƙari, kuma, idan aka ninka sama, tura ta kowace hanya.Wuraren nadi da aka ɗora na iya sarrafa manyan lodin matsawa.Ƙaƙƙarfan allura, bambance-bambancen nadi na siliki, na iya ɗaukar manyan lodin radial don girmansu, kuma ana iya yin su azaman abin nadi na allura.

Abubuwan nadi suna samuwa azaman cikakkun ƙira da ɗigon allura kusan koyaushe zasu kasance na wannan salon.Ƙunƙarar allura tana da tasiri musamman tare da motsin motsi, amma juzu'i zai yi girma saboda abin nadi-da-nadi.

Lokacin amfani da nadi na silinda a kan ramuka tare da kuskuren kusurwa, an fi son amfani da gajerun nadi bearings guda biyu baya-baya maimakon tsayin abin nadi guda ɗaya.

Zaɓan Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwallon Ƙwa ) ko Ƙaƙa
A matsayin ka'ida ta gaba ɗaya, ana amfani da ƙwallon ƙwallon a mafi girman gudu da nauyi mai nauyi fiye da abin nadi.Gilashin abin nadi yana aiki mafi kyau a ƙarƙashin girgiza da ɗaukar nauyi.

Ana sayar da ƙwalƙwalwar ƙwallon ƙafa azaman majalisai kuma ana maye gurbinsu kawai azaman raka'a.Sau da yawa ana iya wargaje abubuwan nadi da nadi mai ɗaukar hoto da nadi, ko tseren waje ko na ciki, a maye gurbinsu daban-daban.Motoci masu tuƙi na baya suna amfani da irin waɗannan shirye-shiryen don ƙafafun gaba.Amfanin wannan ƙira shi ne cewa za a iya murƙushe tseren da ya dace a kan ramummuka da cikin gidaje don ƙirƙirar taro na dindindin ba tare da haɗarin lalacewa ga rollers da kansu ba.

Ƙwallon ƙwallon jere guda ɗaya an daidaita su kuma ana iya amfani da su ta musanyawa tsakanin masana'antun.Abubuwan nadi ba su da ƙayyadaddun ƙayyadaddun ƙa'ida don haka mai ƙididdigewa yana buƙatar tuntuɓar kasidar masana'anta don zaɓar wanda ya dace da aikace-aikacen.

Ana kera nau'ikan nau'ikan birgima tare da takamaiman adadin izinin ciki.Duk wani rashin daidaituwa wanda kawai ya nudge ball daga matsayi kuma ya cire wannan sharewar ciki bai kamata ya yi tasiri sosai a rayuwar abin da aka ɗaure ba.Nadi bearings sun fi kula da kuskuren kusurwa.Misali, mai ɗaukar ƙwallon ƙwallon yana gudana a matsakaicin gudu tare da daidaitaccen madaidaici zai iya aiki cikin nasara tare da kuskuren kusurwa kamar 0.002 zuwa 0.004 in./in.tsakanin bearing da shaft.Ƙaƙwalwar abin nadi na silinda, idan aka kwatanta, na iya zama cikin matsala idan rashin daidaituwa ya wuce 0.001 in./in.Gabaɗaya masana'antun za su samar da karɓuwa jeri na kuskuren kusurwa don ɗaiɗaikun ɗaiɗaikun su.