How are roll designs determined and why can I use a smaller roll diameter?
Rolls are analyzed based on their application, which includes face width, speed and loading (either by web tension or nip load). An analysis will compare such things as anticipated stress and deflection levels to acceptable values and critical speeds to operating speeds. If any variable is not at an acceptable level, the roll construction needs to change. Diameter increases are often the most effective way to avoid undesirable stresses or deflection when compared with working with high strength materials which may be much more expensive.
