1. What is the Torque Equation?

The torque equation T = K × F × D calculates the torque required to properly tighten a bolt, where T is the torque, K is the torque coefficient, F is the force, and D is the diameter.

2. How Does the Calculator Work?

The calculator uses the torque equation:

Where:

• \( T \) — Torque (lb-ft)
• \( K \) — Torque coefficient (dimensionless)
• \( F \) — Force (lb)
• \( D \) — Diameter (ft)

Explanation: The equation calculates the rotational force needed to achieve proper bolt tension, accounting for friction and other factors through the K coefficient.

3. Importance of Torque Calculation

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

4. Using the Calculator

Tips: Enter the torque coefficient (typically 0.15-0.25 for dry threads), force in pounds, and diameter in feet. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

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

Q2: Why is proper torque important?
A: Proper torque ensures joint integrity, prevents leaks, and maintains structural stability while avoiding damage to fasteners and components.

Q3: Should I use consistent units?
A: Yes, it's critical to use consistent units (lb for force, ft for diameter) to get accurate torque results in lb-ft.

Q4: What affects the K coefficient?
A: Surface finish, lubrication, thread condition, and material combinations all affect the K value in torque calculations.

Q5: When should I consult torque specifications?
A: Always consult manufacturer specifications for critical applications, as they may provide specific K values or torque requirements.