Bolt Circle Calculator
Calculate Bolt Circle Dimensions
About Bolt Circle Calculations
Bolt circle calculations are essential for precise hole drilling and bolt placement in mechanical assemblies.
Coordinate Formula:
X = R × cos(θ)
Y = R × sin(θ)
Where:
- R = Bolt circle radius
- θ = Angle from reference
- X, Y = Bolt coordinates
Common Applications:
• Flange connections
• Wheel mounting
• Gear assemblies
• Pump housings
• Motor mounts
Standard Patterns:
- 3-bolt: 120° spacing
- 4-bolt: 90° spacing
- 6-bolt: 60° spacing
- 8-bolt: 45° spacing
Precision Requirements:
• ±0.001" for critical applications
• ±0.005" for general use
• ±0.010" for rough work
• Use proper drilling techniques
Accurate bolt circle calculations ensure proper alignment and load distribution in mechanical connections.