A non-metallic bearing manufactured from a variety of high performance materials, with a butt cut for installation.
SC JOINT WEAR RING
A non-metallic bearing manufactured from a variety of high performance materials, with a scarf cut for installation and improved contamination resistance.
ST JOINT WEAR RING
A non-metallic bearing manufactured from a variety of high performance materials, with a step cut to reduce the potential gap.
CN WEAR RING
A non-metallic bearing manufactured in a continuous (no cut) ring from a variety of high performance materials.
STANDARD WEAR RING MATERIALS
The physical properties of the most commonly used wear ring materials.
SD - (Standard Duty) Fiberglass loaded Nylon. For general hydraulic cylinder use
FD - (Frictional Duty) Fiberglass and PTFE loaded Nylon. General hydraulic cylinder use with additional lubricant.
TB - (PTFE/Bronze) Highly lubricated for dry running surfaces and rotary use.
Design Data (Minimums)
Property
SD
FD
TB
Tensile Strength (psi)
24000
20000
2600
Compressive Strength (psi)
24000
20000
1700
Flexural Strength (psi)
35000
30000
3350
Coefficient of Thermal
Expansion (10 exp -5)
1.4
1.5
4.9
Water Absorption %
.9 to 1.3
.9 to 1.3
<0.25
Deformation Under Load
% @ 2,000 psi
0.5
0.5
-----
% @ 1,200 psi
-----
-----
2.3
WEAR RING GLAND DESIGN
Calculation steps for designing the glands for wear ring applications.
Click to open/download the following gland calculation worksheets:
