Countersinking yog siv los tshuab lub ntsej muag kawg ntawm lub qhov rau hauv tiaj tus, cylindrical, conical, thiab lwm yam profiled nto. Countersinking yog siv thaum machining cylindrical countersunk qhov, conical countersunk qhov, thiab kawg lub ntsej muag bosses rau ua ntej -machined qhov.
Lub tiaj tus- hauv qab countersink muaj ib lossis ntau dua txiav cov hniav ntawm nws qhov ncig thiab lub ntsej muag kawg. Daim ntawv qhia tau muab tso rau hauv qhov ua ntej - tshuab lub qhov los tswj cov coaxiality yuam kev ntawm lub qhov countersinked thiab lub qhov qub. Lub countersunk recess yog machined downwards.
Ib qho inclined qhov countersink muaj qhov tsis siv neeg qhov chaw nruab nrab. Feem ntau, machining conical qhov (countersunk recesses) los ntawm lub tiaj qhov tsis xav tau ib qho kev qhia; Txawm li cas los xij, lub laum me ntsis yuav tsum yog perpendicular rau lub dav hlau ntawm lub qhov. Conical countersinks muaj nrog ntau yam laum lub kaum sab xis ntawm 60 degree, 75 degree, 82 degree, 90 degree, 100 degree, 110 degree, thiab 120 degree. Cov kaum sib txawv tuaj yeem kho raws li qhov xav tau tiag tiag.
