through hole slip ring. (the center hole can access the transmission shaft, gas-liquid channel; it can also ...    More ...

through hole slip ring. (the center hole can access the transmission shaft, gas-liquid channel; it can also integrate high-frequency, optical fiber, waveguide, gas-liquid and other types of joints). It uses advanced cluster brush multi-point contact to ensure reliable contact under low friction. The center hole can be selected from 0 to 1200 mm, current can be selected up to 1000 ampere, and voltage can be up to 2000 volts.
for details: https://customslipring.com/through-bore-slip-ring/

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