1. What is Axial Clamp Force?

Axial clamp force is the force generated along the axis of a bolt when torque is applied. It's crucial for ensuring proper joint integrity in bolted connections.

2. How Does the Calculator Work?

The calculator uses the axial clamp force formula:

Where:

• \( F \) — Axial clamp force (N)
• \( T \) — Applied torque (Nm)
• \( K \) — Nut factor (unitless, typically 0.15-0.3)
• \( d \) — Bolt diameter (m)

Explanation: The formula shows that clamp force is directly proportional to torque and inversely proportional to both the nut factor and bolt diameter.

3. Importance of Axial Clamp Force Calculation

Details: Proper clamp force ensures joint integrity without overstressing bolts. Too little force can lead to joint separation, while too much can cause bolt failure.

4. Using the Calculator

Tips: Enter torque in Nm, nut factor (default is 0.2 for dry steel), and bolt diameter in meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical nut factor (K) value?
A: For dry steel on steel, K is typically 0.2. Lubricated joints may have K=0.15, while plated or coated surfaces may be higher.

Q2: Why does bolt diameter affect clamp force?
A: Larger diameter bolts require more torque to achieve the same clamp force due to increased friction radius.

Q3: How accurate is this calculation?
A: It provides an estimate. Actual force depends on surface finish, lubrication, and bolt condition. For critical applications, direct measurement is recommended.

Q4: What units should I use?
A: The calculator uses SI units: torque in Nm, diameter in meters, resulting in force in Newtons.

Q5: Can this be used for metric and imperial bolts?
A: Yes, but ensure all units are consistent (convert imperial measurements to metric first if needed).