Deep Groove Ball Bearings SKF 623 -2Z

The SKF 623-2Z deep groove ball bearing, with a 3 mm bore and cover plates on both sides, offers low-friction protection for compact shaft mountings.

The 623-2Z deep groove ball bearing is a single-row miniature rolling bearing from SKF designed for shaft diameters of 3 mm. With an outside diameter of 10 mm and a width of 4 mm, the component primarily withstands radial loads, but also handles small axial forces in both directions. The outer ring, inner ring and rolling elements are made of standard roller bearing steel (100Cr6). Manufacture to standard tolerance class P0 (ABEC 1) ensures the dimensional accuracy required in commercial machinery and equipment manufacturing.

In which installation situations does the 623-2Z miniature bearing prove its worth?

Designs with very limited installation space represent the typical field of application for the 623-2Z deep groove ball bearing. Typical applications include the guidance of small shafts and axles where dirt particles need to be kept away from the raceways. The version with non-contacting cover plates is suitable for operating temperatures ranging from –20 to +120 degrees Celsius under normal industrial environmental conditions.

What protection do the cover plates on the -2Z variant offer?

The suffix -2Z denotes cover plates made of sheet steel fitted on both sides. Unlike abrasive rubber seals, these gap seals do not come into contact with the inner ring. This keeps frictional resistance low, enabling higher speeds without additional heating. The shields keep coarse dust and foreign particles out of the bearing interior. In combination with the standard radial bearing clearance and the guided sheet steel cage, the bearing is designed for applications where standard fits are used without excessive thermal expansion.