Iibheringi zebhola ezenzelwe ukujamelana nokuthwala umthwalo ngexesha lokusebenza ngesantya esiphezulu, kwaye zenziwe ngee-ferrules ezimile ngohlobo lwe-washer ezineebhola zokuqengqeleka kwebhola. Ngenxa yokuba iringi ikwimo yomqamelo, iibheringi zebhola ezikhutshiweyo zahlulwe zaziindidi ezimbini: uhlobo olusebenzayo lomqamelo wesiseko kunye nohlobo oluzimeleyo lokulungelelanisa uhlobo lomqamelo. Ukongeza, olu hlobo lokuthwala lunokuthwala umthwalo we-axial, kodwa alunakuthwala umthwalo we-radial.
