isibhakabhaka ne gear box yenqaba
I-rack nakanye i-pinon ingxenye yemisebenzi yemifanekiso engxenye yoku guqula imisebenzi yoku chasana ngokuphumelelayo ngokuxhumiwa kwezinto ezimbili eziphambene: igi (pinion) enkulu nezicathu ezinemilenze (rack). Le ngxenye yemisebenzi yenzelwe ukuba yisisekelo sabasebenzi ngokwehlukanenkulu, kusuka kwiindlela zokulawula zezimoto kumaqhawuli amathontela. Le ngxenye isebenza ngokweqondo elula lapho imilenze yesithathu ingxenye ye-rack, yenza ukuba kube nemisebenzi emihliziyweni ngokuphelele lapho igi iphumelela. I-rack nakanye i-pinon ingxenyelwe ngokuthuthukisa imishini nemisebenzi yokuqondisa ukuthi yenzelwe ngokuphelele nokuphumelela. Le ngxenye yenziwe ngokucacile kwezinto ezifanayo nezindlela zokulandela, ukulinganisa imilenze, ukulinganisa izici nezindlela zokulandela ukuthenga kakhulu nokuthenga kakhulu. Ukusebenzisa le ngxenye kungenzeka ukuba kube yisicaba noma isihlo, ukwenza yona le ngxenye yenzeka ukwenzela imisebenzi yemifanekiso. Ngokudla, i-rack nakanye i-pinon ingxenyelwe ngokuthuthukisa izindlela zokulandela, izicathu zokulandela, nezindlela zokulandela ukuthi yenzelwe ngokwezidingo zokulandela nezimo zokulandela.