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Wear Ring Supplier for Hydraulic and Pneumatic Cylinder Applications
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.
What Is a Wear Ring and What Does It Do?
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.
Common Wear Ring Materials and Selection Limits
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.
Dimensions Needed Before You Order a Wear Ring
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.
- Piston outside diameter
- Cylinder bore diameter
- Rod diameter
- Groove width and groove depth
- Existing wear ring ID, OD and width
- Hydraulic fluid type
- Operating temperature and pressure
- Side load or cylinder mounting condition
- Required quantity
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.
Typical Wear Ring Failure Conditions
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.
- Uneven wear on one side of the ring
- Cracking or brittle failure
- Extrusion of the ring material from the groove