Frequently Asked Questions about
Propeller Shaft Bearing Systems

  1. What is the bearing material used for propeller shafts?

  2. What is the minimum water flow to Thordon Propeller Shaft Bearings?

  3. What is the best liner to use in a dirty water-operating environment?

  4. What is the maximum operating pressure for Thordon stern tube bearings?

  5. Can we use after engine cooling water to flush and lubricate the propeller shaft bearings?

  6. Why should I use a RiverTough bearing instead of rubber bearing?

  7. Does RiverTough wear out the liner/sleeve quicker than a rubber tail shaft bearing?

  8. Can I run the RiverTough on a mild steel shaft?