Optimized for productivity and designed to withstand the adverse conditions of longwall cutting applications, the R100 is the first-ever Joy block assembly developed to be a dedicated rotating sleeve block assembly. This assembly features a larger diameter block body that helps increase strength and durability. The rotating sleeve allows the cutting system to have dual-bit rotation, which enables both the bit and the sleeve to rotate independently, keeping the bit sharp and durable. The rotating sleeve design also eliminates the use of cumbersome installation and extraction tools, which can help reduce maintenance and downtime in the field. The larger sleeve diameter that overlaps the block body helps protect it from impact and abrasion.
Maintain longevity in the field
The rotating sleeve allows the cutting system to have dual-bit rotation, which enables both the bit and the sleeve to rotate independently, keeping the bits sharp for long durations, even in rugged environments.
Eliminate installation and extraction tools
Designed to increase efficiency, the rotating sleeve’s clearance makes it easier and quicker to change out when compared to a press fit sleeve. The rotating sleeve also helps reduce maintenance and downtime by eliminating the need for cumbersome installation and extraction tools.
More body means more durability
Help increase strength and durability in the field with a block assembly that features a larger diameter block body. A larger body equates to a larger contact area for the sleeve to mate up against. More contact area helps lower component stresses, while the longer, cylindrical body helps mitigate the occurrence of “hour-glass”-type bore wear.
Be better prepared before equipment failures happen with a visual wear indicator line on the sleeve’s outer diameter shoulder. The line shows the progression of sleeve life and indicates to the operator when it’s time to change out for a new sleeve.
Mitigate the chance of cracks
With a rounded bottom that allows the block to lean without a pedestal, you get a continuous weld bead around the base of the block. Continuous welds help moderate the chance of cracks that may occur at the weld root (commonly observed at welded corners).