Plain slewing bearings use self-lubricating polymer

Paul Boughton

Igus has developed a range of innovative slewing bearings that use two self-lubricating, low-friction polymer sliding elements in place of conventional ball bearings. As a cost-effective, low-noise alternative, the Igus PRT polymer slew ring bearing modules are also highly wear-resistant, easy to install and completely maintenance-free, while at the same time being robust and offering a very high load capacity.

All housing parts are made of aluminium and use stainless steel screws. The polymer sliding pads in the PRT slewing rings are made of the high-performance iglidur J material, which contains a solid lubricant, so it does not require additional lubrication. This material also offers a low coefficient of friction, as well as being resistant to chemical aggressors, featuring low moisture absorption and good vibration dampening properties. In addition, the counter-running surfaces of the iglidur J sliding pads are hard-anodised.

As explained by Matthew Aldridge of Igus UK, the iglidur PRT slewing bearing modules are "rugged, corrosion-resistant units that are particularly well-suited in applications where high loads, extreme overturning torques, alternating ambient media or low to medium surface speeds are prevalent."

Maintenance- and lubrication-free, the iglidur PRT modules are suitable for OEMs looking for a ready-to-install slewing ring, such as in semiconductor and cleanroom applications, assembly lines, wind turbines, production facilities and robots. The iglidur PRT slewing ring bearing system is available in a wide range of sizes, with outside diameters of 20, 30, 60, 100 200 and 300mm.

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