In single row cylindrical roller bearings, the main dimensions are standardized according to ISO 15 (radial bearings - boundary dimensions), DIN 616 (roller bearings - boundary dimensions) or DIN 5412-1 (roller bearings - single row cylindrical roller bearings) .
Abutment ring (HJ) dimensions are standardized according to DIN 5412-1 and ISO 246 (Cylindrical roller bearings - Abutment rings).
By default, we produce single row cylindrical roller bearings with standard tolerances (PN) according to DIN 620-2 (Tolerances for roller bearings - Tolerances for radial bearings) and ISO 492 (Tolerances for radial bearings - Dimensions and tolerances). We also supply bearings with P6, P5 and P4 tolerances upon request.
AUB manufactures cylindrical roller bearings in design types NU.., NJ.., NUP.. and N. Cylindrical roller bearings and bearing assemblies, such as retaining rings (HJ), can also be delivered as special design types RNU, NUB, NJP, NU+HJ, NJ+HJ, as well as separate inner rings (L..), if appropriate , with shoulder loops LNJ, LNU, LNJP and LNUP.
The NU design consists of an outer ring with two shoulders and an inner ring without shoulders. Although NU bearings cannot accommodate axial forces, they provide length compensation inside the bearing and are in principle non-locating bearings. Bearings are removable. When used as a stepped bearing, it can be connected with a retaining ring HJ.
In the N design, the inner race has two shoulders and the outer race has no shoulders. N design bearings cannot withstand axial forces. However, they provide length compensation inside the bearing and are in principle floating bearings. Bearings are removable.
The NJ design consists of an outer ring with two shoulders and an inner ring with one shoulder. Due to this design, the bearing can withstand axial forces in one direction. It is possible to combine NJ support bearings with HJ abutment rings to obtain fixed bearings.
The NUP design consists of an outer ring with two shoulders, an inner ring with fixed shoulders and loose ribs. Bearings are used as fixed bearings to withstand alternating axial forces.
Bearing series: N2.., N3.., N4.., N10.., N22.., N23.., NJ2.., NJ3.., NJ4.., NJ10.., NJ22.., NJ23.. , NU2.., NU3.., NU4.., NU10.., NU22.., NU23.., NUP2.., NUP3.., NUP4.., NUP10.., NUP22.., NUP23..
According to DIN 620-4 (Roller bearing tolerances – Radial clearance) and ISO 5753-1 (Roller bearings – Clearance – Radial clearance), all cylindrical roller bearings manufactured by AUB are specified in clearance class CN deliver. Other bearing clearance classes or designs with special clearances are available on request. Bearing assemblies manufactured by AUB to DIN 5412-1 with the same clearance are interchangeable. Bearings with a specified radial clearance are generally not interchangeable.