Deep Groove Ball Bearings SKF 6321 /C3

The SKF 6321/C3 deep groove ball bearing, with dimensions of 105 × 225 × 49 mm and increased C3 clearance, provides precise shaft guidance under thermal loads.

The 6321 /C3 deep groove ball bearing is a single-row rolling bearing designed for high radial loads in mechanical drive systems. SKF manufactures this model from standard 100Cr6 bearing steel, ensuring that the raceways and balls retain their dimensional stability. As the bearing has an open design, lubricant reaches the contact zones between the rolling elements and the sheet steel cage directly. The size 105x225x49 mm is primarily designed to accommodate high radial forces as well as moderate axial forces in both directions.

What operating conditions does the 6321/C3 deep groove ball bearing require?

This single-row deep-groove ball bearing is designed for industrial applications where high radial forces and operational temperature differences between the shaft and housing occur. Thanks to its open design, the bearing can be flexibly integrated into on-site oil or grease lubrication systems. The design, which features no flange on the outer ring, allows for installation in through-bores in the housing, whilst external seals protect the raceways from environmental influences.

What does the C3 radial clearance mean for model 6321?

The suffix C3 indicates a slightly increased radial clearance compared with the standard version. This additional radial clearance is crucial when tight fits on the shaft or housing reduce the bearing clearance during installation. This clearance also effectively compensates for thermal expansion at operating temperatures of up to +150 degrees without the rolling elements becoming jammed. Before assembly, it must be checked whether the operating temperature and the selected bearing seats require this increased bearing clearance.