1. What is Screw Torque Calculation?

Screw torque calculation determines the rotational force required to properly tighten a screw or bolt. The torque value ensures proper clamping force without damaging the fastener or the materials being joined.

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 the torque coefficient which 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 overtightening that can strip threads, and maintaining safety in mechanical assemblies.

4. Using the Calculator

Tips: Enter the torque coefficient (typically 0.2 for dry steel, 0.15 for lubricated), the applied force in Newtons, and the 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. For lubricated fasteners, it's around 0.15. Specific values depend on materials and surface conditions.

Q2: Why is proper torque important?
A: Proper torque ensures adequate clamping force, prevents loosening from vibration, avoids damage to threads, and maintains joint integrity.

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: What units should be used?
A: Use consistent SI units: Newtons for force, meters for diameter, resulting in Newton-meters (Nm) for torque.

Q5: When should torque be recalculated?
A: Recalculate when changing materials, lubrication conditions, or when working with critical applications where precise torque is essential for safety.