Part Numbering System Engineering Basic Technical Information - Part1, Part2 Engineering Services Inch Series Ball Bearings, Radial Design Materials Radial Open, Unflanged Cages Radial Open, Flanged Shields & Seal Types Radial Shielded, Unflanged Radial & Axial Play, Raceway Curvature, Contact Angle Radial Shielded, Flanged Lubrication Full Complement Radial Open, Unflanged & Flanged Preload & Duplex Ball Bearings Full Complement Radial Shielded, Unflanged & Flanged Load Ratings & Bearing Life Extended Inner Ring Radial Open, Unflanged & Flanged Nomographs Extended Inner Ring Radial Shielded, Unflanged & Flanged Mounting & Coding Modified Dimension Radial Open, Unflanged & Flanged Torque Modified Dimensions Radial Shielded, Unflanged & Flanged Tolerances Tapered O.D. Radial Shielded, Flanged Dimension Control Hi-Speed Specialty Ball Bearings Post Service Analysis Angular Contact Metric Conversion Table Radial Metric Series Ball Bearings, Radial Design Metric "L" Radial Open, Unflanged & Flanged Metric "L" Radial Shielded, Unflanged & Flanged Metric"R" Radial Open, Unflanged & Flanged Metric "R" Radial Shielded, Unflanged & Flanged