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Load-bearing idler sets, also known as troughing idlers, are the primary, structural backbone of any belt conveyor system. Positioned along the conveyor's carrying side, they are responsible for supporting the total weight of both the conveyor belt and the bulk material load, shaping the belt into a trough for greater capacity and stable transport. Their performance is directly linked to the system's efficiency, energy consumption, and operational longevity.
Core Function & Design:
Unlike single return idlers, load-bearing idlers are configured in sets—most commonly 3-roll or 5-roll designs—to create a trough shape. The center roll provides base support, while the inclined wing rolls (at angles of 20°, 35°, or 45°) contain the material and increase cross-sectional load capacity. This design is critical for preventing spillage and maximizing throughput in industries like mining, aggregate, and agriculture.