Designation system Examples and the applicable options for SKF deep groove ball bearings are given  The above letters are also used together with the clearance classes C2, C3, Internal clearance Bearing internal clearance (fig. 1) is defined as the  Sufficient internal clearance in a bearing during operation is important. Preload  Greater than C3. Group 5 
Deep groove ball bearings - 6230 d, 150, mm. D, 270, mm. B, 45, mm. d1, ≈, 190.6, mm. D1, ≈, 227.35, mm. r1,2, min. 3, mm. Abutment dimensions. da, min. 164, mm. Da, max. 256, mm. ra, maxBearing data Normal, C3 Check availability of C2, C4 or C5 clearance classes. Bearings for vibratory applications: C4 Bearings for high-speed applications: C4Rolling bearings Greater than C3. Group 5. C5. Greater than C4. Hardening. There are three typical hardening methods that may be applied to bearing components: • Through- Deep Groove Ball Bearings | Bearings, Units & Housings | SKFDeep groove ball bearings are particularly versatile. They are suitable for high and very high speeds, accommodate radial and axial loads in both directions and