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Piston Wear Rings

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  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      1.19
    • Width - A (+/- 0.762 mm) (mm)
      30.10
    • Outside Diameter (mm)
      80.00
    • Inside Diameter - B (+/- 0.08inch) (mm)
      73.98
    • Outside Diameter (in)
      3.15
    • Inside Diameter - B (+/- 0.08inch) (in)
      2.91
    • Width - A (+/- 0.03inch) (in)
      1.19
    • Width - A (+/- 0.762 mm) (mm)
      30.10
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  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      2.00
    • Width - A (+/- 0.762 mm) (mm)
      50.80
    • Outside Diameter (in)
      6.50
    • Inside Diameter - B (+/- 0.08inch) (mm)
      158.52
    • Inside Diameter - B (+/- 0.08inch) (in)
      6.24
    • Outside Diameter (mm)
      165.10
    • Width - A (+/- 0.03inch) (in)
      2.00
    • Width - A (+/- 0.762 mm) (mm)
      50.80
    Compare
  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      1.25
    • Width - A (+/- 0.762 mm) (mm)
      31.65
    • Outside Diameter (mm)
      127.00
    • Inside Diameter - B (+/- 0.08inch) (in)
      4.74
    • Outside Diameter (in)
      5.00
    • Inside Diameter - B (+/- 0.08inch) (mm)
      120.42
    • Width - A (+/- 0.03inch) (in)
      1.25
    • Width - A (+/- 0.762 mm) (mm)
      31.65
    Compare
  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      2.75
    • Width - A (+/- 0.762 mm) (mm)
      69.85
    • Inside Diameter - B (+/- 0.08inch) (mm)
      202.97
    • Outside Diameter (in)
      8.25
    • Inside Diameter - B (+/- 0.08inch) (in)
      7.99
    • Outside Diameter (mm)
      209.55
    • Width - A (+/- 0.03inch) (in)
      2.75
    • Width - A (+/- 0.762 mm) (mm)
      69.85
    Compare
  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      4.00
    • Width - A (+/- 0.762 mm) (mm)
      101.60
    • Inside Diameter - B (+/- 0.08inch) (mm)
      260.12
    • Inside Diameter - B (+/- 0.08inch) (in)
      10.24
    • Outside Diameter (in)
      10.50
    • Outside Diameter (mm)
      266.70
    • Width - A (+/- 0.03inch) (in)
      4.00
    • Width - A (+/- 0.762 mm) (mm)
      101.60
    Compare
  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      0.75
    • Width - A (+/- 0.762 mm) (mm)
      19.05
    • Inside Diameter - B (+/- 0.08inch) (in)
      2.99
    • Outside Diameter (in)
      3.25
    • Outside Diameter (mm)
      82.55
    • Inside Diameter - B (+/- 0.08inch) (mm)
      75.97
    • Width - A (+/- 0.03inch) (in)
      0.75
    • Width - A (+/- 0.762 mm) (mm)
      19.05
    Compare
  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      1.25
    • Width - A (+/- 0.762 mm) (mm)
      31.65
    • Inside Diameter - B (+/- 0.08inch) (in)
      5.24
    • Oversize Dim
      0.030
    • Inside Diameter - B (+/- 0.08inch) (mm)
      133.12
    • Outside Diameter (mm)
      139.70
    • Width - A (+/- 0.03inch) (in)
      1.25
    • Width - A (+/- 0.762 mm) (mm)
      31.65
    Compare
  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      1.13
    • Width - A (+/- 0.762 mm) (mm)
      28.70
    • Inside Diameter - B (+/- 0.08inch) (mm)
      77.41
    • Inside Diameter - B (+/- 0.08inch) (in)
      3.05
    • Outside Diameter (mm)
      82.55
    • Outside Diameter (in)
      3.25
    • Width - A (+/- 0.03inch) (in)
      1.13
    • Width - A (+/- 0.762 mm) (mm)
      28.70
    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.