1. What is the Bolt Size Calculation?

The bolt size calculation determines the minimum required bolt diameter based on the applied load and allowable stress. This ensures the bolt can safely withstand the forces it will experience in service.

2. How Does the Calculator Work?

The calculator uses the bolt size formula:

Where:

• \( D \) — Bolt diameter (m)
• \( F \) — Applied load (N)
• \( \sigma \) — Allowable stress (Pa)

Explanation: The formula calculates the minimum bolt diameter required to safely carry the specified load without exceeding the material's allowable stress.

3. Importance of Bolt Size Calculation

Details: Proper bolt sizing is critical for structural integrity and safety. Undersized bolts may fail under load, while oversized bolts increase cost and weight unnecessarily.

4. Using the Calculator

Tips: Enter the applied load in newtons (N) and the allowable stress in pascals (Pa). Both values must be positive numbers. The result will be the minimum required bolt diameter in meters.

5. Frequently Asked Questions (FAQ)

Q1: What factors affect bolt selection besides diameter?
A: Material grade, thread type, length, corrosion resistance, and installation torque are all important considerations in bolt selection.

Q2: How do I determine the allowable stress for a bolt?
A: Allowable stress depends on the bolt material and safety factors. Typically, it's a percentage of the material's yield strength or ultimate tensile strength.

Q3: Does this formula account for shear loads?
A: This formula calculates for tensile loads. Different calculations are needed for bolts primarily loaded in shear.

Q4: Should I use a safety factor with this calculation?
A: Yes, always incorporate appropriate safety factors based on the application, loading conditions, and consequences of failure.

Q5: How do I convert the result to standard bolt sizes?
A: After calculating the minimum diameter, select the next available standard bolt size that meets or exceeds your calculated value.