1. What is the Bolt Circle Calculator?

The Bolt Circle Calculator determines the angle between equally spaced holes on a circular bolt pattern. This is essential for machining, drilling, and layout work in metalworking and woodworking.

2. How Does the Calculator Work?

The calculator uses the simple equation:

Where:

• 360° — Full circle in degrees
• Number of Holes — The count of equally spaced holes in the bolt circle

Explanation: The equation divides the full 360-degree circle by the number of holes to determine the angle between each hole.

3. Importance of Bolt Circle Calculation

Details: Accurate bolt circle calculations are crucial for proper hole spacing in applications like wheel hubs, flanges, gear patterns, and any circular mounting arrangement.

4. Using the Calculator

Tips: Simply enter the number of holes in your bolt circle pattern. The calculator will instantly show the angle between each hole.

5. Frequently Asked Questions (FAQ)

Q1: What's the minimum number of holes this works for?
A: The calculator works for any positive integer, but practical applications typically use 3 or more holes.

Q2: How precise is this calculation?
A: The calculation is mathematically exact. Precision depends on your measuring and machining capabilities.

Q3: Can this be used for non-circular patterns?
A: No, this calculator is specifically for equally spaced holes on a perfect circle.

Q4: What about hole diameter or circle diameter?
A: This calculator only determines angular spacing. For exact hole positions, you'd need the bolt circle diameter.

Q5: How does this relate to pitch circle diameter?
A: The pitch circle diameter is the diameter of the bolt circle, while this calculator determines the angular spacing.