Wear rates and friction of plastics

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In summary, the conversation discusses the replacement of a brass and steel sleeve and cylinder with a plastic sleeve and cylinder for a probe that uses Eddy current. The speaker is looking for a plastic material with comparable wear rates to ceramic and low friction between two layers. Vespel is suggested as a potential option, but further discussion with an applications specialist is recommended for bearing-shaft issues.
  • #1
es_shoes
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I am looking to replace a set of brass and steel sleeve and cylinder having a ceramic tip with a plastic sleeve and cylinder having a plastic tip. The only question I have actually has two parts... are there any plastic, machineable materials that have comparable wear rates to that of ceramic? The probe enclosed on this setup works off the Eddy current, so the tip can't be metal. Just wondering if anything pops out at you guys for a strong plastic with good wear rates, and low friction between two layers of that material. Thanks in advance.
 
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  • #2
I'd certainly look at Vespel. It won't wear as well as ceramic (what will!), but it's pretty good. You're probably going to want to talk to an applications guy about bearing-shaft issues. You'll need to have speed and radial load specs when you do.
 
  • #3
I definitely will look at Vespel, thanks. The good part about the bearing-shaft setup is that it won't rotate like a wheel bearing, it will just move up and down slightly (its own weight is the only load)- to allow for measurement of changes of web thickness- from 0 to 10 mils. Thanks again.
 

Related to Wear rates and friction of plastics

1. What is wear rate?

Wear rate refers to the amount of material that is lost over time due to friction and other forms of mechanical stress.

2. How is wear rate measured?

Wear rate is typically measured by conducting experiments where a plastic material is subjected to a specific load and motion, and then measuring the weight loss or surface roughness of the material over a certain period of time.

3. What factors affect the wear rate of plastics?

The wear rate of plastics can be affected by various factors such as the type and properties of the plastic, the load and motion applied, the environmental conditions, and the presence of any additives or fillers in the plastic.

4. How does friction affect the wear rate of plastics?

Friction is one of the main causes of wear in plastics as it generates heat and mechanical stress on the material, leading to wear and degradation over time. Reducing friction can help to decrease the wear rate of plastics.

5. Can the wear rate of plastics be improved?

Yes, the wear rate of plastics can be improved through various methods such as using lubricants, optimizing the design and material selection, and incorporating additives or fillers to enhance the wear resistance of the plastic.

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