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igus® Ltd.

Caswell Road

Northampton, NN4 7PW

01604 677240

Slewing ring bearings

Slewing ring bearings are ready-to-install slewing rings for lubrication-free, dry operations. The design is not based on metal rollers or balls but on maintenance-free sliding elements made of the proven tribologically optimised iglidur® materials.
This is in combination with rings made of lightweight anodised aluminium or stainless steel. iglidur® materials can be employed universally and enable use in applications involving high temperatures, moisture or contact with chemicals, as well as in the food industry.  
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PRT slewing ring options

iglidur® slewing ring, PRT-01

PRT 01
  • For very high loads and high rigidity
  • Completely maintenance-free
  • Easy to install and replaceable sliding pads
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iglidur® slewing ring, PRT-02

  • Extremely light weight slewing ring
  • Head rings made from iglidur® J4
  • For very high loads and high rigidity
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iglidur® slewing ring, PRT-04

PRT 04
  • Even more compact design possible
  • For high loads, high stiffness
  • Simple assembly, replaceable sliding elements
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PRT toothed outer ring

PRT toothed
  • 4 standards for the toothing of the outer ring
  • Easy to install and replaceable sliding pads
  • Body and toothed outer ring made of aluminium
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xiros® slewing ring ball bearing

PRT xiros
  • Chemically resistant
  • Low humidity absorption
  • Cage material: xirodur B180
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PRT stainless steel housing

PRT stainless steel
  • ESD compliant
  • Replaceable sliding elements made of iglidur® F2
  • Stainless steel housing
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PRT slewing ring accessories

slewing ring accessories
  • Manual clamping
  • Drive shafts
  • Sliding pads
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Other designs

slewing ring other designs
  • Square flange options
  • Options with pretension
  • Integrated pin drive
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PRT special parts

PRT special parts
  • Does a standard PRT now quite fit?
  • We can make you a bespoke version to suit your requirements. 
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Configure your PRT slewing ring system

The slewing ring configurator will enable you to discover the most suited slewing ring for your application. With just a few simple steps, the expert system can decipher which PRT slewing ring is suitable and can calculate the expected service life. If you need help with the configuration tool please visit our blog for step-by-step instructions.
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Frequently asked questions about slewing ring systems

Can I restrict the rotation of my slewing ring (PRT)?

Yes, of course. We have a couple of ways in which this can be achieved to any number of degrees. Our Angle limiter kit comprises of the limiter, a limiter stop and pin which all work externally and can be adjusted by yourself. This can be readjusted should the degree of rotation change for your application.

Can I have a slewing ring with multiple ‘home’ positions?

Yes, this is possible. In late 2021 we have released a product which uses a spring plunger to drop in to fixed location points as the slewing ring rotates. Favourites, and standards are 90, 180 and 240 as well as the 0 point.

I need a non-reflective PRT, is black anodising a possibility?

Yes it is and not only that, but we can offer it with black, self-lubricated liners, so the whole product is black in colour.

I’d like a different colour part as the silver stands out. Can you anodise black?

Yes, black along with other colours are available for anodising. There are other options to consider also.

Read more here

Advantages of the iglidur® PRT slewing ring bearings



Manufacturing with injection moulding or 3D printing guarantees cost efficiency and creates the geometrical freedom to optimise use of installation space. Thanks to the flexible modular system, the slewing ring ball bearings can be extended as required. 

Lubrication and maintenance-free

Lubrication-free The iglidur® PRT slewing ring is designed as a ready-to-install solution, so it is ready to use straight away and requires no additional lubrication or maintenance. This saves time and reduces maintenance costs.

Up to 60% lighter


The iglidur® bearing technology impresses with ultra-light materials, such as plastic and aluminium. This enables you to achieve greater efficiency in your application. 

Quiet dry operation

Quiet operation for slewing ring bearing PRT
The igus® PRT slewing ring bearings with plastic sliding elements produce significantly less noise and vibrations. For you as an operator, plastic gears - for example in robots - lead to an application that is up to four times quieter.

Resistant to chemicals and media

Suitable for the food industry (FDA) and for daily cleaning with cleaning agents and high pressure. PRT slewing ring bearings are also an ideal solution for special applications with high temperatures of up to 180°C or ESD.
The rings are made of plastic, aluminium or stainless steel.

Tested and proven

Icon tested Our in-house test stations are available for individual customer tests. We also test our slewing ring bearings daily for active research and development. 

Interactive 3D models

igus test laboratory Here you can find interactive 3D models of our PRT slewing ring bearings. Gain detailed insights into the individual products and their components.

CAD files

CAD file download Our CAD application gives you access to 2D/3D CAD files in various formats. Alternatively, you can transfer CAD data directly to your CAD system using our Click2CAD toolbox. 


I would be happy to answer your questions

Alan Hicks

Business Unit Leader for Fast Growing Products

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Shipping and consultation

In person:

Monday to Friday from 8am - 8pm.



The terms "igus", "Apiro", "chainflex", "CFRIP", "conprotect", "CTD", "drylin", "dry-tech", "dryspin", "easy chain", "e-chain", "e-chain systems", "e-ketten", "e-kettensysteme", "e-skin", "e-spool", "flizz", "ibow", "igear", "iglidur", "igubal", "igutex", "kineKIT", "manus", "motion plastics", "pikchain", "readychain", "readycable", "ReBeL", "speedigus", "triflex", "robolink", "xirodur", and "xiros" are legally protected trademarks of the igus® GmbH/ Cologne in the Federal Republic of Germany and where applicable in some foreign countries.

igus® GmbH points out that it does not sell any products of the companies Allen Bradley, B&R, Baumüller, Beckhoff, Lahr, Control Techniques, Danaher Motion, ELAU, FAGOR, FANUC, Festo, Heidenhain, Jetter, Lenze, LinMot, LTi DRiVES, Mitsubishi, NUM,Parker, Bosch Rexroth, SEW, Siemens, Stöber and all other drive manufacturers mention on this website. The products offered by igus® are those of igus® GmbH