Lost wax casting tolerances

Hello,

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?

Cheers,
David

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.

Regards,
Ivan
i.Materialise