PFC-21 Synthetic Fiber Polyester Resin Wear rings
The function of a wear ring (or Guide ring) is to guide the piston and piston rod of the hydraulic cylinder, absorbing transverse forces. At the same time, the Wear Ring prevents metal-to-metal contact, optimizing the performance of the sealing system.
PFC-21 Material Structure:
Polyester resin + synthetic fiber
PFC-21 is composed of specialty synthetic fiber, reinforced polyester resin and self-lubricating micro powders. PFC-21 features in dimensional stability, good wear resistance and low friction, it has outstanding advantages in oilless or low-oil conditions.
PFC-21 Material Technical Parameters:
Part Number |
PFC-21 |
Test Method |
Color |
White |
/ |
Density |
1.2-1.4g/cm³ 0.043-0.051lb/in³ |
DIN 53476 |
Tensile Strength |
60MPa 8700PSI |
ISO 527 |
Ultimate Compressive Strength |
320MPa 46400PSI |
ISO 604 |
Impact Strength |
105 J/m |
/ |
Rockwell Hardness |
80HRM |
ASTM D-229 |
Coefficient of friction |
0.12-0.15(Dry) 0.06-0.10(Oil) |
ASTM D 1894 |
Temperature |
-40° to 130° C -40° to 266° F |
|
Wear Cut Styles:

Advantages |
Angle cut rings improve bearing stress at the gap. These rings tend to suit reciprocating movement. |
Straight Cut, also known as Butt Cut rings are the easiest style to install in many applications. Straight cut rings are best suited for rotary movement. |
Step cut rings also improve bearing stress at the gap. However, they offer better resistance to contaminants and spike loads. This type of design offers the best level of performance. |
Typical application:
Guide rings
Marine and Offshore Platform Bearings
Water Conservancy, Hydropower System Bearings
Food Machinery Bearings

Standard Size Sheet, additional sizes are available upon request.
Download PDF: PFC-21 Synthetic Fiber Polyester Resin Wear Rings.pdf