Iiwasha zidla ngokuba yintsimbi okanye iplastiki.Umgangatho ophezulu we-bolted joints ufuna i-washers yensimbi eqinile ukukhusela ukulahleka komthwalo wangaphambili ngenxa ye-brinelling emva kokuba i-torque isetyenziswe.Iiwasha zikwabalulekile ekuthinteleni ukubola kwegalvanic, ngakumbi ngokufaka i-insulating steel screws ukusuka kumphezulu we-aluminiyam.Zisenokusetyenziswa kwizicelo ezijikelezayo, njengokuthwala.Iwasha i-thrust isetyenziswa xa i-rolling element ingafuneki ngokwembono yendleko-yokusebenza okanye ngenxa yothintelo lwendawo.Iingubo zokwaleka zingasetyenziselwa ukunciphisa ukuguga kunye nokukhuhlana, mhlawumbi ngokuqinisa umphezulu okanye ngokubonelela nge-lubricant eqinileyo (oko kukuthi umphezulu wokuzithambisa).
Imvelaphi yegama ayaziwa;Ukusetyenziswa kokuqala kwegama elirekhodiweyo kwakungo-1346, nangona kunjalo, ixesha lokuqala ukuchazwa kwalo kwabhalwa ngo-1611.
Irabha okanye iigaskithi zefiber ezisetyenziswa kwiimpompo (okanye iitepu, okanye iivalvu) njengokutywina ngokuchasene nokuvuza kwamanzi ngamanye amaxesha zibhekiswa kuzo njengeewasha;kodwa, ngelixa zinokubonakala zifana, iiwasha kunye neegaskets zihlala ziyilelwe imisebenzi eyahlukeneyo kwaye zenziwe ngokwahlukileyo.
Uninzi lweewasha zingahlelwa kwiintlobo ezintathu ezibanzi;
Iiwasha ezingenanto, ezisasaza umthwalo, kwaye zithintele ukugcinwa komonakalo kumphezulu, okanye ukubonelela ngohlobo oluthile lokugquma okufana nombane.
Iiwasha zasentwasahlobo, ezinokuguquguquka kwe-axial kwaye zisetyenziselwa ukuthintela ukuqina okanye ukukhulula ngenxa yokungcangcazela.
Ukutshixa ama-washers, okuthintela ukukhawuleza okanye ukukhulula ngokuthintela ukujikeleza okungahambiyo kwesixhobo sokuqinisa;iiwasha zokutshixa zidla ngokuba ziiwasha zasentwasahlobo.