Kumaphrojekthi wesakhiwo sensimbi yesikhala esikhulu se-span, ama-bearings ensimbi ayindilinga aqinile aqinile awuxhumo olubalulekile kanye nedivayisi ethwala umthwalo, umklamo wayo ohlanganisa ukuguquguquka kokugudluka okunezinhlangothi eziningi, ukumelana nokushuba kanye nezici zokuthwala umthwalo ophezulu.
Ama-bearings esakhiwo ayingxenye eyinhloko yanoma yisiphi isakhiwo ngoba axhuma isakhiwo esingaphezulu nesakhiwo esiphansi futhi adlulisele imithwalo eqondile nevundlile kuyilapho evumela ukuzungeza okulinganiselwe kunoma iyiphi i-eksisi evundlile.