Main parameter: Material:GCR15,SUJ2,AISI52001 Hardness:HRC60 65 Out diameter tolerance:0.001mm Length tolerance:0.03mm Parallelism:0.01mm Perpendicularity:0.01mm Endface runout:0.01mm Roundness:0.0005mm Roughness:Ra0.06um Main uses: 1.Crossed roller bearings 2.Joint bearings ...