Slip rings make continuous rotation possible in hydraulic machinery
Through bore slip rings / hollow shaft | rotarX
Taidacent Through Bore Electrical Slip Ring Rotate Conductive Energization Collector Ring Brushes Hollow Shaft Slip Ring (6 Wire Inner Hole 5mm X OD 22mm): Amazon.com: Tools & Home Improvement
Electro-Guard, corrosion and cathodic protection specialists for boats, yachts and small ships.
Rotating Through Hole Slip Ring Dia.60mm 18-Circuits 10A Hollow Shaft Slip Ring | eBay
RIE-TECH – Systeme für elektrischen Kontakt | Schleifringkörper, Steckkontakte, Schalter
Physics: Gantry Slip Ring Technology Used in CT scan - YouTube