Shaft grounding system

Shaft Grounding Systems

Currents generated by ICCP systems and sacrificial anodes can enter the propeller shaft through the propeller. If left undrained, this can cause stray currents that might cause corrosion in the propeller shaft bearings or gearboxes.

Our shaft grounding (shaft earthing) systems drain any current sent out by the anodes. This prevents corrosion and premature failure of vital parts of the propulsion train. Generally speaking, every propeller shaft on a ship should be fitted with a grounding system.

Contact us if you have a question or want to receive a quotation!


The system consists of a set of silver brushes sliding over a copper slip ring with a silver strip. The silver brushes are pressed on the silver strip, ensuring maximum contact with the least resistance and thus allowing for optimal drainage of the current. The brush holders are mounted around the shaft utilising spindles, of which we have two types:

  • Electrically isolated: Brush and brush holder are connected to a power unit to monitor the shaft grounding system’s performance
  • Non-isolated: A bare metal spindle is used for draining the current to the hull

Replacement silver brushes can be orderd through our contact form.

Eric Bouman

Sales Manager Cathodic Protection & MGPS

Related Products & Services

Sacrificial Anodes
Read more
Impressed Current Cathodic Protection (ICCP)
Read more
Cathodic Protection Surveys
Read more
Research & Development
Read more