Imipira yinyuma yinyuma mubyukuri ni itandukaniro ryumupira wimbitse wimbitse, irangwa nuko ubuso bwa diametre yinyuma yimpeta yacyo yo hanze kandi bushobora gushyirwa mubuso bujyanye nuburinganire bwintebe yintebe kugirango bikine- guhuza uruhare.

Nubwo imikorere yibanze igomba kuba isa niy'imipira yimbitse ya ruhago, ariko kubera ko ibyo byuma bikoreshwa cyane cyane mumashini igereranije, kwishyiriraho no guhagarara ntibisobanutse bihagije, umurongo wigitereko nu mwobo wintebe ntabwo uhujwe neza, cyangwa igiti ni kirekire kandi kirayobye.Mugihe cyamanota manini, kandi ubunyangamugayo bwo kwifata ubwabwo ntabwo buri hejuru bihagije, kandi ibyubatswe bimwe birasa nkaho bigoye, imikorere nyayo yimikorere isanzwe iragabanywa kubutaka bwimbitse bwumupira wibisobanuro bimwe.Kurugero, umupira wo hanze wifitemo umugozi wo hejuru ukoreshwa kumurongo unyuze hamwe no gukomera.Ubu bwoko bwo kwifata bufite impeta zifunga impande zombi kugirango wirinde gutera umwanda cyane.Yuzuyemo amavuta akwiye ku ruganda kandi ntabwo akeneye kozwa mbere yo kuyashyiraho.Nta yandi mavuta akenewe, mugihe umugozi wo hejuru kumpera yimpera yimpeta yimbere yiziritse kumutwe.Umutwaro wemewe wa axial ntugomba kurenza 20% yumutwaro uteganijwe.

Imikorere yumupira winyuma winyuma ufite amaboko ya eccentricique ahanini ni nkay'umubumbe wo hanze ufite insinga zo hejuru, usibye ko insinga yo hejuru itari ku mpeta y'imbere ahubwo iri ku ntoki ya eccentric.Umwobo w'imbere wumupira winyuma wikurikiranya ufite umwobo wapanze ni umwobo wapanze ufite icyuma cya 1:12, gishobora gushirwa muburyo butaziguye ku rufunzo rwafashwe, cyangwa rugashyirwa ku rufunzo rwa optique rudafite urutugu hakoreshejwe igihuru gihamye, kandi ibyangiritse birashobora gutegurwa neza.