Three angle configurations, labelled a, b and c in the diagram, have separate normal and premium tolerance values.
Angle tolerance
| Tolerance class | Angle a | Angle b | Angle c |
|---|---|---|---|
| Normal | ±1° | ±2° | ±2° |
| Premium | ±0.5° | ±1° | ±1° |
Casting transitions and internal corners
Avoid abrupt changes in the casting structure and sharp corners. Use internal fillets where possible, with a radius no less than R0.3, following the notation.
Design notes
- Angle labels refer to the illustration; use the drawing to identify the applicable geometry.