Angular Contact Ball B. FAG 3318 -C3

The FAG 3318-C3 angular contact ball bearing is a double-row rolling bearing with a 90 mm bore, an outer diameter of 190 mm and an increased C3 clearance.

The FAG 3318-C3 angular contact ball bearing accommodates high radial forces as well as axial forces on both sides simultaneously. Thanks to its double-row design made from standard roller bearing steel (100Cr6), the construction offers a compact unit compared to two paired single bearings. Manufactured to tolerance class P0 (ABEC 1) and guided by a robust sheet steel cage, this rolling bearing – which has no integrated seals – is primarily used where external lubrication or an oil bath is provided.

What is the 3318-C3 double-row angular contact ball bearing suitable for?

Typical applications include bearing arrangements subject to combined radial and axial loads in general mechanical engineering, as well as designs with increased thermal requirements. As the bearing transmits loads in both axial directions, it provides stable guidance for the shaft against axial displacement. The operating temperature range of –20 to +150 degrees covers a wide range of thermal conditions. As it is an open bearing without a flange or groove on the outer ring, it can be fitted directly into housing bores and lubricated externally.

What does the C3 bearing clearance mean for the 3318-C3 angular contact ball bearing?

The suffix ‘C3’ indicates increased radial clearance compared with the standard version. This internal clearance serves to compensate for operational temperature differences between the shaft and the housing, as well as for fit allowances during installation, without causing undesirable stresses. During design, care must be taken to ensure that the lubricant is suitable for the open design and the operating temperatures. For maintenance and relubrication, a clean environment is recommended to prevent dirt particles from entering the unsealed interior of the bearing.