Deep Groove Ball Bearings FAG 6218 -2Z-C3

FAG deep groove ball bearing 6218 -2Z-C3 with a 90 mm bore, non-contacting end shields and increased C3 bearing clearance for industrial use.

The 6218 -2Z-C3 deep groove ball bearing is a single-row radial rolling bearing made from standard bearing steel (100Cr6) with main dimensions of 90 x 160 x 30 mm. This version features sheet metal cover plates on both sides and a slightly increased radial clearance (C3). The design primarily absorbs radial forces, is suitable for axial guidance in both directions and is rated for operating temperatures ranging from -30 to +120 degrees.

In which installation scenarios does the 6218-2Z-C3 deep-groove ball bearing prove its worth?

Design engineers use this bearing for shaft diameters of 90 mm, particularly in industrial drives and rotating assemblies subject to moderate levels of contamination. Thanks to the gap seals on both sides, the lubricant remains within the bearing chamber, whilst the ingress of larger contaminants is impeded. As the cover plates operate without contact, no additional friction losses occur, which facilitates operation at higher speeds.

What is the function of the C3 bearing clearance and the sheet steel cage?

The C3 classification provides greater radial clearance than the standard tolerance class (P0/PN or ABEC 1). This increased bearing clearance helps to prevent the rolling elements from jamming when temperature differences between the inner and outer rings or tight fits lead to radial constriction. The cylindrical outer ring is manufactured without a flange or groove. A robust sheet steel cage guides the ball列 evenly into the deep raceways and ensures smooth running.