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Igus has developed a range of slewing bearings that use two self-lubricating, low-friction polymer sliding elements in place of conventional ball bearings.
The PRT polymer slew ring bearings are said to be a cost-effective and low-noise alternative that are also wear resistant, easy to install, and maintenance free.
Igus added that the range is robust and has a 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 Iglidur J material, which contains a solid lubricant - meaning it does not require additional lubrication.
This material is also said to offer a low co-efficient 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.
The PRT slewing bearing modules are said to be 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 said to be ideal for OEMs looking for a ready-to-install solution, such as in semiconductor and clean-room applications, assembly lines, wind turbines, production facilities and robots.
The Iglidur PRT slewing ring bearing system is available in a range of sizes, with outside diameters of 20, 30, 60, 100 200 and 300mm.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7220DT KOYO | 100 | 180 | 68 |
| 7020CDT KOYO | 100 | 150 | 48 |