Page 516 - Rollingbearings

Designation system

6 Cylindrical roller bearings

Designation system

Group 1 Group 2 Group 3 /

Preixes
L Separate inner or outer ring of a separable bearing
R Inner or outer ring with roller and cage assembly of a separable bearing

Basic designation

Listed in table 4, page 30
CRL Inch bearing
CRM Inch bearing
HJ Angle ring

Sufixes
Group 1: Internal design
A Deviating or modiied internal design
6 CV Modiied internal design, full complement roller set
EC Optimized internal design incorporating more and/or larger rollers and with modiied roller end / lange contact

Group 2: External design (seals, snap ring groove, etc.)
ADB Modiied internal design and seal (for NNF 50 series)
B Improved seal and grease
DA Modiied internal design and seal (for 3194‥ series)
K Tapered bore, taper 1:12
N Snap ring groove in the outer ring
NR Snap ring groove in the outer ring, with associated snap ring
N1 One locating slot (notch) in one outer ring side face
N2 Two locating slots (notches) in one outer ring side face, 180° apart
-2LS Contact seal, PUR, on both sides

Group 3: Cage design
FR Pin-type steel cage, pierced rollers
J Stamped steel cage, roller centred
JA Sheet steel cage, outer ring centred
JB Sheet steel cage, inner ring centred
L Machined light alloy cage, roller centred
LA Machined light alloy cage, outer ring centred
LB Machined light alloy cage, inner ring centred
LL Machined light alloy cage, window-type, inner or outer ring centred (depending on bearing design)
M Machined brass cage, roller centred
MA(S) Machined brass cage, outer ring centred. The S indicates a lubrication groove in the guiding surface.
MB Machined brass cage, inner ring centred
MH Machined brass cage, inner ring raceway centred
ML Machined brass cage, window-type, inner or outer ring centred (depending on bearing design)
MP Machined brass cage, window-type, inner or outer ring centred (depending on bearing size)
MR Machined brass cage, window-type, roller centred
P Glass ibre reinforced PA66 cage, roller centred
PA Glass ibre reinforced PA66 cage, outer ring centred
PH Glass ibre reinforced PEEK cage, roller centred
PHA Glass ibre reinforced PEEK cage, outer ring centred
V Full complement of rollers (no cage)
VH Full complement of rollers (no cage), self-retaining

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