Thordon Bearings

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High performance polymer bushing

Thordon Bearings solutions reduce operating costs, provide long life, eliminate oil and grease while resisting abrasives.

  • Homogeneous polymers and thermoplastics
  • Self-lubricating and without risk of pollution
  • High resistance to abrasion and corrosion
  • Low operating friction
  • Long life expectancy
  • Easy to machine and install

Grades and configurations

ThorPlas-Blue - ThorPlas-White

Homogeneous material developed specifically for high load applications.

  • Maximum dynamic working pressure 45MPa (6527psi) static pressure 60MPa (8702psi)
  • Easily machinable without affecting the low coefficient of friction (typically 0.10-0.17)
  • Negligible wear in non-abrasive environments
  • Maximum service temperature of 80ºC (176ºF) in water and 110ºC (230ºF) dry
  • Excellent dry starting capability as vertical pump bearings
  • Good abrasion resistance - better than bronze, phenolics and most non-metallic bearing materials
  • Improved chemical resistance in most chemicals
  • NSF/ANSI 51 certification (ThorPlas-White)

Thordon SXL

Excellent dry starting ability and a lower coefficient of friction than other Thordon elastomer grades.

  • Maximum working pressure 10MPa (1450psi)
  • Reduced friction coefficient (typically 0.10 – 0.20)
  • Maximum service temperature of 60ºC (140ºF) in water and 107ºC (225ºF) dry
  • Higher abrasion resistance than XL in wet applications; good resistance to abrasion in dry uses
  • Useful in cases of dry starting of vertical pumps
  • High resistance to shock and vibration

Composite (GM2401) / RiverTough

A 2-part pad formulated specifically for use in highly abrasive environments.

  • Used in rotating applications where water is abrasive such as pumps or dredging
  • Impressive abrasion resistance 2 to 3 times higher than rubber
  • Much lower coefficient of friction than rubber
  • Resilience and hardness superior to rubber
  • Available in yellow or metallic polymer shells


Polymer bearing developed for ship propulsion shafts.

  • Unique design that promotes hydrodynamic film development
  • Low coefficient of friction makes starting easier
  • Water lubricated bushing eliminates oil in the stern tubes
  • No gasket required, water drains out the end of the stern tube
  • Approved by major classification societies
  • The addition of the cone key system allows inspection of the bearing without removing the shaft

Thor-flex (Thorseal)

Flexible polymer with high mechanical strength developed for sealing applications.

  • Long service life due to the self-lubricating properties of ThorSeal polymer
  • Higher elastic limit than other seals available on the market
  • High resistance to extrusion
  • Operating temperature from -50˚C (-60˚F) to 90˚C (195˚F)
  • Operating pressure of 0 – 15,000 psi
  • Custom manufacturing according to your application

Typical applications


Thordon has over 35 years of experience designing durable oil and grease free marine bearings. Without impact on the environment, our solutions exceed environmental standards while reducing ship operating costs.

  • Stern tube bearing
  • Stern tube seal (TG100 and SeaThigor, BlueWater)
  • Rudder bearing
  • ThorShield Shaft Coating Systems
  • Non-abrasive water supply (Thordon Water Quality Package)
  • Bearing Condition Monitoring System (BCMv2)
  • Windlass bearing, fairlead, deck equipment
  • Site Support Team (GSS)


Thordon offers a wide range of sustainable solutions for the manufacturing and rehabilitation of hydroelectric turbines.

  • Wicket gate and operating ring bearings and wear pads
  • Turbine Guide Bearing
  • Segmented shaft seal
  • Servomotor and seal applications
  • Non-abrasive water supply system for main guide bearing and segmented shaft seals (WQP)
  • Kaplan turbine
  • Butterfly valves
  • Site Support Team (GSS)

Industrial applications

Thordon offers reliable, cost-effective solutions for a wide range of industrial applications.

  • Grapples, cranes & shovels – Mining
  • Conveyor and mobile equipment bearings - Agriculture
  • Attachment bearing and seals - hydraulic and pneumatic cylinders
  • Dame gate bearings and pads - Civil
  • Wastewater and sewer treatment
  • Food equipment and drinking water

Vertical pumps

Thordon Bearings designs and manufactures a complete line of oil and grease free pump bearings for vertical pump applications.

  • Long life vertical pump bearing
  • Resists abrasive applications
  • Dry start capacity
  • NSF/ANSI 51/61 certification for food and drinking water (ThorPlas-White)