Tough and maintenance-free — iglidur PRT slewing rings from igus

The design of the slewing rings from igus exploits the advantages of the tried and trusted iglidur polymer plain bearing range. All the housing parts are made of aluminium (316 stainless steel versions are also available), the iglidur sliding parts run on hard anodised aluminium, and all connecting screws are made of stainless steel.”

“All the slewing rings are very rigid, simple to fit, extremely wear-resistant and the maintenance-free sliding parts can be easily replaced,” says Matthew Aldridge of igus UK Ltd. “They are available ex-stock within 24 hours in seven sizes, either as the tough standard version described (design 01) or as the 200g light-weight and particularly low-cost design 02 -- in this case the head rings are made of iglidur J4 and run directly against the outer ring without lubrication.”

Manual clamp, drive plate and spacer rings are available as accessories. In addition, special solutions are available ex-stock, such as FDA-compliant slewing ring bearings (sliding parts made of iglidur A180) and slewing rings that are extremely chemical-resistant and can be used at up to 180°C (using the iglidur H1 bearing material).

Clean and dirty applications
The application spectrum of the lubricant-free polymer round table bearings is extremely varied. It ranges from clean applications found in medical or measuring technology to environments with a high level of soiling, such as in foundries. Quite often, the application involves pivoting (forwards, backwards and in intermittent use) at assembly stations or in-house transport conveyer systems, such as indexing tables and jig design. Many of these applications are manually driven. At the moment, igus is observing a trend towards systems with individual connection possibilities for drives through gear wheels. For these applications, the company can supply design 01 with a gear wheel fitted.

New sizes hold fifteen tonnes

The smallest iglidur rotary tables have inner diameters from only 20mm, the large versions have a diameter of 200mm – and now 300mm in the latest version. This largest size, known as PRT-01-300, is designed for greater loads and torques and can cope with an axial-static load of 15 tonnes. Maintenance-free applications are found to be particularly useful in heavy machinery design and solar technology applications.