1. What is the Torque Calculation Formula?

The torque calculation formula T = K × F × D is used to determine the torque required to properly tighten a bolt. This equation accounts for the friction coefficient, applied force, and bolt diameter to ensure proper fastening without damaging the bolt or materials.

2. How Does the Calculator Work?

The calculator uses the torque equation:

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 that affect the relationship between applied force and resulting torque.

3. Importance of Torque Calculation

Details: Proper torque calculation is essential for ensuring bolt integrity, preventing loosening under vibration, avoiding overtightening that can damage threads, and maintaining structural integrity in mechanical assemblies.

4. Using the Calculator

Tips: Enter the torque coefficient (typically 0.15-0.25 for dry threads, 0.10-0.15 for lubricated threads), the desired clamping force in newtons, and the bolt diameter in meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical torque coefficient value?
A: For dry, unlubricated threads, K is typically 0.15-0.25. For lubricated threads, K is typically 0.10-0.15. The exact value depends on surface finish and materials.

Q2: Why is proper torque important?
A: Proper torque ensures adequate clamping force without exceeding the bolt's yield strength, preventing joint failure or bolt breakage.

Q3: How do I determine the required clamping force?
A: Clamping force depends on the application - consult engineering specifications or standards for your particular joint design and loading conditions.

Q4: Does thread pitch affect torque calculation?
A: Thread pitch is accounted for in the torque coefficient (K) value, which varies with thread geometry and friction conditions.

Q5: Should I use the same torque for all bolts?
A: No, torque requirements vary based on bolt size, grade, material, lubrication, and application requirements. Always follow manufacturer specifications.