Specifications:

　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.