Related Resources: calculators
Thread Shear Area Formulas and Calculator per. ASME B1.1
ANSI Hardware Design Guide and Charts
Tolerances, Engineering Design & Limits & Fits
Fastener, Bolt and Screw Design Torque and Force Calculations
Thread Shear Area for External and Internal Formulas and Calculator per. ASME B1.1
The following formulas for thread shear areas are geometric minimum values. Shear ( thread stripping) strengths of screw threads under load are dependent, in addition, on mating component relative material strengths, nut geometry, and coefficient of friction between thread bearing surfaces. Effective shear areas are therefore somewhat less than the geometric values.
Preview- Thread geometric shear areas calculator
Thread geometric shear areas:
Eq. 1
As = π · n · Le · Knmax [ 1 / ( 2 · n ) + 0.57735 · ( Esmin - Knmax) ]
Eq. 2
An = π · n · Le · Dsmin [ 1 / 1/n + 0.57735 (Dsmin - Enmax )]
For thread dimensional data see:
External Screw Thread Pitch, and Major Diameter Data
Internal Screw Thread Pitch, and Major Diameter Data
where
An = minimum thread shear area for internal threads
As = minimum thread shear area for external threads
1/P = number of threads per inch
Le = length of engagement
Knmax = maximum minor diameter of internal thread
Esmin = minimum pitch diameter of
the external thread for the class of thread specified
Dsmin = minimum major diameter of
the external thread
Enmax = maximum pitch diameter of internal thread.
Reference:
Machinerys Handbook, 30th Edition
Related:
- Screw Threads Size Chart Table
- Screw Stress Area 100 ksi & Greater
- Bolt Stress Area less Than 100 ksi
- Bolt Elongation Equation and Calculator while under Axial Stress
- Fastener / Thread Tensile Area of External Thread Formula
- Fastener / Threaded Pitch Circle Diameter Formula and Calculation
- Fastener / Threaded Shear Area Formula and Calculation