Bolt circle (PCD) hole coordinates
For bolt holes on flanges and discs, or face drilling with the C axis on a turn-mill center.
- Angle between holes
- 60.0000°
- Distance between adjacent holes
- 50.000 mm
| Hole | Angle / C axis (°) | X | Y |
|---|---|---|---|
| 1 | 0.000 | 50.000 | 0.000 |
| 2 | 60.000 | 25.000 | 43.301 |
| 3 | 120.000 | -25.000 | 43.301 |
| 4 | 180.000 | -50.000 | 0.000 |
| 5 | 240.000 | -25.000 | -43.301 |
| 6 | 300.000 | 25.000 | -43.301 |
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📘 Free download: CNC machine buyer's guide 2026 (PDF) →- Angles are measured from the +X axis. On a turn-mill center the C-axis angle equals the hole angle. Adjacent hole distance = PCD × sin(180° / number of holes).