1. What is the Clamp Load Formula?

The clamp load formula calculates the axial force (clamp load) generated from applied torque, using the torque coefficient and diameter. It's essential for bolt tightening and mechanical assembly applications.

2. How Does the Calculator Work?

The calculator uses the clamp load formula:

Where:

• \( F \) — Clamp load (N)
• \( T \) — Applied torque (Nm)
• \( K \) — Torque coefficient (dimensionless)
• \( D \) — Diameter (m)

Explanation: The formula converts torque into axial force, accounting for the mechanical advantage and friction characteristics through the torque coefficient.

3. Importance of Clamp Load Calculation

Details: Accurate clamp load calculation is crucial for proper bolt tensioning, preventing joint failure, ensuring structural integrity, and maintaining safety in mechanical assemblies.

4. Using the Calculator

Tips: Enter torque in Nm, coefficient (typically 0.15-0.25 for standard bolts), and diameter in meters. All values must be positive and non-zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical range for torque coefficient K?
A: For standard bolts, K typically ranges from 0.15 to 0.25, but can vary based on lubrication, surface finish, and thread condition.

Q2: Why is clamp load important in bolted joints?
A: Proper clamp load ensures joint integrity, prevents loosening, and maintains sealing pressure in gasketed joints.

Q3: How does diameter affect clamp load?
A: Larger diameters require more torque to achieve the same clamp load, as the formula shows an inverse relationship with diameter.

Q4: What factors influence the torque coefficient?
A: Surface finish, lubrication, thread pitch, material properties, and washers all affect the torque coefficient value.

Q5: When should this calculation be used with caution?
A: In critical applications or when precise tension is required, direct tension measurement methods should be used instead of torque-based calculations.