Or have polyurethane cast around industrial size steel rollers for many heavy industrial material handling applications. For precision applications, parts are cast oversize then ground to precise dimensions. Basic Ergonomics Urethane resists oils, mud, water, and other environmental factors found in construction, agriculture, mining, and manufacturing. Better for Butter-Fingers Polyurethane can be cast rigid enough to replace plastics, metals, and ceramics, which tend to become brittle. The advantage with using polyurethane is that it bounces instead of breaking when dropped.
Some examples are instrument housings, medical products, and electrical connectors.