When a part is formed from molten material, the part will shrink as the material cools and solidifies. As a result, a shrinkage allowance is usually added to the size of the part.
A markup to the cost of purchased material that may include overhead costs of storing the material, any labor costs in handling or transporting the material, as well as profit.
The temperature of the material at which a part can safely be ejected from the mold. Ejection of the part before it reaches this temperature may cause warping or other defects.
Components that are placed between a fastener and a part to create a more precise or secure fit. These include bushings, collars, grommets, rings, seals, sleeves, washers, etc.
Protective covers, or part of such a cover, that fully encloses other parts and may hold them in place. These include boxes, casings, containers, covers, housings, shells, etc.
The amount of spacing to be left between the parts when packed into a box, as well as the space adjacent to the side walls of the box. This space can be used to add filler.
The width of the cut when cutting a workpiece from a piece of bar stock. The cutoff width is used in determining how many workpieces a single piece of bar stock will yield.
The line along a part where the mold halves separate. In a simple mold, this line will be straight. However, more complex molds may have a stepped or curved parting line.
