1. What is the Torque Formula?

The torque formula T = K × F × D calculates the required torque for tightening bolts, where T is the torque in Newton-meters (Nm), K is a dimensionless constant, F is the force in Newtons (N), and D is the diameter in meters (m).

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (Nm)
• \( K \) — Dimensionless constant (typically 0.2 for dry, 0.15 for lubricated)
• \( F \) — Force applied (N)
• \( D \) — Bolt diameter (m)

Explanation: The formula accounts for the relationship between force, diameter, and the friction coefficient to determine the required tightening torque.

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for proper bolt tightening, preventing under-tightening (which can cause loosening) and over-tightening (which can damage threads or cause bolt failure).

4. Using the Calculator

Tips: Enter the dimensionless constant K, the force in Newtons, and the diameter in meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical value for K?
A: K typically ranges from 0.15 to 0.25, with 0.2 commonly used for dry threads and 0.15 for lubricated threads.

Q2: Why is torque important in bolted connections?
A: Proper torque ensures adequate clamping force, prevents joint failure, and maintains the integrity of mechanical connections.

Q3: How does lubrication affect torque requirements?
A: Lubrication reduces friction, requiring less torque to achieve the same clamping force compared to dry threads.

Q4: What units should I use for accurate calculations?
A: Use consistent SI units: force in Newtons (N), diameter in meters (m), and torque in Newton-meters (Nm).

Q5: Can this formula be used for all bolt types?
A: While the basic formula applies to most bolts, specific applications may require adjustments for thread pitch, material, and surface conditions.