Gear usheeda dhexe ee forgings sida waafaqsan qaabka dhidibka, usheeda dhexe waxaa loo qaybin karaa crankshaft iyo usheeda dhexe toos ah laba qaybood. Marka loo eego awoodda xajinta ee shafka, waxa loo sii kala qaybin karaa:
(1) Usheeda dhexe, marka la shaqeynayo, waxay sitaa daqiiqad foorarsi iyo wareeg ah labadaba. Waa shafka ugu badan ee mishiinada, sida shafka ku jira wax-yarayaasha kala duwan.
(2) mandrel, loo isticmaalo in lagu taageero qaybaha wareega oo kaliya sita daqiiqad foorarsiga oo ha wareejin torque ah, qaar ka mid ah wareegyada mandrel, sida usheeda dhexe gaariga tareenka, qaar ka mid ah mandrel ma wareegaan, sida usheeda dhexe taageero, iwm.
(3) usheeda dhexe, inta badan loo isticmaalo in lagu wareejiyo torque iyada oo aan la foorarsan daqiiqad, sida usheeda dhexe dheer ee farsamada wiish mobile, usheeda dhexe ee baabuurka, iwm.