Lost wax casting tolerances


The tolerances on metal lost wax casting + polishing are not completely clear to me. For example I see that a high gloss finish would “shave” 0.1 to 0.15 mm from the model. But does that mean each side of the model or total? Say I design a flat pendant 1.5 mm thick, is the polishing going to decrease the thickness 0.1 to 0.15 mm total or 0.1 to 0.15 mm on each side?

Should I also factor anything for thermal shrinkage of the wax, the mold and/or the metal?


Hi David,

Talking about dimensions reduction 0.1-0.15mm would be taken off in general not from each side individually. As to shrinkage, this phenomenon is not noticed neither in wax nor mold or cast metal.