T=(0.5~0.7)*k*σs*As*d/1000
Ntawm lawv,
T: nruj torque, Nm
k: nruj coefficient, feem ntau 0.12
σs: bolt khoom tawm los lub zog, Mpa
Raws li: txaus ntshai cheeb tsam Cross-sectional, mm2
d: Nominal txoj kab uas hla, mm

Hebei Chengyi Engineering Materials Co., Ltd. tau cog lus rau kev tsim khoom thiab kev loj hlob ntawm ntau yam fasteners. Cov khoom siv dav siv hauv hluav taws xob, steel qauv, kev tsim kho, mining, photovoltaic, machinery, tsheb thauj mus los, railway thiab lwm yam kev lag luam. Kev tswj hwm qhov system muab cov neeg siv khoom nrog cov ncauj lus kom ntxaws, saib xyuas thiab lees paub qhov kev pabcuam ib-nres.