Cov iav cylindrical yog cov khoom tseem ceeb hauv cov tshuab hluav taws xob sib kis, muaj npe nrov rau lawv cov kev ua tau zoo, kev yooj yim, thiab ntau yam. Cov iav no muaj cov hniav zoo li cylindrical uas mesh ua ke los hloov cov lus tsa suab thiab lub zog ntawm qhov sib npaug lossis sib tshuam.
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm cylindrical zog yog lawv lub peev xwm xa hluav taws xob zoo thiab ntsiag to, ua rau lawv zoo tagnrho rau ntau yam kev siv, los ntawm kev xa tsheb mus rau kev siv tshuab. Lawv muaj nyob rau hauv ntau yam configurations, nrog rau spur iav, helical iav, thiab ob chav helical iav, txhua qhov muab qhov tshwj xeeb zoo nyob ntawm daim ntawv thov.