Specifications:　　

　1) Sliding contact surfaces: Steel vs. Steel.
　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), surface phosphorized.
　4) Features of structure: Without oil groove or oil holes, with an axial split in outer race.
　5) Lubricant: molybdenum disulfide.
　6) Properties: Good wearability, corrosion resistance, self-alignment.