Deep Groove Ball Bearings SKF 6303 /C3

The SKF 6303 /C3 deep groove ball bearing, with a 17 mm bore and increased C3 clearance, offers reliable operation under thermal stress.

The 6303 /C3 deep groove ball bearing is a single-row radial rolling bearing from SKF with standardised main dimensions of 17 mm inner diameter and 47 mm outer diameter, with a width of 14 mm. Thanks to its one-piece design, this bearing accommodates radial loads as well as moderate axial loads in both directions. Manufactured from standard roller bearing steel 100Cr6 and fitted with a guided sheet steel cage, the open ball bearing covers an operating temperature range from –20 to +150 degrees.

What operating conditions does the open deep-groove ball bearing 6303 /C3 require?

This design is primarily used in bearing arrangements where radial and axial loads occur under significant thermal stress. Without integrated sealing washers, the bearing operates with low frictional resistance and is designed for operation with oil or external grease lubrication. The open design requires a clean installation environment or a sealed housing to ensure that the lubricant remains within the system and that dirt particles are kept away from the raceways.

When is the increased radial clearance C3 required?

The suffix C3 indicates a slightly increased radial clearance compared with the standard version. This reserve serves to compensate for dimensional constrictions where tight fits on the shaft or in the housing cause the inner ring to expand or the outer ring to contract. Under operating conditions involving increased heat generation, the increased radial clearance prevents the rolling elements from seizing up. In tolerance class P0 or ABEC 1, the necessary smooth running is maintained during operation.