A roll shop in an Indiana mill has coined these Bonnets. They have been using these parts for over 10 years and now have completely replaced all of their metal bonnets with polyurethane.
- Self-sealing polyurethane eliminates the need for a rubber gasket.
- The polyurethane is resilient and holds its shape in the event of an impact during loading/unloading of the roll package into the mill. The dented and bent steel bonnets are a thing of the past.
- Polyurethane is 70% lighter than steel. The mill has eliminated the use of a jib crane to bolt the polyurethane ones into place.
- Due to the non-stick aspect of polyurethane, there is significantly less effort required removing the excess grease from the I.D.