Coal Age

OCT-NOV 2017

Coal Age Magazine - For more than 100 years, Coal Age has been the magazine that readers can trust for guidance and insight on this important industry.

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Page 37 of 51

36 October/November 2017 conveyors continued ceramic tile that provides robust perfor- mance in dry, wet or muddy applications; superior bonding strength due to 3 mm of the neoprene compound vulcanized into the bottom-side of the lagging; and round- ed corners to allow for better adhesion be- tween the rubber and the tile. The HXF-40 and SDX-2200 idler roll- er lines from Komatsu Mining ( Joy) are super-duty systems that surpass CEMA F and E idler load standards, respectively. The HXF-40 series incorporates a 40-mm spherical roller bearing, and is specifical- ly designed for high-tonnage mining and industrial applications. Bearing protection features include: • A patented, engineered shaft that re- duces overall roll weight and increases performance; • Patented retaining sleeve creates a smooth contact surface for the rotat- ing lip seal; • Back seal that allows for a large grease reservoir; • Flinger to employ natural centrifugal forces generated by a rotating idler roll, redirecting potential contamin- ants away from the bearing cavity; • Triple labyrinth seal to retard lateral movement and provide a barrier to contaminants reaching the bearing; • Counter-bored shell with protected weld contributes to proper bearing alignment; and • Lip seal to provide added protection for the bearing. The SDX-2200 is a super-duty idler meeting the requirements for CEMA E applications up to 2,200-lb load rating. According to the company, its combina- tion labyrinth and contact seal has been proven in the field to be superior to car- tridge-type or conventional labyrinth seals used in other heavy-duty idlers. The SDX-2200 idlers offer up to a 2-in. engineered shaft for additional load ca- pacity, along with an adjusting nut that provides additional protection to the seal area and establishes a precise bearing adjustment; a positive hold down that includes drop-in rolls that are factory as- sembled and positively secured; an exter- nal labyrinth seal featuring a unique roll head and nut combination to produce an extremely long path, close tolerance laby- rinth seal; and interchangeable rolls (wing and center), either sealed or regreaseable, that are interchangeable. Metso's Energy Saving Idler (ESI) sys- tem, according to the company, can pro- vide reductions of up to 35% in power con- sumption of long distance belts, besides increasing the service life of the equip- ment. The ESI design replaces the conven- tional central roller with a pair of lighter idlers mounted on a pivoted rocker arm, decreasing the spacing on the belt and the pressure on the central roller, which nor- mally receives 70% of the total load. With this new configuration, the load applied on each roller, as well as the contact pres- sure with the belt, is reduced by 50%. In addition, the company said cus- tomers can gradually replace the central roller on existing belt systems with the Metso says its Energy Saving Idler system reduces the load typically carried by conventional roller systems by 50%, in addition to cutting belt power consumption by up to 35%. Martin Engineering has designed its new Safe to Service (STS) blade cleaners to improve worker safety and reduce maintenance downtime.

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