It avoids contact between metals
High bearing capacity
Can compensate the boundary force
Good wear resistance and long life
friction
Can restrain mechanical vibration
Dust-proof effect is good, allowing external guide to embed
Can absorb side load
There is no problem with hydrodynamic direction in the steering gear
Simple integral groove, easy installation
Low maintenance cost
Due to the alignment of the wear ring, the extrusion clearance of the seal can be increased