This is large hole size slip ring with ID 200mm, it is used for offshore crane ,it’s a waterproof slip ring with IP65 protection grade ,it’s can work under water 1000M.The housing material is stainless steel ,contact material is precious metal .Typical application including beer machinery ,filling machinery ,drilling platform ,oil well . Features Center hole is easy to install. As well as integrate hydraulic,pneumatic,fiber optical,RF rotary joint May work under water 100m,anti-corrosion Applications For marine For offshore oil rigs Seaport machine Optional Through hole size Current rating Integrate various signal IP protection grade Specification Rings - 4*63A,12*10A Voltage - 0~380VAC/VDC Electrical noise - ≤70mΩ(50rpm) Dielectric strength - ≥1000V@50Hz Insulation resistance - ≥300MΩ@100VDC Operating speed - 0-100 rpm Contact material - Precious metal Housing material - Stainless steel IP protection grade - IP65 Through hole size - 200mm