The best sliprings are made by Mercotac, they are expensive but they will outlast any other slipring. You can get them cheaper on eBay sometimes depending on the model (number of contacts and current rating). The two contact ones are cheaper, I have used the 6 and 8 contact 30 amp models.
--- In SeattleRobotics@yahoogroups.com, James Hughes <james@...> wrote:
> Can anyone recommend a good make of slip rings? 2 contacts (power/ground),
> ~3amps, preferably brushless?
> The application is a very slow moving kinetic sculpture - like 1 rotation
> per day. It's a public art project, so it's unlikely to get serviced very