Home > Design Advice > The Choice of Process > Casting Tolerances > Linear Tolerances Affected by Movements
These tolerances must be provided in addition to the linear dimensional tolerances where a core or moving die part affects a dimension.
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Projected Area of Casting |
Pressure Die Cast |
|||
|
|
Aluminium Alloy |
Zinc Alloy |
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Up to 60 cm2 |
± 0.125mm |
± 0.1mm |
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60 to 120 cm2 |
± 0.2mm |
± 0.15mm |
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|
120 to 300 cm2 |
± 0.3mm |
± 0.2mm |
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|
300 to 600 cm2 |
± 0.375mm |
± 0.3mm |
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Projected Area of Casting |
Gravity Die Cast |
Sand Casting |
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|
|
Aluminium or Zinc Alloy with Metal Core |
Aluminium or Zinc Alloy with Sand Core |
Aluminium Zinc or Copper Alloys |
|
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Up to 60 cm2 |
± 0.25mm |
± 0.375mm |
± 0.5mm |
|
|
60 to 300 cm2 |
± 0.375mm |
± 0.625mm |
± 0.875mm |
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|
300 to 600 cm2 |
± 0.375mm |
± 0.75mm |
± 1.125mm |
|
|
600 to 1500 cm2 |
± 0.55mm |
± 1.0mm |
± 1.5mm |
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|
1500 to 3000 cm2 |
± 0.8mm |
± 1.5mm |
± 2.25mm |
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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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