Kuthamanga ndi mphamvuzida zamkati zozunguliraPa makina ochepetsera ma gearbox a mapulaneti, njira yachikhalidwe imagwiritsa ntchito njira yopangira mano kapena yopangira mano. M'zaka zaposachedwa, kugwiritsa ntchito njira yopangira mano pamodzi ndi njira zina popangira zida zogwirira ntchito kwapindulanso bwino pazachuma. Kuthamanga kwambiri, komwe kumadziwikanso kuti kupanga ma hobbing kumaphatikiza ma hobbing, ndi njira yodulira ma gear mosalekeza. Ukadaulo uwu umaphatikiza njira ziwiri zopangira ma gear ndi kupanga ma gear. Kuchokera pamalingaliro aukadaulo, ndi njira yopangira pakati pa "mano opangidwa" ndi "kupangira ma gear", komwe kumatha kupangitsa kuti ma gear agwire ntchito mwachangu ndi zofunikira zolimba. Kutengera ndi zofunikira za gawo, makina otchingira amatha kumangidwa pa maziko a shaft oyima kapena maziko a shaft yopingasa. Kapangidwe kakang'ono, kukhazikika kwa kutentha kwa makinawo komanso kulondola kwakukulu kwa ma hydraulic kumatsimikizira mtundu wa makina opangira mano, zomwe zimapangitsa kuti gawo lomaliza likhale lolimba kwambiri. Kutengera ndi momwe amagwiritsidwira ntchito, makina otchingira amatha kuphatikizidwa ndi skiving ndi kutembenuza nkhope, kapena kuphatikiza ndi hobbing, kuboola, kugaya kapena ma helical gear owongoka, zomwe zimapangitsa kuti ikhale njira yabwino kwambiri m'malo mwa ma gear.
Kuchita bwino kwa njira yopangira ma gear skiing ndi kwakukulu kuposa momwe ma gear hobbing kapena ma gear shaping amagwirira ntchito. Makamaka pankhani ya kuwonjezeka kosalekeza kwa ma gear amkati omwe amagwiritsidwa ntchito popanga zida zotumizira ma gear m'nyumba, ma gear skiving ring amphamvu omwe amagwiritsidwa ntchito mkati mwake amakhala ndi mphamvu zambiri pakupanga komanso mphamvu zambiri kuposa ma gear shaping.