High accuracy

New material for particularly low bearing clearance

With iglidur G2, iglidur plain bearings reach a new level of precision. The particularly low moisture absorption and thermal expansion combined with high dimensional stability enable very low bearing clearance (G9). Ideal for applications where very quiet operation is required.

Tech up

Improved haptics due to tight bearing clearance

Cost down

Up to 40% more cost-effective than comparable metal bearings

Proof

Approx. 40% less clearance compared to iglidur G (G9 vs. E10)

Sustainability

The lubrication-free dry operation helps to save lubrication

igus supports the circular economy of plastics and invests in chemical recycling. Find out more.

Clearance reduction? No easy matter!

How we can reduce bearing clearance by 50%

By Lars Butenschön, Head of Business Unit iglidur Plain Bearings

Bearing clearance is an important factor in many plain bearing applications. Particularly in end-user products with moving parts such as bicycles or household appliances, but also toys and even machines, excessive bearing clearance manifests itself in the form of rattling and noise. These haptics play a major role in whether an appliance has a "high-quality" appearance or not. At the same time, a low bearing clearance also increases the quiet operation of plain bearing applications.

Reason enough, therefore, to strive for the lowest possible bearing clearance. A certain bearing clearance is not only necessary for reasons of process-reliable manufacturability, for example to compensate for manufacturing tolerances. It also compensates for the expansion of the materials used due to heat or moisture. Materials expand or contract to varying degrees under the influence of temperature. At the same time, certain materials also absorb significant amounts of moisture – e.g. from air humidity

Plastics are often particularly prone to expansion under the influence of temperature and humidity, which is why a certain bearing clearance is required to compensate for this in bearing applications. Without this compensation, the shaft would jam in the bearing in some applications, which can usually result in damage to the bearing or even surrounding equipment.

As not all plastics are subject to the same expansion, there are various fits within the iglidur dimensional range of over 3,000 dimensions, ranging from D11 to E10 to F10. These fits are achieved by press-fitting them into a housing bore with H7 tolerance and are suitable for most plain bearing applications in combination with a shaft with a H9 tolerance.

However, users often require an even lower bearing clearance. These requirements can often be met in customised products by carefully matching the iglidur material used with the wall thickness and length of the component, as well as the tolerances of the surrounding components.

Based on the material iglidur G2, which has been optimised for low moisture absorption, thermal expansion and processability, we can now offer a complete range of dimensions with reduced clearance. The new material joins the range of iglidur G materials and also offers good running performance on many different shafts in most areas of application with low to medium-high loads and low to medium speeds, especially with pivoting or rotating motion profiles.

Consulting

I look forward to answering your questions

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