Sprocket ke gear e tiileng kapa e builoeng e kopanyang ka ketane (rolara) ho fetisa motsamao. Lebili la sprocket la mofuta oa cog le sebelisetsoa ho kopanya boloko bo nang le molumo o hlakileng holim'a ketane ea khokahanyo kapa thapo.

Sebopeho sa leino la sprocket se tlameha ho etsa bonnete ba hore ketane e kena le ho tsoa meshing hantle le ho boloka matla, e fokotsa tšusumetso le khatello ea maikutlo ea lihokelo tsa ketane nakong ea meshing, 'me e lokela ho ba bonolo ho e sebetsa.

Mekhahlelo ea mantlha ea sprocket ke sekontiri se metsi, bophara ba bokantle ba rolara, palo ea meno le bophahamo ba mola. Bophara ba sedikadikwe sa index, bophara ba ntlha ya leino le bophara ba sedikadikwe sa leino la sprocket ke tsona tse ka sehloohong tsa sprocket.
Li-sprockets tse nang le li-diameter tse nyane li ka etsoa ka karolo e le 'ngoe; li-sprockets tse nang le bophara bo bohareng li entsoe ka marang-rang kapa lipoleiti tse nang le perforated; li-sprockets tse nang le li-diameter tse kholoanyane li entsoe ka mohaho o kopantsoeng, hangata ka li-gears tse ka nkeloang sebaka tse tlamelletsoeng setsing.

Sprocket e nang le bophara bo bonyenyane hangata e etsoa mofuta oa bohlokoa, 'me sprocket e bohareng ba bophara hangata e etsoa mofuta oa poleiti e buuoang. Ho nolofatsa ho sebetsana, ho jara le ho fokotsa boima ba 'mele, sekoti se etsoa ka poleiti e buuoang,' me sprocket e kholo ea bophara e ka etsoa ka mofuta o kopantsoeng. Ring le mokokotlo oa lebili li ka etsoa ka lisebelisoa tse fapaneng.

Thepa ea sprocket e lokela ho etsa bonnete ba hore meno a gear a na le matla a lekaneng le ho hanyetsa, kahoo leino la sprocket hangata le phekoloa mocheso ho fihlela boima bo itseng.