1. What is Clamp Load Vs Torque Calculation?

The clamp load vs torque calculation determines the axial force (clamp load) generated when torque is applied to a fastener. This relationship is critical in bolted joint design to ensure proper preload and joint integrity.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( F \) — Clamp load (N)
• \( T \) — Applied torque (N m)
• \( K \) — Torque coefficient (dimensionless)
• \( D \) — Nominal bolt diameter (m)

Explanation: The torque coefficient K accounts for friction and other factors that affect the relationship between applied torque and resulting clamp load.

3. Importance of Clamp Load Calculation

Details: Proper clamp load calculation is essential for ensuring joint integrity, preventing loosening, avoiding bolt failure, and maintaining proper sealing in pressurized systems.

4. Using the Calculator

Tips: Enter torque in Newton-meters, K factor (typically 0.15-0.25 for unlubricated steel fasteners), and diameter in meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical K factor value?
A: For unlubricated steel fasteners, K is typically 0.15-0.25. Lubricated fasteners may have K values as low as 0.10.

Q2: Why is clamp load important in bolted joints?
A: Proper clamp load ensures joint integrity, prevents loosening from vibration, maintains sealing, and prevents bolt fatigue failure.

Q3: How accurate is this calculation?
A: Accuracy depends on the precision of the K factor, which varies with lubrication, surface finish, and thread condition.

Q4: What units should I use?
A: Use consistent SI units: torque in N·m, diameter in meters, resulting in clamp load in Newtons.

Q5: Can this be used for all fastener types?
A: This formula applies generally to threaded fasteners, but specific applications may require adjustments for special conditions.