Originally Posted by
oldsewnsew
Is shrinkage a factor??
So far not so much. Withthe RTV molding there is not much at all.
With the sand casting I was taught to "wiggle" the original in the sand just a hair to allow for shrinkage. Not exactly scientific, but hey it works.... Most gearing made back then includes what today would be called a lot of slop.... so it should be close enough.
I have a small smelter that I am trying to get the time to get up and running. It will melt about 1 pound of bronze, so I "may" be able to cast things like handcrank parts and such.