1. What is Torque Calculation?

Torque calculation for bolts is essential in mechanical engineering and construction to ensure proper fastening. The formula T = K × F × D calculates the torque required to achieve a specific clamp load in a bolted joint.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (Nm)
• \( K \) — Torque coefficient (dimensionless)
• \( F \) — Force (N)
• \( D \) — Diameter (m)

Explanation: The torque coefficient K accounts for friction and other factors in the bolted joint. Typical values range from 0.15 to 0.30 for standard applications.

3. Importance of Torque Calculation

Details: Proper torque calculation ensures bolted joints are neither under-tightened (risking joint failure) nor over-tightened (risking bolt failure or thread stripping).

4. Using the Calculator

Tips: Enter the torque coefficient (K), force (F) in Newtons, and diameter (D) in meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical torque coefficient value?
A: For standard lubricated bolts, K is typically between 0.15-0.20. For dry or non-lubricated bolts, K may be 0.20-0.30.

Q2: How does thread pitch affect torque calculation?
A: Thread pitch is accounted for in the torque coefficient K. Finer threads generally require less torque for the same clamp load.

Q3: Why is proper torque important?
A: Correct torque ensures joint integrity, prevents loosening under vibration, and avoids damage to threads or bolt failure.

Q4: How does lubrication affect torque?
A: Lubrication reduces friction, lowering the torque required to achieve a specific clamp load. Always use the K value appropriate for your lubrication condition.

Q5: Can this formula be used for all bolt types?
A: This formula is generally applicable for standard bolts, but specialized fasteners may require modified calculations or specific torque values from manufacturers.