Deep Groove Ball Bearings SKF 6303 -Z/C3

The SKF 6303 -Z/C3 deep-groove ball bearing, with dimensions of 17x47x14 mm, a single-sided Z-end cap and increased C3 clearance, is designed for applications subject to thermal stress.

This single-row deep-groove ball bearing 6303 -Z/C3 primarily supports radial loads and guides shafts in the housing. Manufactured from standard rolling-element bearing steel 100Cr6, this design features a robust sheet steel cage and a cylindrical outer ring without a flange or groove. With this design, SKF covers a temperature range from –20 to +150 degrees Celsius, opening up a wide range of applications in industrial environments.

In which installation situations does the 6303 -Z/C3 deep groove ball bearing prove its worth?

It is primarily used in applications where operational heat build-up occurs during operation or where tight fits are required. The single-sided sheet metal cover shields the interior from coarse dirt particles, whilst the open opposite side allows for targeted relubrication via the housing cavity where required. From a design perspective, this combination is preferred where a housing wall already serves as protection and where friction losses caused by contacting seals are to be avoided.

What does the C3 bearing clearance mean for bearing 6303 -Z/C3?

The suffix ‘C3’ indicates a slightly increased radial bearing clearance as supplied. This reserve helps to ensure that the radial clearance does not narrow to an impermissible extent due to thermal expansion of the shaft or the press-fitting of the bearing rings. Together with the standard tolerance according to tolerance class P0 (ABEC 1), this feature promotes smooth running. The mounting dimensions of 17 mm bore diameter, 47 mm outer diameter and 14 mm width are decisive for the design.