 |
|
| |
|
|
|
| Thermoplastics
|
POLYTETRAFLUOROETHYLENE-PTFE
This material is known as Teflon, the trademark of DUPONT Company. PTFE material does have the lowest coefficient of friction. Due to the low friction coefficient and high wear resistance, it is able to work on poorly lubricating conditions as well as high sliding speeds. PTFE can be used in temperatures between -200˚C to +260˚C. It has very good resistance to all chemicals except alkaline metals, high pressure-temperature chlorotriflour and basic floorings. Hardness and elasticity make the material to be used widely in hydraulic applications. Depending onto the application; glass, graphite, carbon, MoS2 and bronze filled PTFE can be used to increase mechanical and physical properties. The influence of the hydraulic media, the behavior in contact with the counter surface and the form stability depending on the operating temperature are the important properties when selecting the PTFE compound among the others.
|
|
POLYAMIDE-PA
This material is known as Nylon 6. It can be used in temperatures between -30°C to +120°C, for short period of applications this can be increased up to +140°C. Polyamide is able to work on poorly lubricating conditions and does have high wear resistance. It is commonly used as guiding elements in hydraulic and pneumatic systems. Special additives can increase the mechanical and physical properties of the material depending on the application.
|
|
POLYOXYMETHYLENE - POLYACETAL (POM)
It has excellent form stability between temperatures -40°C to +100°C, for short period of applications this can be increase up to +140°C. It is commonly used as guide and backup rings in hydraulic and pneumatic systems. It is being safely used in mineral oils, HFA and HFB type of oils. For the guide ring, glass filled POM is used due to its high contact pressure value.
|
|
|
|
|
| |
|
|
|
