Amabheringi ama-roller eyindilinga ngamabombo anama-roller amise okwedramu ahlanganiswe phakathi kwendandatho yangaphakathi enemigwaqo emibili kanye nendandatho engaphandle enemigwaqo eyindilinga.
Amabheringi ama-roller eyindilinga anemigqa emibili yama-roller, ikakhulukazi athwala imithwalo esabalalayo, kepha futhi angathwala imithwalo ye-axial kunoma iyiphi indlela.
Inomthamo omkhulu wokulayisha osabalalayo, ikakhulukazi ofanele ukusebenza ngaphansi komthwalo osindayo noma umthwalo wokudlidliza, kepha awukwazi ukuthwala umthwalo we-axial omsulwa. Umzila wangaphandle wendandatho walolu hlobo lokuthwala uyindilinga, ngakho-ke ukusebenza kwawo kokuqondanisa kuhle futhi kungakhokhela iphutha le-coaxiality.
