Deep Groove Ball Bearings FAG 634 -2Z

The FAG 634-2Z deep-groove ball bearing combines compact dimensions of 4 × 16 × 5 mm with cover plates on both sides for protected miniature bearings.

The 634-2Z deep groove ball bearing is designed as a single-row miniature bearing for applications with very limited installation space. With an inner diameter of 4 mm, an outer diameter of 16 mm and a width of 5 mm, the design is primarily suited to radial loads and low axial forces. The inner ring, outer ring and rolling elements are manufactured from standard rolling-bearing steel 100Cr6; together with the guided sheet-steel cage, this forms the basis for smooth ball rotation within the bearing.

In which applications is the 634-2Z deep-groove ball bearing used?

Small bearing locations in mechanical engineering and equipment manufacturing place high demands on fitting accuracy whilst requiring minimal space. The 634-2Z deep groove ball bearing operates within a temperature range of –30 to +120 degrees Celsius and is therefore suitable for varying thermal conditions in enclosed assemblies. As the outer ring has no flange or circumferential groove, the bearing unit can be integrated flush into cylindrical mounting bores.

What is the function of the 2Z cover plates in this miniature bearing?

The suffix 2Z indicates covers on both sides made of profiled sheet steel, which act as non-contact gap seals. These cover plates keep coarse dust and foreign particles away from the raceways without altering the starting torque due to friction on rotating surfaces. Together with tolerance class P0 or ABEC 1 and the standard radial bearing clearance, the bearing supports low-vibration operation in precision mechanical mountings.