Parker Wear Rings
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WPT Profile, Tight-Tolerance Piston Wear Ring
WPT profile tight-tolerance piston wear rings are the premier bearings for light- to heavy-duty hydraulic applications. WPT profile wear rings are available in standard sizes from 1″ up to 12″ bore diameters (larger sizes upon request). WPT profile wear rings feature chamfered corners on the I.D. and are designed to snap closed during assembly to hold tight against the piston, eliminating bore interference and simplifying installation.
Technical Data
Standard Material: W4733 WearGard™
Radial Tolerance: +.000″/ -.002″ (up to 6″ O.D.); +.000/-.003″ (6″ to 12″ O.D.)
End Cuts: Butt Cut, Angle Cut (Skive Cut), Step Cut
WRT Profile, Tight-Tolerance Rod Wear Ring
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WRT profile tight-tolerance rod wear rings, when combined with the WPT profile, complete the premier cylinder bearing system. Recommended for light- to heavy-duty hydraulic applications, they are available in standard sizes from 7/8″ up to 7″ rod diameters (larger sizes upon request). WRT profile wear rings feature chamfered corners on the O.D. and are designed to snap open during assembly to hold tight against the head gland, eliminating rod interference and simplifying installation.
Technical Data
Standard Material: W4733 WearGard™
Radial Tolerance: +.000″/-.002″ (up to 5-3/4″ I.D.); +.000/-.003″ (5-3/4″ to 7″ I.D.)
End Cuts: Butt Cut, Angle Cut (Skive Cut), Step Cut
PDT Profile, PTFE Wear Strip for Rod and Piston
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PDT profile wear strip is available in a variety of PTFE blends and provides excellent low-friction performance in pneumatics and lightduty hydraulics. PDT profile wear strip is available in cut-to-length versions as well as bulk strip. Cut-to-length part numbers reduce prep time by providing precision end cuts and ready-to-install diameters. Bulk strip offers versatility and reduces part number inventory by providing universal sizing in one part number.
Technical Data
Standard Materials:
- 0401 – 40% Bronze-Filled PTFE
- 0307 – 23% Carbon, 2% Graphite-Filled PTFE
Radial Tolerance: +.000″/-.004″
End Cuts: Butt Cut, Angle Cut (Skive Cut), Step Cut
PDW Profile, Machined Wear Ring for Rod and Piston
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PDW profile wear rings are precision machined PTFE bearings, lathe cut to exact size and shape. PDW profile wear rings offer precise fitting and easy installation. The wide range of available PTFE blends gives these machined wear rings versatility to accommodate any pneumatic or light-duty hydraulic application requiring low friction and high-temperature capabilities.
Technical Data
Standard Material
- 0401 – 40% Bronze-Filled PTFE
- 0307 – 23% Carbon, 2% Graphite-Filled PTFE
Alternate Materials (Composite Fabric-Reinforced Resins)
- 0810 – Standard Polyester-based with PTFE
- 0811 – Graphite-filled Polyester Based
- 0812 – MoS2-filled Polyester Based
- 0813 – PTFE-Filled Polyester Based
Radial Tolerance: +.000″/-.004″
End Cuts: Butt Cut, Angle Cut (Skive Cut), Step Cut
ESP – Parker “Seal Technology Center”
ESP International is proud to be one of the few premier distributors to qualify as a “Parker Seal 
Technology Center (STC)”.
- Proven Engineering Capability
- ISO Quality Approval
- Strong Financial Track Record
