1. What is the Torque Formula?

The torque formula T = K × F × D calculates the required torque for bolt tightening, where T is torque (Nm), K is the torque coefficient (dimensionless), F is the force (N), and D is the diameter (m).

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 formula calculates the rotational force needed to properly tighten a bolt, accounting for friction and other factors through the torque coefficient.

3. Importance of Torque Calculation

Details: Proper torque calculation is crucial for ensuring bolt integrity, preventing under-tightening (which can lead to loosening) and over-tightening (which can damage threads or cause bolt failure).

4. Using the Calculator

Tips: Enter the torque coefficient (typically 0.2 for dry steel, 0.15 for lubricated steel), the required 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 steel bolts, K is typically around 0.2. For lubricated bolts, K is typically around 0.15. Always consult manufacturer specifications for precise values.

Q2: Why is proper torque important?
A: Proper torque ensures joint integrity, prevents bolt fatigue failure, and maintains proper clamping force in the assembly.

Q3: How do I determine the correct force (F) value?
A: The force value depends on the required clamping force for your specific application, which is determined by the joint design and materials.

Q4: Does thread pitch affect torque calculations?
A: Thread pitch is accounted for in the torque coefficient (K) value, which incorporates friction factors including thread friction.

Q5: Should I use this calculation for critical applications?
A: For critical applications, always consult engineering specifications and consider factors like material properties, temperature, and vibration that may affect torque requirements.