Core
The inner portion of a mould, partially or wholly surrounded with metal. It may be composed of greensand, dry-sand, loam, or iron; the latter usually consisting of a tapered chill with some covering of carbon, as tar, etc., to protect it from the action of the molten metal. The Anti-chill Core Compound Company, Peoria, Ill., explain their core as follows: "Instead of the present process of using a sand core, we use a metal core made of cold-rolled steel shafting of the same size as the shaft on which the casting is intended to be run or used, turning out the castings ready for use, thereby saving from 50 to 75 per cent on the dollar in machine-finishing labor, such as boring, drilling, key-seating, feathering, etc., required when the sand core is used. This metal core before using, is coated by dipping into our compound, which prevents the molten metal from adhering to the core, and also prevents all chilling, blowing, straining, cracking, etc., of the iron or casting."