1. What is Bolt Torque Clamping Force?

Bolt torque clamping force refers to the compressive force generated when a bolt is tightened with a specific torque. This force is crucial for maintaining joint integrity and preventing loosening in mechanical assemblies.

2. How Does the Calculator Work?

The calculator uses the clamping force formula:

Where:

• \( T \) — Applied torque (N·m)
• \( K \) — Torque coefficient (dimensionless)
• \( D \) — Bolt diameter (m)

Explanation: The formula calculates the axial clamping force generated by a bolt based on the applied torque, torque coefficient, and bolt diameter.

3. Importance of Clamping Force Calculation

Details: Accurate clamping force calculation is essential for proper bolt tensioning, joint reliability, and preventing bolt failure or loosening in mechanical systems.

4. Using the Calculator

Tips: Enter torque in N·m, torque coefficient (typically 0.15-0.25 for lubricated bolts), and bolt diameter in meters. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical torque coefficient value?
A: For lubricated bolts, K is typically 0.15-0.25. For dry or plated bolts, it can range from 0.20-0.35.

Q2: Why is clamping force important?
A: Proper clamping force ensures joint integrity, prevents leakage, and maintains structural stability in bolted connections.

Q3: How does lubrication affect torque coefficient?
A: Lubrication reduces friction, lowering the torque coefficient and allowing more clamping force for the same applied torque.

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

Q5: Is this formula accurate for all bolt types?
A: While generally applicable, specific bolt designs and materials may require specialized calculations or testing.