Iiringi zangaphakathi nezangaphandle zinemizila yokurhafisa, kwaye kukho iiroller ezinamacwecwe phakathi kweendlela. Ukuba umphezulu opeyintiweyo uyandiswa, uya kuthi ekugqibeleni uhlangane kwindawo ekwi-axis ethweleyo. Iibheringi mqengqeleki tapered ubukhulu becala asetyenziselwa ukuthwala imithwalo ezihlangeneyo yezihlunu kunye yezihlunu, ikakhulu imithwalo zeradial. Umthwalo wokuthwala we-axial wokuthwala umiselwa yi-engile yokunxibelelana, enkulu i-eriyali ye-eriyali, kokukhona umthwalo we-axial uthwala amandla. Iibheringi mqengqeleki Tapered iibheringi ngokwahlukana. Iringi yangaphakathi eneziqengqeleki kunye nekheyiji yinto engaphakathi, enokufakwa ngokwahlukeneyo kwindandatho yangaphandle. Olu hlobo lokuthwala lunokunciphisa ukufuduka kwe-axial kwelinye icala leshafti okanye indlu, kwaye ayivumeli ishafti ithambeke xa kuthelekiswa nomngxuma wezindlu. Ngaphantsi kwesenzo somthwalo we-radial, amandla ongezelelweyo e-axial aya kwenziwa. Ke ngoko, ngokubanzi kwiibheringi ezimbini zokuthwala, umsesane wangaphandle kunye nomsesane wangaphakathi wokuthwala ufakelwe ngokuhambelana nobuso bokugqibela.