Specifications: Both rings posses deep grooves with a radius only slightly exceeding the ball radius. Due to this curvature ratio the bearing can support high radial forces as well as axial forces which make them ideal for a wide range of applications. Our main Ref. (Include open, z, zz, rs,2rs, n, nz) 605 to 6012,624 to 6212,6300 to 6310,693 to 6906, and R3, R4, R8, R10, R12, and non standard ball bearings. Our Quality: Tolerance: ABEC1, ABEC3, ABEC5, ABEC7 Material: GCr15(GB),100Cr6, AISI52100 Hardness: HRC61-HRC65 Groove surface quality: Below 0.05um