Home > Design Advice > The Choice of Process > Casting Tolerances > Linear Tolerances Across the Parting Line
|
Projected Area of Casting |
Pressure Die Cast |
|
|
|
Aluminium Alloy |
Zinc Alloy |
|
Up to 150 cm2 |
± 0.1mm |
± 0.075mm |
|
150 to 300 cm2 |
± 0.125mm |
± 0.1mm |
|
300 to 600 cm2 |
± 0.2mm |
± 0.15mm |
|
600 to 1200 cm2 |
± 0.3mm |
± 0.2mm |
|
Projected Area of Casting |
Gravity Die Cast |
Sand Cast |
|
|
Aluminium or Zinc |
Zinc Alloy |
|
Up to 60 cm2 |
± 0.25mm |
± 0.5mm |
|
60 to 300 cm2 |
± 0.375mm |
± 0.875mm |
|
300 to 600 cm2 |
± 0.5mm |
± 1.125mm |
|
600 to 1500 cm2 |
± 0.625mm |
± 1.5mm |
|
1500 to 3000 cm2 |
± 0.75mm |
± 2.25mm |
These tolerances must be provided in addition to the linear dimensional tolerances where a dimension is affected by the parting line. They apply to dimensions both parallel and perpendicular to the parting line.
The values shown represent production practice at the most economical level. Greater accuracy involving extra work or care in production should be specified only when and where necessary.
Notes for Designers of Non-Ferrous Castings
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