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Quick Answer: CORASEALS supplies wear rings and guide rings for hydraulic cylinders, pneumatic cylinders and cylinder repair programs. We quote from rod diameter, bore diameter, groove dimensions, fluid type, temperature, side load and existing ring dimensions. Send a drawing or measured dimensions to get a wear ring supplier quotation.
A wear ring is a bearing element installed on a piston or rod. It prevents metal-to-metal contact between the piston and the cylinder bore or between the rod and the cylinder head. A wear ring also helps absorb side load. The wear ring supports the moving parts before the piston seal or rod seal is damaged.
Wear rings are used in hydraulic cylinders, pneumatic cylinders, mobile equipment and industrial machinery. The ring size and material change with cylinder bore, rod diameter, operating temperature and side load.
Wear ring material must match the hydraulic fluid, temperature range, side load and sliding speed. Material options offered through CORASEALS include PTFE, filled PTFE, POM, UHMWPE and PEEK. Filled PTFE grades use glass, bronze, carbon or other fillers to improve wear resistance and compressive strength.
| Material | Selection Reason | Main Limitation to Check |
|---|---|---|
| PTFE | Low friction and broad chemical resistance | May deform under heavy compressive load, verify filled grade |
| Filled PTFE | Higher wear resistance and better load support than unfilled PTFE | The filler must be compatible with the hydraulic fluid |
| POM | Good dimensional stability and machinability | Not suitable for strong acids at elevated temperature without verification |
| UHMWPE | High abrasion resistance and low moisture absorption | Lower temperature limit than PEEK or filled PTFE, confirm with supplier data |
| PEEK | High temperature and high load capability | Higher cost and requires accurate groove fit |
The table gives general selection guidance. The final material choice must be checked against the fluid type, operating temperature and pressure. A wear ring that works in standard mineral oil may not be suitable for water glycol or phosphate ester fluids.
A wear ring does not use the same size system as an O-ring. The critical dimensions are the cylinder bore, piston outside diameter, rod diameter, groove width, groove depth and the existing wear ring ID, OD and width. Measure the old ring before removal when possible. A deformed or split ring may not show the original size.
A catalog part number helps identify a previous purchase. The part number alone does not confirm interchange. Always combine the part number with the section drawing, groove dimensions and measured ID, OD and width.
Wear rings are often replaced during cylinder rebuilds. The wear ring may show uneven wear, cracking, extrusion or a large gap after prolonged service. A heavily worn wear ring can allow piston or rod misalignment. Piston or rod misalignment can reduce the life of the piston seal and rod seal.
If the failed wear ring shows signs of extrusion, check the clearances and groove geometry. If the ring is brittle, check the fluid temperature and chemical exposure. Replace the wear ring with a material that matches the actual cylinder duty.
We do not rely only on a part number. We check the section, groove dimensions and material before quoting. That checking process reduces the risk of supplying a ring with the correct part number but the wrong fit. Send the measured values and the application details.
Send a wear ring RFQ. Send us the piston outside diameter, cylinder bore diameter, rod diameter, groove width, groove depth, existing wear ring ID × OD × width, hydraulic fluid type, operating temperature, pressure, side load, drawing or sample photo, and required quantity. We will use this information to recommend a wear ring material and size.
For full cylinder service, you may also need piston seals, rod seals, wiper seals, buffer seals and hydraulic cylinder seal kits. Send the rod diameter, bore diameter, groove dimensions and hydraulic fluid for a complete cylinder sealing package.
Q: What is the difference between a wear ring and a guide ring?
A: In hydraulic cylinder applications, the terms are often used for the same part. The part prevents metal-to-metal contact and supports side load. Confirm the groove design and installed location with the cylinder drawing.
Q: Does CORASEALS supply both metric and inch wear rings?
A: Yes. CORASEALS quotes wear rings from metric and inch measured dimensions. Send the ID, OD, width, groove dimensions and a drawing if available.
Q: What material should I select for a hydraulic cylinder wear ring?
A: The material depends on the fluid, temperature, side load and speed. Common options are PTFE, filled PTFE, POM, UHMWPE and PEEK. Replace the worn ring with the same material unless the old material shows a failure pattern.
Q: What dimensions does a wear ring quote require?
A: We need the cylinder bore, rod diameter, piston outside diameter, groove width, groove depth, existing wear ring ID × OD × width, fluid type, temperature, pressure, side load and quantity.
Q: Can CORASEALS supply wear rings for OEM cylinder builders?
A: Yes. We can supply wear rings for OEM production and replacement maintenance. Send the drawing, material specification and required quantity.
