Deep Groove Ball Bearings SKF 6306 -2Z

The SKF 6306-2Z deep-groove ball bearing, with a 30 mm bore and sheet metal shields on both sides, offers robust protection against dirt particles at high speeds.

This single-row 6306-2Z deep-groove ball bearing from SKF in the Explorer series is made from standard 100Cr6 rolling-element bearing steel. It primarily withstands radial loads and can also guide the shaft in both axial directions. A sheet steel cage guides the rolling elements evenly into the deep raceways of the rings. With main dimensions of 30 mm inner diameter, 72 mm outer diameter and 19 mm width, the design meets standardised industrial requirements in general mechanical engineering.

Under what conditions is the 6306-2Z deep-groove ball bearing suitable?

This design is particularly suitable for rotating applications involving uniform rotational movement and continuous radial loading. The non-contact gap seal between the two end shields prevents any additional friction during operation, meaning that the permissible speed limits correspond to those of open bearings. The component remains fully operational within the specified temperature range of -20 to +120 degrees. The environment should be free from direct exposure to liquids, such as splashing water or persistent mist.

What are the benefits of the 2Z cover plates and standard bearing clearance?

The metallic cover plates (designation -2Z or ZZ) shield the interior of the bearing from solid dirt particles and keep the factory-applied grease within the operational range. The design with standard radial bearing clearance is optimised for standard shaft and housing fits, as well as balanced operating temperatures. It serves to minimise radial play during operation. Where there are significant temperature differences between the inner and outer rings, a version with increased bearing clearance is recommended.