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Tag: Plain bearings

What is meant by the stick-slip effect?

Lars Butenschön | 2. July 2019

The stick-slip effect refers to the jerking motion that occur when two solid bodies slide against each other. This phenomenon occurs when a body is moved whose static friction is significantly greater than the sliding friction. _x000D__x000D_  Imagine a heavy carton that you want to push over a smooth floor. The carton is heavy, which […]

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What is the technical core competence of igus concerning plastic bearings?

Lars Butenschön | 2. July 2019

Over the years, the material developers of igus have developed hundreds of material compounds, of which nearly 40 have now found their way into the polymer plain bearing catalogue. The basic structure is usually the same:_x000D_   1. Base polymers that characterise the fundamental tribological, mechanical, thermal and chemical specifications of the bearing 2. Fibres […]

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Why do the plain bearings not need any lubrication?

Lars Butenschön | 2. July 2019

Due to the special make-up of the iglidur materials, which are usually composed of a thermoplastic matrix, fibre reinforcements and so-called solid lubricants. The good wear and friction properties of the matrix or base material are additionally enhanced by the solid lubricants. During operation, there are always enough particles of solid lubricant on the surface […]

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When do you use a xiros polymer ball bearing instead of an iglidur polymer plain bearing?

Martina Kölsch | 2. July 2019

In general, it can be said that xiros polymer ball bearings are preferable to iglidur plain bearings where rotating movements with velocities above 1.5 metres/second can occur continuously with low loads. The significantly lower coefficient of friction of the polymer ball bearings compared to plain bearings ensures less heat generation and lower wear. Decisive is […]

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When I measure the plain bearings, I find them to be considerably larger than indicated in the catalogue. Why is this?

Lars Butenschön | 2. July 2019

Our plain bearings are press-fit bearings for housings with a standard H7 hole. This press-fitting of the bearings fixes the bearings in place in the housing, and the final inner diameter of the plain bearings is not arrived at until the bearing has been press-fitted.The bearing size is checked when the bearing has been mounted […]

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