1) Sliding contact surfaces: Steel vs. PTFE fabric.
2) Materials: Both outer race and inner race are made of high chrome bearing steel.
3)
Heat treatment: Both outer race and inner race are quenched (hardened),
outer race surfaces are phosphorized, inner race surfaces are plated
with chrome.
4) Features of structure: Without oil groove or oil hole.Sticked with a piece of PTFE fabric on inner surface of outer race.
5) Properties: Good wearability, low friction, corrosion resistance, self-alignment.
