6-circuit slip-ring teardown

This is a fairly common item on eBay. The fact it's on eBay does mean it may be a dumpster product, but it's a good indication of what is available from better quality sources.
The electrical spec for this seems a bit zealous, especially when you see what's inside it. I think I'll give passing mains through this a miss. Even the 2A contact rating seems a bit generous.
But the construction actually turned out to be surprisingly good. Not just with two bearings, but a very clean construction with the rings also acting as guides for the sliding contacts.
For beefier applications AliExpress has some very rugged looking slip ring assemblies with carbon brushes and chunky brass rings.
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