
rullaluistudhka xadhkaha goosanaysa waa unug-wareejin sax ah oo loo qaabeeyey in lagu qabto culaysyada radial iyo hal jiho culus oo isku mar ah. Magaceeda joomatari conical conical waa furaha, taas oo u sahlaysa in ay si hufan u maarayso oo ay u gudbiso culaysyadan la isku daray.
Roollada caadiga ah ee duuban waxay ka kooban tahay afar qaybood oo waaweyn:
Lagu qiimeeyay awoodooda culeyska adag iyo meelaynta saxnaanta, rullaluistuyada duuban ayaa si weyn loogu isticmaalaa codsiyada dalbanaya ee ku lug leh rarka culus iyo shoogga, sida:
Xirmooyinka duuban ayaa ah xalka ugu habboon ee la isku halayn karo, hufan, iyo taageerada wareeg ee saxda ah ee codsiyada mashiinnada muhiimka ah.