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Piston Wear Rings

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  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      1.93
    • Width - A (+/- 0.762 mm) (mm)
      49.00
    • Inside Diameter - B (+/- 0.08inch) (mm)
      272.82
    • Outside Diameter (in)
      11.00
    • Inside Diameter - B (+/- 0.08inch) (in)
      10.74
    • Outside Diameter (mm)
      279.40
    • Width - A (+/- 0.03inch) (in)
      1.93
    • Width - A (+/- 0.762 mm) (mm)
      49.00
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  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      4.02
    • Width - A (+/- 0.762 mm) (mm)
      102.00
    • Inside Diameter - B (+/- 0.08inch) (mm)
      342.67
    • Inside Diameter - B (+/- 0.08inch) (in)
      13.49
    • Outside Diameter (in)
      13.75
    • Outside Diameter (mm)
      349.25
    • Width - A (+/- 0.03inch) (in)
      4.02
    • Width - A (+/- 0.762 mm) (mm)
      102.00
    Compare
  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      1.46
    • Width - A (+/- 0.762 mm) (mm)
      37.00
    • Outside Diameter (mm)
      317.50
    • Outside Diameter (in)
      12.50
    • Inside Diameter - B (+/- 0.08inch) (in)
      12.24
    • Inside Diameter - B (+/- 0.08inch) (mm)
      310.92
    • Width - A (+/- 0.03inch) (in)
      1.46
    • Width - A (+/- 0.762 mm) (mm)
      37.00
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  • Brand: Cat
    Ring
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      1.19
    • Inside Diameter (in)
      3.31
    • Width - A (+/- 0.762 mm) (mm)
      30.10
    • Inside Diameter (mm)
      84
    • Cross Section Width (in)
      1.17
    • Inside Diameter - B (+/- 0.08inch) (mm)
      83.98
    • Width - A (+/- 0.03inch) (in)
      1.19
    • Inside Diameter (in)
      3.31
    Compare
  • 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
    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)
      310.92
    • Outside Diameter (mm)
      317.50
    • Outside Diameter (in)
      12.50
    • Inside Diameter - B (+/- 0.08inch) (in)
      12.24
    • Width - A (+/- 0.03inch) (in)
      4.00
    • Width - A (+/- 0.762 mm) (mm)
      101.60
    Compare
  • Brand: Cat
    Wear Band
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      7.87
    • Width - A (+/- 0.762 mm) (mm)
      200.00
    • Inside Diameter - B (+/- 0.08inch) (mm)
      323.64
    • Height (in)
      7.8
    • Height (mm)
      198.1
    • Outside Diameter (mm)
      333.38
    • Width - A (+/- 0.03inch) (in)
      7.87
    • Width - A (+/- 0.762 mm) (mm)
      200.00
    Compare
  • Brand: Cat
    Availability
    Brand
    Cat
    • Width - A (+/- 0.03inch) (in)
      3.07
    • Width - A (+/- 0.762 mm) (mm)
      78.00
    • Outside Diameter (in)
      7.25
    • Inside Diameter - B (+/- 0.08inch) (mm)
      174.41
    • Outside Diameter (mm)
      184.15
    • Inside Diameter - B (+/- 0.08inch) (in)
      6.87
    • Width - A (+/- 0.03inch) (in)
      3.07
    • Width - A (+/- 0.762 mm) (mm)
      78.00
    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.