Answer
Lokacin da aka matsa zoben riƙon karkace na ciki don shigarwa cikin gida, yana fuskantar 'iska-ƙasa' inda yawancin jujjuyawar zamewar karkace da juna. Idan zoben ya cika matsewa, jujjuyawar na iya zoba ko kuma 'gida' ba daidai ba, wanda zai haifar da raguwa na dindindin a diamita na kyauta. Ana rage wannan ta hanyar amfani da 'tsayawa' akan kayan aikin shigarwa don hana matsawa fiye da inda OD's zobe ya ɗan ƙanƙanta da ID na gida. Bugu da ƙari, ƙirar zoben ya kamata ya haɗa da 'cire ƙima' ko 'offset' wanda ke ba da damar jujjuyawar motsi cikin yardar kaina ba tare da kama juna ba. Lubriation mai kyau yayin shigarwa yana ƙara rage juzu'i tsakanin jujjuyawar, yana tabbatar da cewa zoben yana 'snaps' cikin tsagi tare da cikakkiyar lamba ta radial.
