Markets / Marine


ACM Composite Bearings has extensive experience supplying bearings for the marine industry in a wide range of applications both above and below the water line. These include rudder bearings and steering gear, water lubricated propeller shaft bearings, bearings for anchor handling systems, crane bearings, life boat systems, winches, stern roller bearings, offshore moorings and so on.

ACM L2 Marine is our primary marine grade and is a high load composite bearing material that has been specifically formulated for marine environment applications. It comprises synthetic fabric reinforcement impregnated with a thermosetting resin and solid lubricant fillers.

L2 Marine is the only composite material approved to operate as a rudder bearing in wet and dry conditions at bearing pressures up to 10 MPa. Class approvals are held from many of the world’s foremost classification societies.

ACM L2 Marine has been tested and approved for stern tube bearing applications and has been proven to offer superior performance in terms of wear, extended life and low shaft wear over other water lubricated propeller shaft bearing materials. It is for these reasons that many navies use ACM material for their stern shaft bearings.


  • Rudder bearings
  • Rudder carrier bush & disk
  • Water lubricated propeller shaft bearings
  • Deck equipment
  • Offshore moorings
  • Stern rollers
  • Retractable thrusters

With increasing environmental and legislative pressure to control release of oils and greases into coastal seas and inland waterways, ACM’s materials offer an excellent solution – able to run dry in certain applications and with water lubrication in others. ACM materials suffer zero compatibility issues with EALs.

Emergency (marine repair bearings)
+44 (0) 7740 410 769