New igus slewing ring bearing delivers performance at compact size

Small but mighty: the PRT-04 micro can be integrated into very small customer applications with absolutely no lubrication while still accommodating high loads (Image: igus GmbH)

Requirements for machine components are becoming increasingly stringent: installing drives and allowing movements in even the smallest of installation spaces is a challenge that companies are facing in many areas. Now, igus has developed its PRT-04 slewing ring bearing series to suit these applications exactly—with a compact slewing ring bearing for even more space savings.

igus PRT-04 micro can save installation space and weight without sacrificing performance reliability while entirely eliminating lubrication. The company has added a small slewing ring bearing that is also robust to its product range. The PRT-04 micro has an outer diameter of 60mm, the smallest installation size among igus PRT slewing ring bearings. It consists of three aluminium rings and a newly developed sliding element made of the iglidur J plastic, which operates well on aluminium, ensuring good coefficients of wear and a long service life. It also has low moisture absorption and good chemical resistance. Other materials can also be used, depending on individual customer requirements. Like all igus bearings, the PRT-04 micro is 100% lubrication-free and thus insensitive to dirt, dust and moisture.

A lightweight for moving applications

“Aluminium with plastic offers two decisive design advantages: it is lightweight, yet stable. Thus, despite its small size, the PRT-04 micro can hold its own against comparable products on the market and accommodate high loads (up to 3,500N) in the axial direction, even though it is much more compact”, said Fabian Wieking, PRT slewing ring bearing product manager at igus. This allows for smooth rotary and swivel movements in even smaller installation spaces, giving rise to a number of possible applications.

The low weight is also relevant in all industries. Possible applications are small, movable lighting installations—so-called moving head applications—or swivelling tables in trains and aeroplanes, but also automotive applications. Low weight also pays off here in terms of fuel consumption. Less weight means less consumption, delivering another way to reach sustainability goals

Eliminating lubricants also adds value: maintaining equipment costs time and money. The solid lubricants in the iglidur material not only mean that the slewing ring bearing works without greases and oils, they also eliminate the need for maintenance while making the slewing ring bearing particularly durable.

Another advantage is that the PRT-04 micro is a ready-to-install part that can be integrated directly into an application. This eliminates design costs and DIY bearing points.

Ready to install or individually configurable: the best advice from PRT experts

Since 2019, igus has been offering users the PRT-04 slewing ring bearing series, an extensive and constantly growing modular system developed specifically for movements in confined spaces. It consists of a variety of combinable variants. The PRT expert provides assistance in selecting the right bearing: entering just a few parameters relating to installation space, load, speed and environment allows the configurator to find the right slewing ring bearing for the customer’s individual application and calculate the expected service life in the same step. The service life is checked thoroughly in igus’s own 3,800m2 test laboratory. The data collected there is integrated into the PRT configurator, providing analysis on slewing ring bearing service life.