Ibyo biti birangwa nuburyo bwa silindrike hamwe nizunguruka zitondekanye kuri perpendicular kumurongo wo kuzunguruka.Imizingo iyobowe ninzira nyabagendwa kumpeta y'imbere ninyuma, ibafasha kwihanganira imitwaro ya radiyo na axial.Hamwe niki gishushanyo kidasanzwe, ibyuma byacu bya silindrike birashobora kugera ku muvuduko mwinshi no kugenda neza, bigatuma biba byiza gukoreshwa mubikorwa biremereye nkibikoresho byimashini, ibikoresho byubwubatsi, hamwe na sisitemu yimodoka:
1. Imirongo imwe ya silindrike yerekana: NU, NJ, NUP, N, NF nizindi seri.
2. Imirongo ibiri ya silindrike yerekana: NN, NNU, NNF, NNCL nizindi seri.