Tapered roller bearings comprise solid inner and outer rings with tapered raceways and tapered rollers in a window cage.

The bearings are in the form of:

• standard designs
• open variants matched in pairs
• integral designs sealed on one side, JK0S.

Open bearings are not self-retaining. As a result, the inner ring with the rollers and the cage can be fitted separately from the outer ring.

Metric and inch size bearings are available. Designs with a K in the designation have inch dimensions. For new designs, however, bearings in metric sizes should always be used in preference.

Tapered roller bearings of series T7FC are supplied in X-life design. These bearings have improved surfaces, a higher performance combination of material and heat treatment as well as an optimised contact geometry. This improves the friction behaviour and increases the basic dynamic load rating. Under the same operating conditions, a significant increase in basic rating life is achieved. For certain applications, this means that a smaller bearing arrangement can be designed.

X-life bearings are indicated in the dimension tables.

Tapered roller bearings can support axial loads in one direction and high radial loads.

They must normally be axially adjusted against a second bearing fitted in a mirror image arrangement. This bearing combination is fitted in an O or X arrangement, Figure and Figure .

The axial load carrying capacity is dependent on the contact angle; i.e. the larger the angle, the higher the load to which the bearing can be subjected.

The size of the contact angle and thus the load carrying capacity is indicated by the bearing-specific value e in the dimension tables. Bearings of series 313, 323..-B, T5ED and T7FC have a very high axial load carrying capacity due to their particularly large contact angle.

The modified line contact between the tapered rollers and the raceways ensures optimum stress distribution at the contact points, prevents edge stresses and allows the bearings to undergo angular adjustment.

At a load ratio P/C_r ≦ 0,2, the tilting of the bearing rings relative to each other must not exceed a maximum of 4 angular minutes. For higher loads or tilting angles, please contact us.

Tapered roller bearings with the suffix N11CA are matched in pairs in an X arrangement and can therefore support high axial forces in both directions and moment loads.

The axial internal clearance of the bearing pair is defined by a ring between the two outer rings and is indicated in the suffix, see section link.

We can also supply tapered roller bearings by agreement as matched pairs in an O arrangement (N11CB).

When ordering, the number of bearings must be stated, not the number of bearing pairs.

Tapered roller bearings of series JK0S are ready-to-fit units sealed on one side and are predominantly fitted in pairs in an O arrangement. They are not separable and do not require regreasing.

There is no need to set the axial internal clearance of the bearing pair. It is the result of the very narrowly toleranced projection (dimension u) between the inner and outer ring when the inner rings are clamped using a shaft nut or shaft end cover.

In order to achieve the correct axial internal clearance after fitting, the inner and outer rings have a tight fit.

In the case of integral tapered roller bearings fitted in pairs in an O arrangement, a suitable slot is formed on the outer ring for the snap ring BR. The snap ring must be ordered separately.

Tapered roller bearings of standard design and matched in pairs are not sealed.

Integral tapered roller bearings JK0S have a lip seal on one side.

Tapered roller bearings of standard design and matched in pairs can be lubricated with oil or grease.

Integral tapered roller bearings JK0S are filled with a high quality grease.

Open tapered roller bearings can be used at operating temperatures from –30 °C to +120 °C. For continuous operating temperatures above +120 °C, please contact us.

Bearings with a lip seal can be used at operating temperatures from –30 °C to +110 °C, restricted by the grease and sealing ring material.

Open tapered roller bearings have sheet steel cages.

Integral bearings JK0S have cages made from glass fibre reinforced polyamide 66.

Suffixes for available designs: see table.