Deep Groove Ball Bearings SKF 6306 -2Z/C3

The SKF 6306 -2Z/C3 deep groove ball bearing combines dimensions of 30x72x19 mm with non-contact end shields and a slightly increased C3 bearing clearance.

The SKF 6306 -2Z/C3 single-row deep groove ball bearing accommodates radial loads as well as moderate axial forces in both directions. Manufactured from standard 100Cr6 rolling-element bearing steel and classified in tolerance class P0, this rolling bearing provides a solid foundation for industrial drives. The sheet-metal end shields on both sides keep dirt particles out of the bearing interior, whilst the increased bearing clearance compensates for thermal expansion during operation. With a 30 mm bore, 72 mm outer diameter and 19 mm width, the bearing fits into numerous standardised housings.

Under what operating conditions is the 6306-2Z/C3 deep-groove ball bearing used?

This design is suitable for bearing arrangements subject to radial and moderate axial loads, where operational heating occurs or tight fits reduce the radial bearing clearance. As the non-contacting 2Z cover plates do not make frictional contact with the inner ring, the rolling bearing rotates with low resistance even at higher speeds. This design is recommended where basic protection against dirt particles is required within a temperature range of -20 to +120 degrees. The integrated sheet steel cage maintains a precise spacing between the rolling elements.

What are the distinctive features of the C3 bearing clearance and the 2Z cover?

The C3 designation indicates a slightly increased radial bearing clearance compared with the standard version. This increased clearance serves to prevent the rolling elements from becoming jammed should the shaft expand more than the surrounding housing during operation. The cover plates on both sides protect the interior from solid particles without generating any additional frictional torque. When designing the application, it must be borne in mind that the outer ring has no groove or flange and that the bearing has no electrical insulation.