Tshwj tsis yog tias tus neeg siv khoom tau teev tseg, cov kav hlau steel nrog cov phab ntsa thickness ntau dua 3.2 hli yuav tsum muaj bevel ntawm 3 0 degree rau 35 degree ; lub hauv paus lub ntsej muag yuav tsum yog 1.6 ± 0.8 hli, thiab lub bevel lub kaum sab xis yuav tsum tau ntsuas los ntawm lub perpendicular mus rau lub axis ntawm cov yeeb nkab steel.
Cov yeeb nkab kawg txiav txoj kab nqes yuav tsum tsis pub tshaj 1.6mm. Rau GB/T3091 cov khoom thiab SY/T5037 cov khoom uas muaj cov yeeb nkab diameters D Ntau dua los yog sib npaug rau 813mm, qhov kev txiav txoj kab nqes siab tuaj yeem ua rau 3.0mm.
Txhawm rau tshem tawm cov burrs sab hauv tshwm sim thaum lub sijhawm ua tiav cov yeeb nkab, lub chamfer ntawm cov yeeb nkab kawg yuav tsum tsis pub tshaj 7 degree, thiab nws qhov ntsuas yuav tsum yog raws li qhov nruab nrab ntawm cov yeeb nkab steel.
