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Piston Wear Rings

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48
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  • Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      4.50, 0
    • Outside Diameter (in)
      7.75, 0
    • Width - A (± 0.03 in) (mm)
      114.30, 0
    • Outside Diameter (mm)
      196.85, 0
    • Inside Diameter - B (± 0.08 in) (in)
      7.37, 0
    • Inside Diameter - B (± 0.08 in) (mm)
      187.17, 0
    • Width - A (± 0.03 in) (in)
      4.50, 0
    • Outside Diameter (in)
      7.75, 0
    Compare
  • Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      1.25, 0
    • Outside Diameter (in)
      0, 6.50
    • Width - A (± 0.03 in) (mm)
      31.65, 0
    • Outside Diameter (mm)
      165.10, 0
    • Inside Diameter - B (± 0.08 in) (in)
      0, 6.24
    • Inside Diameter - B (± 0.08 in) (mm)
      158.52, 0
    • Width - A (± 0.03 in) (in)
      1.25, 0
    • Outside Diameter (in)
      0, 6.50
    Compare
  • Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      1.25, 0
    • Outside Diameter (in)
      0, 4.25
    • Width - A (± 0.03 in) (mm)
      0, 31.75
    • Outside Diameter (mm)
      0, 107.95
    • Inside Diameter - B (± 0.08 in) (in)
      0, 3.99
    • Inside Diameter - B (± 0.08 in) (mm)
      101.37, 0
    • Width - A (± 0.03 in) (in)
      1.25, 0
    • Outside Diameter (in)
      0, 4.25
    Compare
  • Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      0, 1.50
    • Outside Diameter (in)
      10.00, 0
    • Width - A (± 0.03 in) (mm)
      0, 38.00
    • Outside Diameter (mm)
      0, 254.00
    • Inside Diameter - B (± 0.08 in) (in)
      9.74, 0
    • Inside Diameter - B (± 0.08 in) (mm)
      247.42, 0
    • Width - A (± 0.03 in) (in)
      0, 1.50
    • Outside Diameter (in)
      10.00, 0
    Compare
  • Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      0, 1.46
    • Outside Diameter (in)
      13.50, 0
    • Width - A (± 0.03 in) (mm)
      37.00, 0
    • Outside Diameter (mm)
      0, 342.90
    • Inside Diameter - B (± 0.08 in) (in)
      0, 13.24
    • Inside Diameter - B (± 0.08 in) (mm)
      336.32, 0
    • Width - A (± 0.03 in) (in)
      0, 1.46
    • Outside Diameter (in)
      13.50, 0
    Compare
  • Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      3.25, 0
    • Outside Diameter (in)
      11.00, 0
    • Width - A (± 0.03 in) (mm)
      0, 82.55
    • Outside Diameter (mm)
      0, 279.40
    • Inside Diameter - B (± 0.08 in) (in)
      10.74, 0
    • Inside Diameter - B (± 0.08 in) (mm)
      0, 272.82
    • Width - A (± 0.03 in) (in)
      3.25, 0
    • Outside Diameter (in)
      11.00, 0
    Compare
  • Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      0, 3.08
    • Outside Diameter (in)
      9.50, 0
    • Width - A (± 0.03 in) (mm)
      78.20, 0
    • Outside Diameter (mm)
      241.30, 0
    • Inside Diameter - B (± 0.08 in) (in)
      0, 9.24
    • Inside Diameter - B (± 0.08 in) (mm)
      0, 234.72
    • Width - A (± 0.03 in) (in)
      0, 3.08
    • Outside Diameter (in)
      9.50, 0
    Compare
  • Wear Band
    Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      0, 6.50
    • Outside Diameter (in)
      0, 10.75
    • Width - A (± 0.03 in) (mm)
      165.10, 0
    • Height(in)
      6.6, 0
    • Outside Diameter (mm)
      0, 273.05
    • Width (in)
      10, 0
    • Width - A (± 0.03 in) (in)
      0, 6.50
    • Outside Diameter (in)
      0, 10.75
    Compare
  • Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      0, 2.37
    • Outside Diameter (in)
      7.00, 0
    • Width - A (± 0.03 in) (mm)
      0, 60.30
    • Outside Diameter (mm)
      0, 177.80
    • Inside Diameter - B (± 0.08 in) (in)
      0, 6.74
    • Inside Diameter - B (± 0.08 in) (mm)
      0, 171.22
    • Width - A (± 0.03 in) (in)
      0, 2.37
    • Outside Diameter (in)
      7.00, 0
    Compare
  • Ring
    Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      0.32, 0
    • Outside Diameter (in)
      0, 5.12
    • Width - A (± 0.03 in) (mm)
      8.25, 0
    • Inside Diameter (in)
      0, 4.8
    • Outside Diameter (mm)
      0, 130.00
    • Cross Section Width (mm)
      7.9, 0
    • Width - A (± 0.03 in) (in)
      0.32, 0
    • Outside Diameter (in)
      0, 5.12
    Compare
  • Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      0, 2.76
    • Outside Diameter (in)
      0, 10.00
    • Width - A (± 0.03 in) (mm)
      0, 70.00
    • Outside Diameter (mm)
      0, 254.00
    • Inside Diameter - B (± 0.08 in) (in)
      0, 9.74
    • Inside Diameter - B (± 0.08 in) (mm)
      247.42, 0
    • Width - A (± 0.03 in) (in)
      0, 2.76
    • Outside Diameter (in)
      0, 10.00
    Compare
  • Availability
    Brand
    Cat
    • Width - A (± 0.03 in) (in)
      0, 3.87
    • Outside Diameter (in)
      11.50, 0
    • Width - A (± 0.03 in) (mm)
      98.42, 0
    • Outside Diameter (mm)
      292.10, 0
    • Oversize Dim
      0, 0.030
    • Inside Diameter - B (± 0.08 in) (in)
      0, 11.24
    • Width - A (± 0.03 in) (in)
      0, 3.87
    • Outside Diameter (in)
      11.50, 0
    Compare
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  • Products
Cat® Piston Wear Rings support and center the piston to prevent metal-to-metal contact between the piston and the cylinder wall.
Piston wear rings are not very costly, but fitting new ones can be. That is because to fit them a mechanic most often has to take the entire engine apart. For this reason replacing piston wear rings on Caterpillar equipment is often done as part of the Cat® Certified Rebuild Program.