1. What is Bolt Torque?

Torque is a measure of the twisting force required to rotate a bolt or nut. Proper torque is critical for bolt tension, joint integrity, and preventing loosening or breakage.

2. How Does the Calculator Work?

The calculator uses the fundamental torque equation:

Where:

• \( \tau \) — Torque (Newton-meters, Nm)
• \( F \) — Force applied perpendicular to the lever arm (Newtons, N)
• \( r \) — Distance from the axis of rotation to the point of force application (meters, m)

Explanation: The torque increases with either greater force or longer lever arm distance.

3. Importance of Torque Calculation

Details: Proper torque ensures bolted joints maintain sufficient clamping force without exceeding the bolt's yield strength. Under-torquing can lead to joint failure, while over-torquing can damage threads or stretch bolts.

4. Using the Calculator

Tips: Enter force in Newtons and radius in meters. For practical applications, consider friction, thread pitch, and material properties which may require additional calculations.

5. Frequently Asked Questions (FAQ)

Q1: How does torque relate to bolt tightness?
A: Torque is proportional to bolt tension, but friction consumes about 90% of applied torque. Only about 10% actually creates clamping force.

Q2: What are typical torque values for bolts?
A: Torque values vary by bolt size, material, and application. Always consult manufacturer specifications for critical applications.

Q3: Why do torque wrenches exist?
A: Torque wrenches allow precise application of specific torque values to ensure proper bolt tension and joint integrity.

Q4: Does lubrication affect torque?
A: Yes, lubricated bolts require less torque to achieve the same clamping force. Torque specifications assume clean, dry threads unless noted.

Q5: Can I use this for angular torque calculations?
A: This calculates static torque. For angular torque (e.g., rotating shafts), additional factors like angular velocity must be considered.