Specifications:

　1) Sliding contact surfaces: Steel vs. Steel.
　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: With oil grooves and oil holes. Outer race formed by extrusion.
　5) Properties: Good wearability, self-alignment.