Materials are limited to ductile materials because the threads are cold formed. .
Also, materials with good deformation characteristics are necessary for rolling; these materials include softer (more ductile) metals and exclude brittle materials, such as cast iron.
When a pattern is made in three parts, the ________ is known as a drag.
Materials used. Typically, materials used for pattern making are wood, metal or plastics. Wax and Plaster of Paris are also used,
Sugar pine is the most commonly used material for patterns, primarily because it is soft, light, and easy to work