Thread Pull Out Force Calculator

Formula

The formula to calculate the thread pull out force is:

\[ F = \frac{A \times S}{SF} \]

Where:

\( F \) is the pull out force (pounds)
\( A \) is the stress area (square inches)
\( S \) is the tensile strength (psi)
\( SF \) is the safety factor

What is Thread Pull Out Force?

Thread pull out force is the force required to pull a threaded connection out of its engagement. It is a critical value in engineering design, particularly in applications where mechanical fasteners are used. The pull out force depends on the material properties, the geometry of the threads, and the safety factor applied to ensure the connection remains secure under expected loads.

Example Calculation

Let's assume the following values:

Stress Area (A) = 0.05 square inches
Tensile Strength (S) = 60000 psi
Safety Factor (SF) = 2.5

Using the formula:

\[ F = \frac{0.05 \times 60000}{2.5} = 1200 \, \text{pounds} \]

The pull out force (F) is 1200 pounds.