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Numbered from the starting angle in the positive rotation direction.
Fabrication / Hole patterns
Bolt Circle & PCD Calculator
Generate evenly spaced X/Y hole coordinates around a pitch circle diameter.
Pattern
Origin is the circle centre. 0° points right along +X; positive angles rotate counter-clockwise toward +Y.
Hole coordinates
| Hole | Angle | X (mm) | Y (mm) |
|---|---|---|---|
| 1 | 0° | 50 | 0 |
| 2 | 90° | 0 | 50 |
| 3 | 180° | -50 | 0 |
| 4 | 270° | 0 | -50 |
Pitch circle result
- Radius
- 50 mm
- Angular spacing
- 90°
- Adjacent chord
- 70.7107 mm