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In some manufacturing settings space between pieces of equipment can be tight. This can cause problems especially when some machines need room to rotate from one location to another. Traditional rotary motion devices comprised of metal shafts and flange bearings often required time-consuming assembly and maintenance.
To avoid these costly downtime procedures, one developer and manufacturer of custom-made equipment for the fabricating industry uses sliding slewing ring bearings for rotary motion on an ultrasonic welding machine. The iglide® PRT slewing ring bearings facilitate movement on both the x and y axis of the machine, which enable the welding gun to achieve numerous degrees of freedom. This means a variety of different welding jobs can be performed.
PRT slewing ring bearings do not require lubrication and are unaffected by welding dust produced by the machine and will not seize, unlike other bearing systems. The unit comes ready-to-install so the manufacturer can save time and money during the design and assembly process.
The iglide PRT range uses low-friction polymer sliding elements in place of ball bearings. These parts are made from a low-cost, high-performance polymer called iglide J, which is completely lubrication and maintenance-free. The bearings are suitable for all environments; in particular, semiconductor and cleanroom applications, assembly lines, production facilities, and robots.
The product is low-cost and available off-the-shelf. All the housing components are made from aluminum (except style 02 - which has wear-resistant iglide J head rings) and all the surfaces parallel to the iglide J sliding elements are hard anodized with stainless steel fasteners. Stainless steel and geared versions are also available upon request. The units are available with inside diameters of 30, 60, 100, 150, 200 and 300 mm.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 6303NR KOYO | 17 | 47 | 14 |
| 6203NR KOYO | 17 | 40 | 12 |