1. What is Screw Torque Calculation?

Screw torque calculation determines the rotational force required to properly tighten a screw or bolt. It ensures proper fastening without damaging the components or the fastener itself.

2. How Does the Calculator Work?

The calculator uses the screw torque equation:

Where:

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

Explanation: The equation calculates the torque required based on the force applied and the diameter of the screw, adjusted by a coefficient that accounts for friction and other factors.

3. Importance of Torque Calculation

Details: Proper torque calculation is essential for ensuring mechanical integrity, preventing joint failure, avoiding thread stripping, and maintaining safety in mechanical assemblies.

4. Using the Calculator

Tips: Enter torque coefficient (typically 0.2 for dry steel), force in Newtons, and 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 fasteners, K is typically around 0.2. Lubricated fasteners may have values around 0.15-0.18.

Q2: Why is proper torque important?
A: Under-torquing can lead to loose connections and joint failure, while over-torquing can damage threads or break fasteners.

Q3: How does diameter affect torque?
A: Torque increases linearly with diameter - larger diameter fasteners require more torque to achieve the same clamping force.

Q4: Should torque values be adjusted for different materials?
A: Yes, different materials have different friction coefficients and strength properties that affect torque requirements.

Q5: How often should torque be checked?
A: Critical connections should be checked periodically as vibration and thermal cycling can cause fasteners to loosen over time.