文档介绍：NOTE: Save this master file as a new name and than use new file to do the calculations. Step 1: Define Bolt & Nut (Boss) Bolt P/N: Step 2: Plug in values for each area in blue Thread: Threads per inch Tpi 32 Nut P/N: 1/Tpi P Thread: Nomal Dia, bolt (mm) D b6 Application: Major Dia, bolt (mm) d (min) Pitch Dia, bolt (mm) d 2 (min) 6 Minor Dia, nut (mm) D 1 (max) Pitch Dia, nut (mm) D 2 (max) 5 Safety Factor (90%) F s Length, Engagement (mm) L e 10 Proof Strength, bolt (MPa) St (min) 200 * Yield Strength, nut (MPa) Si (min) 200 Torque Coefficient K Constant pi Constant tan 30 ° Constant tan 60 ° * Proof Strength ? Yield Strength ? Method 1: Maximum bolt load based upon shear stress in the bolt thread . Shear Area, bolt (mm 2) A s Tensile Load, bolt (N) P s ? Method 2: Maximum bolt load based upon shear stress in the internal thread . Shear Area, nut (mm 2) A i Tensile Load, nut (N) P i ? Method 3: Maximum bolt load based on tensile failure of bolt . Tensile stress area, bolt A t Tensile load, bolt (N) P t ? Result : Maximum allowable torque based upon minimum bolt load of3 methods. Applicable Load (N) Fi Torque () T Step 3: If there are any thermal effects in the assembly a temperature correction factor may need to be applied to the proof or yield strength. Ste