Raw material analysis for all incoming materials in Store dept. Mould hardness and dimension test practice. Before charging raw material is weighed for each charge in cupola furnace operation.
Flatness | Liner Tolerance | Length (mm) | Tolerance | Diameter (mm) | Length (mm) | Tolerance | Tolerance (mm) |
---|---|---|---|---|---|
Up to 25.00 | ± 0.05 | above 25.0 | 25.0 to 50.0 | ± 0.05 | ± 0.05 |
25.0 to 50.0 | ± 0.07 | 25.0 to 50.0 | 25.0 to 50.0 | ± 0.07 | ± 0.07 |
50.0 to 75.0 | ± 0.10 | 50.0 to 75.0 | 50.0 to 75.0 | ± 0.10 | 0.10 |
100.0 to 125.0 | ± 0.150 | 100.0 to 125.0 | -- | ± 0.15 | -- |
Normal angles tolerance is ± 1/2 degree but may very depending on the location in the casting.
Corner and the fillet radii should be minimum 0.5 mm each, but are dependent on adjacent casting features. Larger radii may be necessary to ensure against shrinkage in thick function.