ROLLERS
Tribotech develops a polymer roller that lasts longer than steel Max Otis, Director of roller manufacturer Tribotech, tells ABHR how and why the company developed a plastic roller that can outlast steel. WHEN MAX OTIS BEGAN researching the Australian mining industry in 2014, he was somewhat disappointed. According to him, many rollers were still being made and used the old-fashioned way, and innovation wasn’t up to standard at the time. This was one of the driving forces behind the creation of Tribotech. The company is named after tribology, the science of interacting surfaces in relative motion, and focuses on developing innovative conveyor roller designs. Otis says one of the main innovations the industry had welcomed was moving from steel to plastic rollers.
“This has been under way for the past 40 years or so, but the rollers haven’t changed much since then,” he says. “The type of plastic used is often either polyvinyl chloride (PVC) or highdensity polyethylene (HDPE), which are quite economical materials. They’ve been used heavily in the plumbing industry for the same reason. “We wanted to bring the engineering to a higher standard and use materials that were more exotic to find a better fit for the heavy-duty mining industry.” Tribotech began trialling several different materials to build the rollers. They were looking for one that provided optimal wear resistance, in addition to catering for maximum loads and ultimately a longer lifespan. In doing this, the company’s engineers investigated alternative industries, such as the aeronautics sector, to find a material that would make a viable roller. After heavy research and development, Tribotech chose a particular polymer – and so Weartech was born. Otis says Tribotech originally tested the Weartech rollers to be suitable for the
iron ore industry, which experiences the most problems with rollers. He details the initial methodology that was undertaken to combat the main challenges present in this area. “Iron ore is extremely abrasive. It has a higher density than other materials and is typically carried at a higher volume. This means that the tonnes per hour carried on the conveyor is the highest in the industry, which often leads to a higher rate of roller failure,” he says. “Weartech offers all the benefits of plastic while also having the ability to outlast steel. The performance of the rollers that we’ve seen with this product has been unwavering.” One example of this can be seen in a Pilbara iron ore mine, who trialled Weartech after a bad experience with PVC rollers. Due to a high failure rate caused by extremely high wear and tension on the conveyor belt, the client had previously decided to replace the steel rollers with PVC ones to reduce the risk of belt damage. This came at a cost, as the PVC rollers had a significantly lower lifespan, at around six to eight weeks. Weartech offers all the benefits of plastic while also having the ability to outlast steel.
Tribotech manufactures the tubes in-house instead of having them externally manufactured, which reduces the long-term cost.
20 І Australian Bulk Handling Review: September/October 2021
