Bucyrus International says its Flex Pal series conveyor rolls offer a convenient upgrade path to high-quality idlers for underground applications. Featuring a unique retrofit design, Flex Pal rolls are claimed to be easily integrated into existing structure and are available in CEMA C and D ratings with 4-, 5- and 6-in. diameters for belt widths ranging from 30–60 in.
According to the company, Flex Pal rolls can be used with carrying assemblies for roof-hung, floor-mounted and wire-rope structure; all three types use Bucyrus handle and pin rail connections. Installation is quick, with no special tools required. Idlers comprise two steel rolls and one center roll made from Exalon—a proprietary high-molecular-weight polyethylene—because this roll is subject to the greatest wear and requires more frequent replacement. Exalon, according to Bucyrus, not only offers two to three times the life of a steel roll, but is also lightweight, sound dampening and resistant to material buildup. All Flex Pal rolls are greased for life with Positive Automatic Lubrication. A spring-loaded compensator disk allows grease to expand when hot and compresses it as the bearing cools. This ensures a constant pressure on lubricant in the bearing regardless of changes in volume. Each roll is marked with a unique serial number to allow tracking throughout its service life.