Kayayyaki

Yumbu wani abu ne mai kama da gilashi, yana da ƙarancin gogayya kuma ya dace da aikace-aikace don rage gogayya da zafi. Ƙwallon yumbu yana buƙatar man shafawa kaɗan kuma yana da tauri fiye da ƙwallon ƙarfe wanda zai ba da gudummawa ga ƙaruwar rayuwar ɗagawa. Sifofin zafi sun fi ƙwallon ƙarfe kyau wanda ke haifar da ƙarancin samar da zafi a manyan gudu da kuma ɗaukar nauyin zafi mai yawa. Cikakken bearings na yumbu na iya samun abin riƙewa ko cikakken haɗin ƙwallo, kayan riƙewa da ake amfani da su sune PEEK da PTFE.

Bearings na ƙwallon yumbu suna amfani da ƙwallon yumbu. Nauyin ƙwallon yumbu ya yi ƙasa da ƙwallon ƙarfe, ya danganta da girmansa. Wannan yana rage lodin centrifugal da skidding, don haka bearings na yumbu masu haɗaka za su iya sauri fiye da bearings na gargajiya. Wannan yana nufin cewa ramin tsere na waje yana ƙara ƙarfi kaɗan a ciki yayin da bearings ke juyawa. Wannan raguwar ƙarfi yana rage gogayya da juriyar birgima. Ƙwallon mai sauƙi yana ba bearings damar juyawa da sauri, kuma yana amfani da ƙarancin kuzari don kiyaye saurinsa.