1. What is Screw Torque Calculation?

Screw torque calculation determines the rotational force required to properly tighten a fastener. The formula T = K × F × D calculates the torque needed based on the torque coefficient, applied force, and fastener diameter.

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 torque coefficient accounts for friction and other factors that affect the relationship between applied force and resulting torque.

3. Importance of Torque Calculation

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

4. Using the Calculator

Tips: Enter the torque coefficient (typically 0.15-0.25 for standard fasteners), 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 standard unlubricated fasteners, K is typically between 0.15-0.25. Lubricated fasteners may have values as low as 0.10.

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

Q3: How does lubrication affect torque?
A: Lubrication reduces friction, which lowers the torque coefficient and requires less torque to achieve the same clamping force.

Q4: Should different materials use different coefficients?
A: Yes, different material combinations have different friction characteristics and require appropriate torque coefficients.

Q5: Can this formula be used for all fastener types?
A: While the basic formula applies to most fasteners, specialized fasteners may require modified calculations or specific torque specifications.