Deep Groove Ball Bearings SKF 6309 -2Z/C3

The SKF 6309 -2Z/C3 deep-groove ball bearing, with dimensions of 45x100x25 mm, a non-contacting 2Z sheet metal cover and C3 clearance, offers reliable operation under demanding radial loads.

The single-row deep-groove ball bearing 6309 -2Z/C3 primarily accommodates radial loads as well as moderate axial forces in both directions. Manufactured from standard roller bearing steel (100Cr6) with a cylindrical bore and a robust sheet steel cage, this design complies with tolerance class P0 (PN or ABEC 1). Metal shields on both sides protect the bearing interior from coarse particles. Thanks to the factory-applied grease fill, the unit is designed for an operating temperature range of -20 to +120 degrees Celsius.

For which operating conditions is the 6309 -2Z/C3 deep groove ball bearing suitable?

The 6309 -2Z/C3 deep groove ball bearing is designed for bearing arrangements involving continuous rotational speeds and radial loads. This design has proven its worth in industrial drives and shaft mountings where low friction and straightforward handling are required. Thanks to the smooth outer ring without a flange or groove, the rolling bearing can be fitted directly into machined cylindrical housing bores. The single-row design ensures low-friction guidance of the shaft with low torque resistance.

What is the function of the C3 bearing clearance and the 2Z cover plates?

The increased C3 radial clearance exceeds the standard dimension. This helps to prevent the rolling elements from becoming jammed when operational heating or tight fits cause thermal expansion of the shaft and inner ring. The 2Z cover plates on both sides, made of sheet steel, act as non-contact gap seals. They retain the grease inside and repel foreign particles without causing friction losses or additional heat generation at the sealing points.