Description TC series slip ring is a micro slip ring, of which there is a 7, or 15, or 20 mm through-bore in the center of the shaft. It has the advantages of capsule & through bores slip ring. This design features long life & low cost, and fiber Precious metal brush contact technology realizes ultimate performance in many challenging applications. With aluminum alloy body, double precision roller bearings provide smoother running, lower torque and lower electrical noise. It is suitable for transferring signal & low power.