Specifications:

　1) Sliding contact surfaces: Steel vs. PTFE sintered bronzed mesh.
　2) Materials: Outer race is made of carbon steel, inner race is made of high chrome bearing steel.
　3) Heat treatment: Without heat treatment on outer race. Inner race is quenched (hardened), and surface plated with chrome.
　4) Features of structure: Without oil groove or oil hole. Outer race formed by extrusion. With a PTFE sintered bronzed mesh between outer race and inner race.
　5) Properties: Self-lubricated, good wearability, self-alignment.