Xirmooyinka rullaluistuyada wareegsanwaa xajisyo leh rollers durbaan oo la isugu keenay inta u dhaxaysa giraan gudaha ah oo leh laba jid oo orod ah iyo giraan bannaan oo leh jidad orod wareegsan.Rullallallada wareegsan waxay leeyihiin laba saf oo rullaluistuyaal ah, kuwaas oo inta badan sidda culeysyo shucaac ah oo sidoo kale u adkeysan kara culeysyada dhidibka ah labada dhinacba.Iyada oo awoodda culeyska sare ee shucaaca, waxay si gaar ah ugu habboon tahay shaqada culeyska culus ama culeyska gariirka, laakiin ma qaadi karto culeys saafi ah.Jidka orodka ee giraanta dibadda ee nooca noocan ah waa mid wareegsan, sidaa daraadeed waxqabadkeeda is-waafajinta waa mid wanaagsan, waxayna magdhow siin kartaa qaladka coaxial.
Qaab-dhismeedka Gudaha iyo Kala duwanaanta Qalabka Haysta
C: rullaluistemadka simmetrical ah, Xajiye Bir ah oo Shaabadaysan
CA: rullaluistemadka simmetrical ah, qafis naxaas ah oo hal-pick ah oo wareegsan
CTN1: rullaluistemadka simmetrical ah, qafis naylon ah oo rullaluistemadka ah
E: Naqshadaynta jiilka saddexaad.qaybinta walbahaarka oo wanaajiyay;Bixi nolol adeeg aad uga dheer nashqadaha caadiga ah ee loo yaqaan 'Spherical Roller Bearing'
S: qafis naxaas ah oo ku duuban Roller Bearing
MB: rullaluistemiyad simman, Qafis naxaas ah oo laba xabbadood ah
EM: rullaluistemadka simmetrical ah, qafis isku dhafan oo gaar ah