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Guide rings prevent metal-to-metal contact between moving parts in a working hydraulic cylinder. The low friction PTFE material reduces "stick slip" between moving parts. The material is compatible with hydraulic mineral oil, lubricating oil, water based fluids and lubricating grease. It has excellent heat resistance and strength to resist creep.
Main Features
Suitable for dry application use
Heat resistance
High load capacity (compressive strength)
Low wear and reduced friction due to special additive in PTFE material
High resistance to insufficient lubrication at low speeds
Flexibility for installation
Good shock absorbing capability
Typical Applications
Hydraulic cylinder piston/rod
Pneumatic piston/rod
Application Notes
| Pressure | ≤30 Mpa |
| Stoke speed | Continuous operation: 0.5 m/s Intermittent operation: 1.2 m/s |
| Temp. range | – 200°C ~ +260°C |
Material Selection
| Material | Characteristics | Temperature Range |
| PTFE + bronze | Preferred use on hard counterfaces, standard material in hydraulic systems. | -200°C ~ +260°C |
PTFE + carbon/graphite | Used on softer counterfaces, such as e.g. stainless steel, aluminum and bronze and also preferred when the media water and steam are involved. | -200°C ~ +260°C |
| Phenolic resin | This material is featured in its high load capacity, excellent temperature resistance,abrasion resistance and excellent dimensional stability. | -40°C ~ +130°C |
| Polyacetal(POM) | Guide rings of polyacetal (POM) are characterized by good frictional behavior, stick-slip-free running, high load-bearing capacity and optimum wear resistance. | -40°C ~ +110°C |
Installation Dimensions
| Cylinderø D | Gap Z | Clearance g | Radius Rmax |
| < 40.0 | 1.0 - 3.0 | 0.25 - 0.4 | 0.2 for ø D ≤ 250.0 |
| < 80.0 | 3.0 - 6.0 | 0.25 - 0.5 | |
| < 140.0 | 5.0 - 10.0 | 0.3 - 0.6 | 0.4 for ø D ≤ 250.0 |
| < 340.0 | 7.0 - 14.0 | 0.4 - 0.6 |
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