The strip that reduces friction between the piston rod and the cylinder housing
In hydraulic and pneumatic systems, the guide strip is an element used to hold the piston rod of the hydraulic or pneumatic cylinder in place during the movement of the piston.
At JIORings, we sell the guide strip by meters or in rolls so that it can be cut to size. As it is not a formed seal (as the guide rings are #link), it can be adapted to the specific diameter of each cylinder, which makes it a very economical and versatile option.
This would be the formula to establish the correct length in each case:
- Internal applications for piston rod: L = 3.115 (ød + S) - 1.00
- External applications for pistons: L = 3.115 (øD + S) - 1.00
The main function of the strip is to reduce the friction between the piston rod and the cylinder housing, which minimices wear, reduces friction and increases the service life of the cylinder. In some cases, it can also prevent unwanted vibration and noise in the system.
How does the guide strip work in the cylinder?
In the case of hydraulic cylinders, the guide strip helps to keep the piston rod centred and stable during movement, reducing friction and wear and improving the efficiency and performance of the hydraulic system.
When a hydraulic cylinder is used to move a load, hydraulic fluid is sent into the cylinder through an inlet in one of the cylinder caps, which causes the piston to move forward or backward in the cylinder. The piston rod is attached to the object being moved and extends or retracts as the piston moves.
Like in hydraulic cylinders, the guide strip is an important component in pneumatic cylinders that helps keep the piston rod centred within the cylinder and prevents it from tilting or drifting sideways during movement.
In both cases, the guide strip is located on the inside wall of the cylinder, surrounds the piston rod and prevents it from tilting or drifting sideways during movement, keeping the piston rod centred and stable during movement, reducing friction and wear and improving the efficiency and performance of the system.
What types of guide strips do we stock?
- PTFE + 40% bronze
- PTFE + 10% carbon
- Phenolic resin
* PTFE = PTFE (polytetrafluoroethylene) is a thermoplastic polymer composed of fluoride and carbon molecules, popularly known by its commercial name, Teflon. PTFE is a material that is highly resistant to corrosion, moisture and oxidation, making it useful in a wide variety of applications. It can withstand exposure to acids, bases and other chemicals without decomposing and is also an excellent electrical insulator, making it useful in electrical and electronic applications. Its very low friction coefficient makes it a very slippery material and it does not adhere easily to other materials.
* PHENOLIC RESIN = a type of thermosetting polymer obtained from the reaction between phenol (an organic compound) and formaldehyde (a chemical compound). Phenolic resins are characterised by their high mechanical, thermal and chemical resistance, and by being fire resistant.