May 13, 2019

Linear Tolerance for Investment Casting

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

Our Services

  1. Sand Casting

    Casting Quality focus on Metal Parts industry, we provide professional service in Metal Casting field.

    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.

  2. Investment Casting

    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

  3. Shell Casting

    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.

  4. CNC Machining

    CNC Milling, CNC turning with 5 xix CNC center, we provide precision machining for all castings based on customers design drawings.

  5. CAD Design

    Mechanical Design service based on customers requirement, our software is Solidworks and AutoCAD.

  6. Tools/Mold Design

    Mould design and production will be served for metal casting ad plastic injection industry. Based on our more than 10 years experience, we supply professional molds for our customers in Europe and North American.

Linear Tolerance for Investment Casting in ICI

Casting dimension (Inch)Casting dimension(mm)General Toerlance (+/-)Special Tolerance (+/-)
0.5 in12.50 mm±0.007  in±0.18 mm±0.003  in±0.08 mm
0.5 in1 in12.50 mm25.40 mm±0.010  in±0.03 mm±0.005  in±0.13 mm
1 in2 in25.40 mm50.80 mm±0.013  in±0.33 mm±0.008  in±0.20 mm
2 in3 in50.80 mm76.20 mm±0.016  in±0.41 mm±0.010  in±0.25 mm
3 in4 in76.20 mm101.60 mm±0.019  in±0.48 mm±0.012  in±0.30 mm
4 in5 in101.60 mm127.00 mm±0.022  in±0.56 mm±0.014  in±0.36 mm
5 in6 in127.00 mm152.40 mm±0.025  in±0.64 mm±0.015  in±0.38 mm
6 in7 in152.40 mm177.80 mm±0.028  in±0.71 mm±0.016  in±0.41 mm
7 in8 in177.80 mm203.20 mm±0.031  in±0.86 mm±0.017  in±0.43 mm
8 in9 in203.20 mm228.60 mm±0.034  in±0.94 mm±0.018  in±0.46 mm
9 in10 in228.60 mm254.00 mm±0.037  in±1.02 mm±0.019  in±0.48 mm



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