RKB Europe SA · Founded 1936 · Balerna, Switzerland
RKB Bearing Industries Group has manufactured industrial bearings in Switzerland since 1936, from 1 mm bore diameter to over 2,000 mm outer diameter, serving over 70 countries worldwide.
Single row ball bearings (open, sealed or shielded) with optimized internal geometry, for high speeds, heavy loads and low noise.
M
Machined brass cage guided on the balls, for very high operating speeds. Available with MB/MA cage guidance, lubrication grooves (S), or a locating slot for axial location (N1).
J
High-strength pressed steel cage guided on the balls, for high operating speeds. Available with a snap ring groove for axial location (N).
TN
Moulded glass fiber reinforced polyamide snap-in cage, for very high accelerations and operating speeds.
ZZ
Two non-contacting steel shields, supplied grease-filled for maintenance-free operation without compromising limiting speed.
2RS
Two contacting rubber seals, supplied grease-filled for maintenance-free operation with enhanced contaminant exclusion.
Angular Contact Ball Bearings
Used where combined loads, high speeds and runout accuracy are required. Single row types can be paired face-to-face (DF) or back-to-back (DB).
M
Single non-universal execution with a machined brass cage, for very high operating speeds, with 25°, 30° or 40° contact angles.
QJ
Split inner ring, supports axial loads only, with two locating slots (N2). Also available as one-piece inner / two-piece outer ring (Q).
DB
Back-to-back paired arrangement, preset or adjusted BEP, giving a stiffer mount that withstands tilting moments.
DF
Face-to-face paired arrangement, preset or adjusted BEP, with optional lubricated inner/outer spacers.
DFM
Non-separable double row, open face-to-face design, supporting high combined loads.
Engineered to withstand high radial forces and moderate axial forces in both directions, dynamically accommodating shaft misalignment.
Main Designs
MA
For medium/large bearings, symmetrical roller profile, two-piece brass cage guided on the outer ring.
MB
For medium bearings at medium-high speeds with high load capacity, two-piece brass cage guided on the inner ring.
CA
For large bearings withstanding high radial and moderate axial loads, one-piece double-pronged brass or steel cage.
CC
Ribless inner ring for medium bearings at medium-high speeds, two-piece pressed steel window-type cage.
ECA
Large-size version of the CA design with an optimized roller set for increased load capacity.
Special Designs
SEALED
Integral rubber seals on both sides (2CZ) for harsh working conditions, medium/large bearings at medium speeds.
ROVSX
Designed for vibratory equipment, with higher-than-normal radial internal clearance and running accuracy.
WOR
For the gear output shaft of truck concrete mixers, wider outer ring, greater permissible misalignment.
SPLIT
Engineered for hard-to-reach positions (e.g. bucket wheel excavators), facilitating mounting, dismounting and maintenance.
ECCS
Ribless inner ring for small/medium bearings, cage with a slotted open face to improve lubricant flow, suitable for harsh environments.
Cylindrical Roller Bearings
For heavy radial loads and medium speeds, with the highest load rating capacities and improved internal geometry.
Single Row
NU
Outer ring with two integral ribs, ribless inner ring, for non-locating position.
N
Ribless outer ring, inner ring with two integral ribs, for non-locating position.
NUP
Outer ring with two integral ribs, inner ring with one integral and one loose rib, can be used in locating position.
NJ
Outer ring with two integral ribs, inner ring with one integral rib, one-direction locating position.
NJG
Full complement (cageless) separable design for increased load capacity, one-direction locating position.
NJGL
Circumferentially split outer ring, lamellar brass cage, maintains high carrying capacity without compromising speed.
NCF
Full complement (cageless) design for increased load capacity, one-direction locating position.
Double Row
NNU
Outer ring with three integral ribs, ribless inner ring, available with cylindrical or tapered bore.
NN
Ribless outer ring, inner ring with three integral ribs, available with cylindrical or tapered bore.
SL01
(NNC-C) Split outer ring clamped with a retaining ring, full complement design, can be used in locating position.
SL02
(NNCL-C) Ribless outer ring, full complement design with a separating ring between the two roller rows.
SL04
(NNF) Full complement design, integrated rubber seals on both sides to avoid contamination, supplied filled with grease.
SL18
(NNCF) Full complement design, one-direction locating position, available with lubrication holes.
Multi Row
AF2D
For small/medium bearings, double-pronged high-strength steel cage for corrosion resistance.
GB2DX
For rolling mill stands with automatic roll-changing devices, long-short roller arrangement for better load distribution.
F2CII/EVO
For large bearings, pierced-roller design for increased carrying capacity.
D2CII
For medium/large bearings, designed to facilitate mounting and dismounting.
Q2ACEVO
For large bearings with an increased inner ring shoulder for seal seating.
Tapered Roller Bearings
Engineered to withstand combined radial and thrust loads, in metric or inch measurements, single row, matched pair, double and four-row configurations.
Single Row
TRB-TS
Separable design, one-piece pressed steel cage, supports radial and axial loads in one direction, suitable for medium-high speeds.
TRB-DB
Matched set in back-to-back arrangement, high stiffness, reduced angular misalignment, preset or adjusted BEP.
TRB-DF
Matched set in face-to-face arrangement, lower stiffness, increased angular misalignment tolerance, preset or adjusted BEP.
Double Row
TDO
One double cup, two single cones with a spacer between them, high stiffness, reduced angular misalignment.
TDONASW
One double cup, two single cones, executed without a spacer, with lateral shields or seals for contaminant exclusion.
TDI
Two single cups, one double cone with a spacer between the cups.
TDIS
Two single cups, one double cone, increased contact angle for high axial load capacity.
TDISS
Two single cups, one double cone, lateral seals for contaminant exclusion, increased contact angle.
Four-Row
TQO
Three ribless outer rings plus two cup spacers, two inner rings plus a cone spacer, supports radial and axial loads in both directions.
TQO-NOSPACER/G
Three ribless outer rings, two inner rings, executed without spacers, lubrication grooves in the double cone side faces.
TQO-PIERCED/G
Pierced-roller execution to increase load capacity, four two-piece steel pin type cages.
TQOS/AVS2/G
Lateral flanges with lip seals and o-rings on both sides, Anti-Vortex System cone spacer seal set.
TQIT
Two double-cup outer rings plus a spacer, three inner rings, available with cylindrical (TQI) or tapered bore (TQIT).
Thrust Bearings
Designed to support high axial loads and, in some cases, moderate radial loads, with flat or spherical housing locating washers.
Single Direction
51M
Flat housing locating washer, separable design, machined brass cage guided on the balls.
EM
Asymmetrical roller profile, reinforced and optimized execution, supports axial loads and angular misalignment.
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