Sandvik has launched its new generation of all-composite rollers for industrial conveyors.
These Sandvik HR185 conveyor composite rollers feature a composite tube and molded composite end caps which hold the bearings and seals.
Unlike other plastic rollers that rely on the physical properties of a single primary shell material to deliver both strength and abrasion resistance, the shells of Sandvik HR185 rollers are formed by advanced processes to deliver a two-part composite tube that can handle all the running loads of a steel roller at a significantly reduced weight.
The rollers are designed to be up to 70 per cent lighter than the shell used on traditional steel rollers and up to 40 per cent lighter than other plastic shell materials, according to the manufacturer.
“This significantly lower weight enables safer, easier handling and helps reduce the risk of injuries that can occur while installing new rollers or replacing failed rollers during maintenance. In addition, should a roller reach the end of its service life and stop rotating, there is no steel end cap to damage the belt, reducing the risk of belt damage,” according to the company.
The new rollers are also ideal for noise-sensitive applications, such as operations near populated areas or export terminals.
They reportedly generate around half of the noise of steel rollers, while the natural dampening effect of the composite means their use cuts noise levels.
“In addition to improving safety and increasing productivity, Sandvik HR185 rollers can reduce total cost of ownership by up to 20 per cebt,” Chris Mitchell, global product line manager, Sandvik Mining, said
“They require less time and manpower to install and maintain, and their reduced power demand due to a lower rotating inertia means savings in electricity costs. A large, non-rotating end cap covers up to 90 per cent of the roller face and helps to limit damage to seals and bearings from dirt, rocks and other material buildup at the roller face, further extending the roller life and reducing costs.”
The company states the rollers are suitable for high speeds and large tonnages, and available in diameters, ranging from 152 millimetres to 178 millimetres, and bearing sizes from 6306 up to 6310.