MANUFACTURERS AND SUPPLIERS OF QUALITY MARINE EQUIPMENT
THORDON Marine Bearings

Water Lubricated Elastomeric Bearings.
  Thordon is the remarkable abrasion resistant, low friction and resilient sleeve bearing material, available in a wide variety of sizes and styles to suit any marine bearing requirement. For tail shafts and rudder bearing applications. Thordon provides the shipyard and vessel owner with significant advantages. Thordon marine bearings are available in a range of fully finished water-grooved, cylindrical bearings or in oversized semi-finished machineable tube shapes, and in radiused and dovetail staves. Rudder bearings are available in cylindrical form and radiused non-grooved staves.
 

There are four grades of Thordon, but the two most commonly used in marine applications are Thordon XL and SXL.
Thordon XL (black)
This grade is the most popular and has probably the best mix of general physical properties of all grades. It exhibits good impact strength, low friction, excellent abrasion resistance, high tensile strength and elongation. It has a much lower dry coefficient of friction than Thordon Regular. For comparisons of performance, operating conditions (including lubrication) should not be changed when converting to Thordon bearings. Thordon XL bearings when lubricated as per the manufacturer's instructions, can be expected to give up to four times the service life of conventional bearings.
XL Propeller Shaft Bearings are available in a full range of imperial and metric sizes for shafts from 3/4" to 40". These bearings have water flow grooves moulded in. They are designed as direct replacements for bronze/rubber 'Cutless' type bearings. XL Propeller Shaft Bearings are available fully-finished, ready to install and semifinished bearings for machined machining to suit specific shaft and housing dimensions.		 Thordon SXL (white)
Achieving its low friction characteristics by a different mechanism than XL, this grade offers the lowest dry dynamic coefficient of friction of all the Thordon grades. The lower the coefficient of friction, the less need a non-metallic has for conventional lubrication. SXL is designed to run with limited lubrication. SXL is designed to run with limited lubrication. Use it in those tough places where you know lubricants don't always reach, or where the job of greasing just doesn't get done.
Thordon SXL is often used for rudder pintle and rudder stock bearings.
 

 

Specifying Thordon
1
 Shaft size: This should be measured by micrometer or vernier.
Imperial measurements should be accurate to .001" and metric measurements accurate to two decimal places.
2
 Water
Temperature:		 It is important to know the temperature range of the water in which Thordon bearings will operate. This information influences the clearances recommended for satisfactory operation.
3
 Lubrication
Method:		 If the bearing is to be fitted to an 'A' or 'P' bracket, natural waterflow will provide adequate lubrication and cooling. If the housing is enclosed, a water flow of 4 litres/minute/inch of shaft diameter is required. This water can be pumped through the sterntube but the water must not come from the hot side of the engine.
 
Please contact us for further information on any of the THORDON materials
C.E.& A. Co. Pty.Ltd.
5 Schenker Drive, Royal Park.
South Australia. 5014		 Ph. (08) 8240 0777
Fax. (08) 8240 0711		 Int Ph. +618 8240 0777
Int Fax. +618 8240 0711		  
 
ceaco@ceaco.com.au Back Home
Information on this web page is extracted from the the manufacturer's literature.