Deep Groove Ball Bearings SKF 6304 /C3

The SKF 6304/C3 deep groove ball bearing, with a 20 mm bore, 52 mm outer diameter and 15 mm width, offers increased radial clearance for thermally demanding drives.

The 6304 /C3 deep groove ball bearing is a single-row rolling bearing manufactured by SKF. This version has a bore of 20 mm, an outer diameter of 52 mm and a width of 15 mm. Manufactured from standard rolling-bearing steel 100Cr6, this open bearing supports radial loads and also accommodates axial forces in both directions. A sturdy sheet steel cage maintains an even spacing between the rolling elements. As it does not feature integrated sealing washers, the design is particularly suitable for oil- or grease-lubricated environments with external sealing.

What is the 6304 /C3 deep groove ball bearing suitable for?

This single-row radial ball bearing is primarily used in rotating components where significant operating heat or tight fits occur. As the bearing is designed without abrasive sealing washers, it starts up with low friction and can be integrated directly into existing lubrication circuits. The permissible temperature range of –20 to +150 degrees Celsius allows operation under demanding thermal conditions in industrial bearing arrangements.

What does the C3 clearance rating mean for this rolling bearing?

The suffix /C3 indicates a slightly increased radial clearance compared with the standard version. This increased clearance compensates for thermal expansion when the inner ring becomes warmer than the outer ring during operation. Furthermore, the clearance prevents the rolling elements from becoming jammed in the event of tight press fits on the shaft. The bearing complies with tolerance class P0/PN or ABEC 1 and has a cylindrical outer ring without a flange or ring groove, which facilitates installation in standardised housing bores.