Sand-Mold
Casting Tolerances
Sand-mold casting tolerances
may vary considerably depending upon the
type of metal used. A general comparison
of casting tolerances is given in the
following table.
|
Sand-Mold
Casting Tolerances
|
|
Metal
|
Tolerance
±in./ft*
|
| Aluminum Alloys |
1/32 |
| Cast Iron |
3/64 |
| Cu-Base Alloys |
3/32 |
| Cast Steels |
1/16 |
| Magnesium Alloys |
1/32 |
| Malleable Iron |
1/32 |
| *
Note on parting line influence: When
parting lines are considered, very
close tolerances are difficult to
obtain. A parting line absorbs fractions
of inches per inch. A foundry is doing
well to hold a parting line to 0.015
in. Additional measurement is added
to the casting tolerance. |
