Ƙunƙwasa ya ƙunshi zobba na ciki da na waje, abubuwa masu juyawa (ƙwallaye, rollers ko allura) da masu riƙewa.Sai dai mai riƙewa, sauran ya ƙunshi ƙarfe mai ɗaukar nauyi.Lokacin da maɗaurin ke aiki, ɗaukar nauyi, zobe na waje da juzu'in jujjuyawar jiki suna fuskantar babban mita da damuwa mai canzawa.Yanayin aiki na bearings suna da rikitarwa sosai.Load ɗin yana maida hankali kan ƙaramin yanki na jujjuyawar jiki.A ka'ida, don kwallon, yana aiki akan batu ɗaya;don abin nadi, yana aiki akan layi, kuma wurin hulɗa tsakanin nau'in mirgina da ferrule shima ƙarami ne (madaidaicin lamba / layin layi), don haka lokacin da sassan masu ɗaukar nauyi suna aiki, Yankin saman na ɓangaren mirgina da ferrule yana fuskantar babban matsin lamba, gabaɗaya har zuwa 1500-5000 N/mm2;lokacin da jujjuyawar ke juyawa, shima dole ne ya jure ƙarfin centrifugal, kuma ƙarfin yana ƙaruwa tare da haɓaka saurin juyawa;abubuwan da ke jujjuyawa da hannun riga Ba wai kawai juzu'i ba ne har ma da zamewa tsakanin zoben, don haka akwai juzu'i tsakanin abubuwan naɗawa da ferrule.Ƙarƙashin aikin haɗin gwiwar da yawa na sama, an fara haifar da tsagewar gajiya a saman ferrule ko jikin da ke jujjuyawa tare da ƙarancin ƙarfin gajiya, kuma a ƙarshe ana samun bawon gajiya, ta yadda ɗaukar nauyi ya karya tasirin asara.Sigar lalacewa ta al'ada ta ɗaukar nauyi ita ce lalacewar gajiyar hulɗa, kuma nakasar filastik, shigar ciki, lalacewa, fasa, da sauransu sun zama ruwan dare.

Rayuwar rayuwa da aminci suna da alaƙa da ƙirar ƙira, masana'anta, yanayin lubrication, shigarwa, kiyayewa da sauran dalilai, amma babban inganci da amincin kayan haɓaka shine mabuɗin.Abubuwan jujjuyawar jujjuyawar suna aiki ƙarƙashin yanayi mai tsayi da tsayin daka ƙarƙashin rikitattun jihohin damuwa kamar juzu'i, matsawa, lankwasa, sausaya, musanyawa, da ƙimar damuwa mai girma.Don haka, abubuwan da ake buƙatu don birgima sune:

1) babban juriya ga nakasar filastik,

2) high anti-gogayya da lalacewa Properties,

3) Babban jujjuya daidaito da daidaiton girma,

4) kwanciyar hankali mai kyau,

5) Tsawon rayuwar sabis da babban abin dogaro.

Don bearings da ke aiki a ƙarƙashin yanayi na musamman, akwai buƙatu na musamman kamar babban juriya na zafin jiki, ƙarancin zafin jiki, juriya na lalata da juriya na diamagnetic, da sauransu.