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Linear Tolerances for Dimensions Affected by Loose Cores or Moving Die Parts

These tolerances must be provided in addition to the linear dimensional tolerances where a core or moving die part affects a dimension.

Below - View in Direction of Arrow A

Projected Area of Casting	Pressure Die Cast
	Aluminium Alloy		Zinc Alloy
Up to 60 cm2	± 0.125mm		± 0.1mm
60 to 120 cm2	± 0.2mm		± 0.15mm
120 to 300 cm2	± 0.3mm		± 0.2mm
300 to 600 cm2	± 0.375mm		± 0.3mm
Projected Area of Casting	Gravity Die Cast			Sand Casting
	Aluminium or Zinc Alloy with Metal Core	Aluminium or Zinc Alloy with Sand Core		Aluminium Zinc or Copper Alloys
Up to 60 cm2	± 0.25mm	± 0.375mm		± 0.5mm
60 to 300 cm2	± 0.375mm	± 0.625mm		± 0.875mm
300 to 600 cm2	± 0.375mm	± 0.75mm		± 1.125mm
600 to 1500 cm2	± 0.55mm	± 1.0mm		± 1.5mm
1500 to 3000 cm2	± 0.8mm	± 1.5mm		± 2.25mm

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.