Cylindrical roller bearings with a disc cage (series LSL) or with spacers (series ZSL) are of a single row, self-retaining design and correspond to dimension series 23. They have solid outer rings with two ribs, while the inner rings have one rib. The inner ring is removable and thus allows easier mounting of the bearings. The disc cages or spacers prevent the cylindrical rollers from coming into contact with each other during rolling.

Cylindrical roller bearings NJ23..-E and spherical roller bearings 223..-E1 have the same design envelope as LSL1923 and ZSL1923.

Numerous sizes are supplied in the X-life grade. These bearings are indicated in the dimension tables.

Bearings of X-life quality have, for example, lower roughness R_a and higher geometrical accuracy of the raceways than comparable designs that are not X-life. As a result, they have higher load carrying capacity and longer life for the same dimensioning. In certain applications, this means that a smaller bearing arrangement can be designed.

In the case of bearings of TB design, the axial load carrying capacity of cylindrical roller bearings was significantly improved with the aid of new calculation and manufacturing methods.

Optimum contact conditions between the roller and rib are ensured by means of a special curvature of the roller end faces. As a result, the axial contact pressures on the rib are significantly minimised and a lubricant film capable of supporting higher loads is formed. Under normal operating conditions, wear and fatigue at the rib contact running and roller end faces is completely eliminated.

In addition, axial frictional torque is reduced by up to 50%. The bearing temperature during operation is therefore significantly lower.

Cylindrical roller bearings LSL1923 and ZSL1923 are semi-locating bearings. Semi-locating bearings can support not only high radial forces but also axial forces in one direction and can therefore guide shafts axially in one direction. They act as non-locating bearings in the opposite direction.

The bearings have two ribs on the outer ring and one rib on the inner ring.

Due to the large number of rolling elements and their dimensions, LSL and ZSL bearings  have very high radial load carrying capacity. They can also withstand high shock loads and vibrations.

Due to the low frictional torque and the low level of heat generation, the bearings are characterised by high limiting speeds. In addition, the optimum heat dissipation ensures thermally stable conditions in the bearing.

In cylindrical roller bearings LSL1923, an externally-guided flat brass disc cage prevents the cylindrical rollers from coming into contact with each other during rolling.

The cage has pockets to accommodate the rolling elements. The rolling elements are guided between the ribs on the outer ring. Due to its low mass, the cage is subjected to only minimal strain under acceleration.

The outer ring is axially split and held together by fasteners.

In cylindrical roller bearings ZSL1923, plastic spacers prevent the cylindrical rollers from coming into contact with each other during rolling. The spacers are designed such that the rolling element set is self-retaining, so the bearing and inner ring can be mounted separately.

The spacers are guided axially between the two outer ring ribs.

The outer and inner ring can be axially displaced relative to each other in one direction only by the dimension “s” stated in the dimension table.

The cylindrical roller bearings are open on both sides.

They can be lubricated via the end faces with grease or oil.

In addition to high basic dynamic load ratings and thus long rating life values, bearings in vibratory machinery must also be able to compensate or support considerable shaft tilting due to load or misalignment. The bearings LSL and ZSL are therefore also available by agreement in the BIR design. In these bearings, the inner ring raceway is ground slightly spherical.

Cylindrical roller bearings with disc cage or spacers are suitable for operating temperatures from –30 °C to +120 °C.

Suffixes for available designs: see table.