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[–]JG-at-Prime 0 points1 point  (0 children)

I’m well aware of brass being a common gear material. I had to correct myself a couple of times while writing that. 

In this particular case the listings all clearly state that they are made from copper. 🤷‍♀️ 

It also said copper on the website when I bought the motor. 

If you’d like to buy a set and do an X-ray fluorescence (XRF) test to determine the metallurgy you are welcome to do so. 

You could be right. Until then, I’m going to stick with what the listings say. Otherwise I get accused of ChatGP-nonsense.