Cylindrical Roller Bearings

The design of cylindrical roller bearings makes them very rigid and suitable for high radial loads. However, certain versions (NJ and NUP) are capable of absorbing axial loads under certain conditions. Cylindrical roller bearings are available in a wide variety of designs, with the overwhelming majority being single-row separable bearings with a cage. This form makes not only the assembly and disassembly of the bearings easier, but also their maintenance.

Multi-row (double and four-row) cylindrical roller bearings are particularly torsionally rigid and suitable for the highest radial stresses. They need a relatively small installation space and the large number of rolling elements enables very good force distribution.

Features

Cylindrical roller bearings up to bore Ø 1700 mm.

Designs of single-row cylindrical roller bearings:

  • N         Ein Inner ring with two ribs and one outer ring without ribs
  • NU      Ein Outer ring with two ribs and one inner ring without ribs
  • NJ       Ein Outer ring with two ribs and one inner ring with one rib
  • NUP    Ein Outer ring with two ribs, one inner ring with one fixed rib and a rib washer

Versions RNU, NUB, NJP, NU+HJ, NJ+HJ, LNJ, LNU, LNJP and LNUP are available on enquiry.

Designs of double-row cylindrical roller bearings:

  • NN30
  • NNU 40, 48 and 49

Designs of multi-row cylindrical roller bearings:

  • NNU60
  • NU60

Versions preferably with solid brass cages or steel cages.

Cylindrical roller bearings with particular current insulation can also be manufactured on request.

Cylindrical roller bearings in the standard version are manufactured with a normal bearing clearance (C0 or CN – no suffix added to the bearing designation). Bearings with a reduced or increased bearing clearance can also be manufactured on request.

  • C2       Radial internal clearance < CN *
  • C3       Radial internal clearance > CN *
  • C4       Radial internal clearance > C3 *

* These bearing clearance designations are added as suffixes to the bearing designation.

Cylindrical roller bearings are manufactured with the normal tolerances (P0) of the radial bearings. P0 is not indicated in the bearing designation.

Bearings can also be manufactured with a greater precision to meet particular requirements.

  • P6       Restricted tolerance *
  • P5       Restricted tolerance *
  • P4       Restricted tolerance *

* These tolerance classes are added as suffixes to the bearing designation.

In the standard version (S0) cylindrical roller bearings are heat treated so that they are generally dimensionally stable up to max + 150 °C. Special heat treatments are required for higher operating temperature requirements.

  • S1       Operating temperature max. + 200 °C *
  • S2       Operating temperature max. + 250 °C *
  • S3       Operating temperature max. + 300 °C *
  • S4       Operating temperature max. + 350 °C *

* These temperature classes are added as suffixes to the bearing designation.

Suffixes

EM      Solid brass cage in reinforced version for higher load ratings

M         Solid brass cage (rolling element riding)

MA      Solid brass cage (outer ring riding

M1       Solid brass cage, riveted (rolling element riding)

M1A    Solid brass cage, riveted (outer ring riding)

M2       Solid brass cage with hot-riveted steel rivets (rolling element riding)

M2A    Solid brass cage with hot-riveted steel rivets (outer ring riding)

M2B    Solid brass cage with hot-riveted steel rivets (inner ring riding)

MPA   Solid window-type brass cage (outer ring riding)

MPB   Solid window-type brass cage (inner ring riding)

ES       Steel cage in reinforced version for higher load ratings

P51     Tolerance class P5 and bearing clearance C1

K         Conical α = 1/12

NA      Non-exchangeable rings