Deep Groove Ball Bearings SKF 6306 -Z/C3

The SKF 6306-Z/C3 deep-groove ball bearing, with dimensions of 30x72x19 mm and a C3 clearance, offers stable operation under thermal loads.

This single-row deep-groove ball bearing 6306 -Z/C3 accommodates radial forces as well as axial loads in both directions. Manufactured from standard rolling bearing steel 100Cr6, the bearing is characterised by high dimensional stability. A sheet steel cage guides the rolling elements evenly along the raceways. Thanks to the single-sided sheet metal cover, the design protects the interior of the bearing from coarse particles, whilst the open opposite side allows targeted lubricant access into the housing.

In which applications is the 6306-Z/C3 deep groove ball bearing with cover plate required?

Designs with single-sided lubricant supply primarily use this version in housings and drive trains where one side is within the lubrication zone. The single-sided Z cover plate keeps foreign particles away from the exposed side. Thanks to its manufacture to standard tolerance P0, the bearing fits precisely into bearing seats. Typical applications include general mechanical engineering and bearing arrangements operating at medium to high speeds.

What is the function of the increased C3 bearing clearance in the 6306-Z/C3?

The suffix C3 indicates an increased radial bearing clearance compared with the standard version. This feature reduces the risk of the bearing seizing up if operational heating causes thermal expansion of the shaft or inner ring. Even with tight fits, sufficient radial clearance is maintained to ensure smooth running. At operating temperatures between –20 and +150 degrees, this design protects against premature wear caused by thermal constraints.