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Hi all, Im a master student elec

Hi all, Im a master student elec

Hi all, Im a master student elec

(OP)
Hi all,

Im a master student electromechanics at the University of Ghent. In the context of my thesis I have to measure the film thickness between gear teeth by the method of capacitance measurement. In order to do so I have to make an electrical connection to two shafts. I am planning on doing this with C-brushes and a friction ring around the shaft. I'm currently looking for the best material for that friction ring and I found that the most used materials are (stainless) steel and copper. I looked for some comparing studies and I found that steel is better for high-speed applications and has a better mechanical strength. On the other hand I found some studies that claimed that copper is a better material. For the film thickness measurements, the rotation speed will be around 2500 rpm and the current that will be needed to conduct will be lower than 1 A. I suppose this is a high speed, low current application. What kind of material (copper or steel) would be favorable for these conditions?

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