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Linear Dimensional Tolerances

	Pressure Die Casting		Gravity Die Casting	Sand Casting
Length of Dimension  A	Aluminium	Zinc	Aluminium or Zinc	Aluminium, Zinc or Copper
Basic Tolerance up to 25mm	± 0.075	± 0.05	± 0.4	-
Basic Tolerance up to 150mm	-	-	-	± 0.75
Additional Tolerance for each further 25mm	± 0.04	± 0.025	± 0.05	± 0.075

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.