INA thin section ball bearings

INA thin section bearings with an extremely small cross-section for light weight designs with reduced design envelope.

INA thin section bearings are high precision products with very little running noise and very high load carrying capacity. These ball bearings are available in three different designs with an extremely small, predominantly square cross-section. Within each series, the cross-section remains constant even in the case of larger shaft and housing bore diameters. The bearings are therefore also described as Constant Section (CS) bearings. This feature distinguishes thin section bearings from the conventional bearings that are described in standardised ISO series. In this way, a larger cross-section can be selected in a graduated way and thus a bearing with higher load carrying capacity can be used without the need to change the shaft diameter. Thin section bearings can thus be used to achieve extremely light and compact designs.

Available open or sealed, with cages made from brass or plastic

INA thin section bearings are available in designs that are either open or sealed on both sides. The seals are made from synthetic rubber (NBR) and have a steel insert. Sealed bearings are greased. For extreme operating conditions, special lubricants are available. Cages are made from brass or plastic.

Tolerance classes

In addition to the standard tolerance class PL1, the classes PL3 and PL6 are available (with increasingly narrow tolerances).

Fa = axial load
Fr = radial load
a = nominal contact angle
1 Deep groove ball bearing
2 Four point contact bearing
3 Angular contact ball bearing

Each of the designs is available in various series. The series correspond to the cross-section sizes. The balls are matched to the series.

Deep groove ball bearingsINA Thin section Ball Bearings, Type C

Suitable for radial and axial loads
Deep groove ball bearings (type C) can support axial loads in both directions as well as radial loads; under axial load, a contact angle (a > 0°) is adopted.

Four point contact bearingsINA Thin section Ball Bearings, Type X

Four point contact bearings (type X) can support axial loads in both directions as well as radial loads. As a result, they act in the same way as double row angular contact ball bearings.

Angular contact ball bearingsINA Thin section Ball Bearings, Type E

Angular contact ball bearings (type E) can be filled with an increased number of balls and have a nominal contact angle of a = 30°. They can support considerably higher radial loads than deep groove ball bearings or four point contact bearings and can support axial loads in one direction. For particular requirements, angular contact ball bearings are also available as matched pairs of bearings. These combinations then have a significantly higher rigidity and load carrying capacity than individual bearing solutions.

INA thin section bearing identification