Frequently asked questions – iglidur® plain bearings

For more information about iglidur® plain bearings visit

igus® have multiple price breaks from 1 piece to 5000 pieces.

Yes, we can machine, mould, 3D printing or laser cut, depending on the part. Please contact us for for information or a quotation here.

igus® have a range of under water materials however, it will depend on your application which material you may need. Try our online configurator.

iglidur®X bearings are usually the best for mountain bike application however depending on which part of the bike will depend on the material. Click here for some suggestions. 

Alternatively, contact us here for an individual consultation.

Yes, we can machine parts to your drawing, send us the enquiry via this form and you will get a quote by return, usually the same day, certainly within 24 hours.

igus® plain bearings are designed to be pressed into a housing (with an H7 tolerance) The bearing will have a nominal size for the outer diameter. They are then secured by the press-fit. Please be aware that the outside diameter of the bearing is, depending on the nominal size, about 0.1 to 0.25 mm larger than the housing in the non-pressed state. The inner diameter will reach its final dimensions and tolerances when pressed in.

All of the igus® materials are RoHS compliant.  The RoHS abbreviation means “Restriction of (the use of certain) Hazardous Substances” You can find all details here.

All of our bearings run dry as you know, but sometimes extreme applications require an extra seal. Rubber seals in abrasive environments do not work very well, they wear out very quickly, however felt seals act as a filter and a seal when running dry, keeping out those abrasive particles. This allows for the bearings to last much longer in these really extreme environments, agriculture being one of them.

Plain and ball bearings are each based on different operating principles and therefore have different specifications. These specifications make them better or worse with regard to suitability for different applications. Plain bearings are one-piece components that consist of one or more materials and are intended to reduce friction either through integrated solid lubricants or additional lubrication. They are particularly suitable for applications in which a cost-effective and space-saving solution is required and where the combination of load and speed is not too high. Ball bearings consist of rings between which several balls or rollers are mounted. These rotate around the inner ring of the ball bearing and thus enable the adjacent components to move relative to each other. The advantage of ball bearings is precision, as they can be designed virtually clearance-free, as well as their particularly low rolling resistance. Similar to the coefficient of sliding friction of the plain bearings, this helps to make applications very smooth. However, plain bearings also require significantly more installation space for this. They are heavier, often more expensive and must be specially protected against dirt ingress and loss of lubricant.”

As you know, our iglidur® bearings are injection moulded.  The materials are homogeneous and this means that you get the same performance throughout the wall thickness. However, even with this predictable nature customers are demanding more high tech solutions to their reduction in downtime.  So, we have designed and are now producing iglidur® bearings with a wear detecting system inside the material. This allows the bearing to have a set amount of wear and when the bearing reaches this, it sends a signal to a module which alerts the customer that the bearing is due to be inspected. The signal is not sent at a failing point but it will need to be looked at soon.

iglidur® bearings are made up of high-performance polymers. There are many different materials to suit all environments and applications. Find out more about the different materials here.

Yes we do! We have a large range but the most popular ones are iglidur® ,X A350 and A500. These will be equivalent to the likes of PEEK & HPV.

Nylon is its own material as is iglidur®. They are not the same but have similar properties in some of the iglidur® materials. igus® have comparable materials that can be offered as an equivalent to Nylon or any other traditionally known plastics.

Currently not in the plain bearing range but we do offer them in the igubal range.

  • Load per bearing point between 100 and 1,000N
  • Surface speed between 100 and 1,300rpm
  • Available shaft diameters:
    6, 8, 10, 12, 13, 14, 15, 16, 17, 18, 20mm
  •  Tests at room temperature and up to 150°C
  • Underwater tests

We test them against the likes of POM-C, PEEK, PTFE , Nylon and many more.

Yes, the d1 dimension is but only after being press fit into the housing.

No, in their free state these bearings will be oversized. They will only be in tolerance after press fit.

Yes, our iglidur® A180 has this approval.

In more than 12,000 individuals tests a year on over 200 test rigs in the igus® test laboratory, all materials are thoroughly tested. The findings go into a unique knowledge database on the tribology of maintenance-free plastic plain bearings. This database enables us to select the ideal iglidur® plain bearing for our customers depending on the application and to calculate its anticipated service life.

This is dependent on the application. Mostly, igus® plastic bearings do not need to be stronger than metal bearings, but they will outlast them. Please email for some technical help or ring 01604 677240.

The variety of iglidur® materials has evolved over many years from a wide variety of customer requirements. The development of a plain bearing material often has something to do with squaring the circle. If an improvement is made in one particular direction, this usually happens at the expense of another specification. – Most technical applications can be covered by the five standard materials iglidur® G, J, X, W300 and M250.But when it comes to very specific or demanding applications, exhausting the last technical reserves or the last price-performance optimisation for high volume, the other iglidur® materials are becoming increasingly important. Moreover, the limits of use of non-lubricated plain bearings have shifted further in the last few years due to new iglidur® materials.

With a little application data, it is possible to make a preliminary selection with the help of the iglidur® product finder or to calculate the service life with the iglidur® service life calculator. The large variety of materials is quickly culled, leaving behind only the suitable materials.