I. Liggéey
Roulement yi dañuy jëfandikoo gap bi diggante bul bi ak ring yi ci biir. Su force bi di doxalee ci biir bul bi, dañu koy joxe ci diggu roulement bi, di soppi doole ji ci biir ak ci biti, mu nekk doole bu jub ci axis bi. Doole jii dafay wàññi bu baax wearu roulement bi ak friction.
II. Xeetu xam-xam
Roulement yi am nañu ci ñaari xeeti: {-row ak ñaari-row. Benn ci roulement yi ci boule bu xóot, roulements boule angular, ak sa bopp {4}aligning roulement boule; Ñaari roulements yu njëkk yi ñooy ñaari {6} roulements boule angular ak ñaari-al boppam {8}aligning roulements.
III. Njariñ yi ak jafe-jafe yi
Roulement yi ci biir bi dafay am njariñ yu melni kàttan yu bari, liggéey bu baax, ak dundu liggéey bu yàgg. Rax ci dolli, dañu am koefficient bu néew ci friksioŋ, gaawaay bu rëy, ak jafe-jafe yu néew, loolu moo leen gëna baax ci frequency yu gëna kawe ak gaawaay. Waaye, amna ñu itam lu am njariñ lu ci melni tëj bu baax, mën nañu baña am contamination, ak kàttanu yab bu woyof.
IV. Aplikaasioŋ
Roulement yi dañu leen di jëfandikoo bu bari ci jumtukaayi mekanik yu bari, lu ci melni oto, roppalaan, saxaar yu kawe- yu gaaw, ak masin yuy yéeg. Rax ci dolli, roulement yi ci boule yi mën nañu itam am jumtukaayi masin yu bari- yu gaaw, jumtukaayi masin yu jub, jumtukaayi otomatisation ak yeneen barab.
