Want to know more about metal casting?

There’s a good piece in the latest Gear Solutions Magazine about metal casting and different types of metals, which is something that’s not solely related to gear manufacturing, but it’s something that underlies just about the entire industry. It’s worth a read.

Sand Casting: This is the oldest known method of producing an intricate casting. Molten metal is poured into a non-permanent sand mold that has been prepared with a pattern. Green sand molds use synthetic sand or sand in its natural or green state, i.e. damp sand still containing moisture. The sand must be cohesive and refractory (withstand heat without fusing), permeable (porous enough to let gases escape), and strong enough to support the weight and cores. Such a cast gear, even with extra care, can only achieve a quality level of A14.