Ingalo ye-rocker emotweni empeleni iyi-lever ehlolwe kabili ehlukanisa amandla endodeni ye-push futhi isebenza ekugcineni kwenduku ye-valve ukusunduza i-valve. Isilinganiso sobude bengalo kuzo zombili izinhlangothi ze-rocker ingalo zibizwa ngokuthi i-rocker arm ratio, ezingaba ngu-1.2 ~ 1.8. Ukuphela okukodwa kwengalo ende kusetshenziselwa ukucindezela i-valve. Indawo esebenzayo yekhanda le-rocker arm ngokuvamile yenziwa ngesimo se-cylindrical. Lapho ingalo ye-rocker iguquka, ingagingqa ubuso bokuphela kwenduku ye-valve, ukuze amandla phakathi kwalokhu amabili angenza eceleni kwe-axis valve ngangokunokwenzeka. Ingalo ye-rocker nayo idonswa ngamafutha okuthambisa kawoyela kanye namafutha. Isikulufa sokulungiswa kokulungisa imvume ye-valve ifakwa emgodini ofakwe intambo ekugcineni kwengalo emfushane yengalo ye-rocker. Ibhola lekhanda lesikulufa lixhumana ne-concave Tee phezulu kwenduku ye-push.
Ingalo ye-rocker ayinalutho isethwe ku-rocker arm shaft ngokusebenzisa i-rocker arm bushing, futhi eyokugcina isekelwa esihlalweni se-rocker arm shaft, bese ingalo ye-rocker iqhutshwa ngezimbobo zikawoyela.
Ingalo ye-rocker ishintsha ukuqondiswa kwamandla endongeni ye-push futhi ivula i-valve.
