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Rulon Bearings
Greene Tweed AR™ 1 Abrasive-Resistant Thermoplastic
Categories: Polymer; Thermoplastic

Material Notes: Sand and other abrasives are often a challenge for pump users in the power industry. Clearances on line shaft bearings and bowl wear rings open up, increasing pump vibrations and reducing pump efficiency. Greene Tweed’s proprietary AR™ thermoplastic materials exhibit outstanding wear characteristics in media containing solids.

AR1 offers excellent abrasive resistance as well as chemical resistance approaching that of PTFE. AR1 is rated from ambient to 120°F (49°C). AR1 is easy to machine, and clearance requirements are easily determined. AR1 works well in a variety of pumps in the power industry including those working with circulating water as well as screen wash pumps. AR materials have performance characteristics that exceed traditional technologies such as cutlass rubber, bronze and carbon materials.


  • Circulating water pumps
  • Open and closed cooling water pumps
  • River water pumps
  • Screen wash pumps
  • Sump pumps

Information provided by Greene Tweed.

Available Properties
  • Specific Gravity, ASTM D792
  • Hardness, Shore D, ASTM D2240
  • Tensile Strength, Yield, ASTM D4745
  • Elongation at Break, ASTM D1457
  • Tensile Modulus, ASTM D638
  • Flexural Strength, ASTM D790, at 5% strain
  • Flexural Modulus, ASTM D790
  • Compressive Strength, ASTM D695
  • Compressive Modulus, ASTM D695
  • CTE, linear
  • Maximum Service Temperature, Air
  • Minimum Service Temperature, Air
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Ensinger PEI
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