The typical tolerance for investment casting (Lost Wax Casting) is defined in ISO 8062 generally, but ICI also required a coordinate tolerance in ICI 1997.

ICI 1997 provide a single set tolerance between 0.5 inch to 10 inch. It’s similar to ISO 286-2 Class JS15

Generally, the tolerance will be affected by three factors:

Wax shrinkage factors.
tooling Design tolerance.
Process variation, include shell and material.

For ISO standard tolerance, visit page

Specifications for Investment Casting Tolerances

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Sand Casting
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Sand Casting is a popular metal form method, are suitable for all materiel, such as grey iron, ductile iron, malleable iron, carbon steel, stainless steel, aluminum and bronze.
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also named as precision lost wax casting, mainly suitalbe for carbon steel and stainless steel parts. We also provide grey iron and ductile iron and aluminum and bronze parts by investment casting. It can achieve the best appearance with good tolerance
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Shell casting method is a good option to replace investment casting and sand casting. the quality is better than sand casting parts, suitable for bulk production.
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Linear Tolerance for Investment Casting in ICI
Casting dimension (Inch)		Casting dimension(mm)		General Toerlance (+/-)		Special Tolerance (+/-)
>	≤	>	≤	Inch	mm	Inch	mm
–	0.5 in	–	12.50 mm	±0.007 in	±0.18 mm	±0.003 in	±0.08 mm
0.5 in	1 in	12.50 mm	25.40 mm	±0.010 in	±0.03 mm	±0.005 in	±0.13 mm
1 in	2 in	25.40 mm	50.80 mm	±0.013 in	±0.33 mm	±0.008 in	±0.20 mm
2 in	3 in	50.80 mm	76.20 mm	±0.016 in	±0.41 mm	±0.010 in	±0.25 mm
3 in	4 in	76.20 mm	101.60 mm	±0.019 in	±0.48 mm	±0.012 in	±0.30 mm
4 in	5 in	101.60 mm	127.00 mm	±0.022 in	±0.56 mm	±0.014 in	±0.36 mm
5 in	6 in	127.00 mm	152.40 mm	±0.025 in	±0.64 mm	±0.015 in	±0.38 mm
6 in	7 in	152.40 mm	177.80 mm	±0.028 in	±0.71 mm	±0.016 in	±0.41 mm
7 in	8 in	177.80 mm	203.20 mm	±0.031 in	±0.86 mm	±0.017 in	±0.43 mm
8 in	9 in	203.20 mm	228.60 mm	±0.034 in	±0.94 mm	±0.018 in	±0.46 mm
9 in	10 in	228.60 mm	254.00 mm	±0.037 in	±1.02 mm	±0.019 in	±0.48 mm