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JIS Specifications
 
Investment Casting
  Tolerance of Copper
  Alloy Castings
 
Centrifugal Copper Alloy
  Casting Dimensions



 

Dewaxing Tolerance of Copper Alloy Castings

Precision Casting Dimensions Tolerance


Flatness

Castings can rely on straightening or integer methods to achieve precise dimension requirements. General tolerance is as below:


Roundness


Length


Angle Tolerance

* Internal R angle
Internal R angle the bigger the better to increase the mechanical properties of castings and better dissolved liquidity. But big external R angle will increase the production cost of mold. Therefore, unless absolutely necessary, one should not specify external R angle to exceed R1.5mm and keep internal R angle in R1.5mm max ± 0.45mm can achieve good casting result under general condition.


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