I suggest you search ebay for "slip ring".
I used some brass tube, the sort you get from hobby shops. I soldered wires on the inside and lead them out of the supporting rod through a slot. Then I arranged phosphor bronze leaf springs to make contact. It worked well.
Quote from: dc42 on Mar 12, 2013, 03:02 pmI suggest you search ebay for "slip ring".Surprisingly EBay does not have much listings. I can only see several hits and they are not the slip rings with a bore inside. So using it with a motor is bit more complicated because I need to add a pulley and a belt for the motor.