the chart gives limiting length-to-diameter ratios for two illustrated casting geometries. Refer to the diagram for the L and ΦD dimensions.
Limiting dimensions for cast holes and slots
| Geometry | Diameter notation (ΦD) | Maximum L / D |
|---|---|---|
| Upper drawing | Φ2–Φ3 | 2 |
| Upper drawing | Φ4–Φ7 | 5 |
| Upper drawing | ≥Φ8 | 10 |
| Lower drawing | Φ2–Φ3 | 1 |
| Lower drawing | Φ4–Φ7 | 2.5 |
| Lower drawing | ≥Φ8 | 3.5 |
Design notes
- Each maximum reproduces an L / D ≤ value from the guide.
- the guide identifies the two configurations by drawings and does not provide written geometry names.
- The chart does not print a unit beside its diameter ranges. Confirm units and geometry with the component drawing.