There are many different types of Nylon but the most common are Cast Nylon (Type 6) and Extruded Nylon (Type 6,6). The largest applications for Nylon are gears, cams, bearings, valve seats and other bearing and wear applications that require wear resistance, quiet operation and low coefficients of friction. Since Nylon absorbs water, they are typically not preferred for wet applications however there are grades and design methods that can make them work for specific applications.
Nylon is one of the most widely used engineering thermoplastics. It offers an excellent combination of mechanical performance and cost. There are many nylon grades available today, the most common being nylon 6/6 and nylon 6. The properties of both nylon products are very similar; and typically, they can be used interchangeably. However, there are some advantages and limitations to each material both nylon 6/6 and nylon 6.