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A sustainable combination: igus successfully tests plastic bearings with wooden shafts

Resource from:  https://www.designworldonline.com Likes:250
Jun 30,2023

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Wood and plastic? Is that a good combination? The motion plastics specialist igus has researched the idea in a recent design study and tested the friction and wear behavior of its plastic linear bearings on a wide variety of wood, and the result is impressive. The igus econ J4 plain bearing has demonstrated its exceptional compatibility with various kinds of wood, opening new possibilities for furniture makers and design engineers when choosing materials.

The iglide J4 made up of as much as 97% regranulate material, provides igus with a plastic that has a CO2 footprint of at least 60% smaller than a standard bearing. It is a cost-effective, dry-running linear plain bearing with large contact surfaces and has already proven itself as a wear-resistant mating partner on soft shafts such as aluminum and carbon fiber. Now a new material is being added: wood.

Lars Fenger, product developer at igus GmbH, explains the idea, “We were trying to think through our sustainability concept. We have been working with recyclate in our maintenance-free high-performance plastics for years. We asked how we could replace the shaft material with a sustainable solution, and wood was an obvious choice.”

The igus solution gives the customer a metal-free, lightweight, cost-effective linear guide. Flexural strength tests were first carried out on different wood types to determine the right type of wood from the diverse selection available.

“We then tested various linear plain bearings on the wooden shafts and compared them with the values on steel shafts. We used the same test equipment and applied the same conditions for all of this. The result was a bit of a surprise,” says Lars Fenger.

Coefficients of friction comparable to those of steel and aluminum
The tests were performed in the in-house 3,800-square-meter igus test laboratory in Cologne, where igus tests its products to complete failure. The wear coefficients determined for iglide J4 with wood shafts differed only slightly from those for steel and aluminum. The friction coefficients showed that wooden shafts with wooden bearings fail quickly without lubrication. At the same time, a liner made of iglide J4 can help reduce displacement resistance for a long time and do it almost silently.

Since wood is a working material that changes with temperature and humidity, the application should be checked in advance, including in the igus laboratory. But it is highly recommended wherever environmental conditions remain constant, such as interior design for small living spaces or furniture construction. Many igus customers already use plastic, plain bearings in conjunction with wood. An important reason for this is the easy assembly and disassembly of the liners, which allows materials to be separated cleanly at the end of the product life cycle.


(https://www.designworldonline.com)
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