1. Ibizunguruka bihuza umurongo n'inzira nyabagendwa, bifite ubushobozi bunini bwo gutwara imirasire, kandi birakwiriye kwikorera imitwaro iremereye kandi ihungabana.

2. Coefficient de friction ni nto, ikwiranye n'umuvuduko mwinshi, kandi umuvuduko wo kugabanya wegereye imipira yimbitse.

3. Moderi N na NU zirashobora kwimuka, zirashobora guhinduka muguhindura imyanya igereranije ya shaft hamwe namazu kubera kwaguka kwinshi cyangwa amakosa yo kwishyiriraho, kandi birashobora gukoreshwa nkubufasha bwanyuma.Impeta y'imbere cyangwa hanze irashobora gutandukana kugirango byoroshye kuyikuramo no kuyikuraho.

4. Ibisabwa gutunganyirizwa mu mwobo no mu cyicaro ni hejuru.Kugereranya gutandukanya impeta y'imbere n'inyuma nyuma yo kwishyiriraho bigomba kugenzurwa cyane kugirango wirinde gutera impungenge.

5.Imirongo ibiri-ya silindrike ya roller ifite icyuma cya 1:12 imbere muri bore.Imirasire yumurongo irashobora guhindurwa kandi ubukana bwa radiyo ni ndende, ikwiranye nigikoresho cyimashini.