Dimensional Tolerance Standards
Eagle Aluminum Dimensional Tolerance Standards for Greensand Castings
The following are the normal dimensional tolerances that can be applied to as-cast parts using the greensand casting process. Any deviation from these guidelines will be considered on a case by case basis. Specific part geometry may require or allow an increase or decrease in tolerance from this standard. Subsequent operations (e.g. grinding, pressing, machining, etc.) may improve tolerances on specific dimensions. Tolerances based on experience and on the Aluminum Association’s Standards for Aluminum Sand Castings.
LINEAR DIMENSIONS |
TOLERANCES |
| 1st Inch | |
| Each Additional Inch | |
| 1-6″ | +/- 0.015″ |
| Each Inch Over 6″ | Additional 0.003″ |
*3D PRINTED MOLD CASTINGS WOULD FOLLOW AIRSET TOLERANCES.
Misc. Callouts
TOLERANCES |
|
| ACROSS PARTING LINE–ADD to ABOVE | 0.030” |
| MINIMUM WALL THICKNESS | .250” |
| DRAFT | 5° |
*GREENSAND CASTING ANGLES CAN RANGE FROM SHARP TO .060″ ON RADII/ FILLETS DEPENDING ON DESIGN