Axial Clamping Force Calculator

Formula

To calculate the clamping force:

\[ F = \frac{T}{K \times D} \]

Where:

\( F \) is the clamping force (N, lbs)
\( T \) is the torque applied to the bolt (N-mm, in-lb)
\( K \) is the friction of the bolt contact
\( D \) is the diameter of the bolt (mm, in)

What is Clamping Force?

A clamping force is a measure of the force applied to an object that is used to oppose separating forces that are trying to move that object from its current location.

Example Calculation

Let's assume the following values:

Torque Applied to the Bolt \( T \) = 500 N-mm
Friction Constant \( K \) = 0.2 (Steel)
Diameter of the Bolt \( D \) = 10 mm

Step 1: Multiply the friction constant by the diameter of the bolt:

\[ K \times D = 0.2 \times 10 = 2 \]

Step 2: Divide the torque by the result from step 1:

\[ F = \frac{500}{2} = 250 \text{ N} \]