Static electricity is generated by the rotation of the propeller shaft in the boats. If this static electricity is not grounded, it may damage on shaft bearings, boat hull, electrical and electronic systems. By grounding the shaft, the electrical resistance between the boat and the shaft is reduced and erosion damage is prevented. by connecting the boat shaft holder to the shaft is The generated static electricity transmitted to the grounding plate and any damage to the boat is prevented.
Depending on the diameter of the boat’s shaft, size of the the shaft holder and the carbon brush is vary.
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