Page 406 - Rollingbearings

Designation system

3 Angular contact ball bearings

Designation system

Group 1 Group 2 Group 3 /

3 Preixes

Basic designation
Listed in table 4, page 30
ALS Inch bearing
AMS Inch bearing

Sufixes
Group 1: Internal design
A Single row bearing, 30° contact angle
A Double row bearing, no illing slots
AB Single row inch bearing, 20° contact angle
AC Single row bearing, 25° contact angle
B Single row bearing, 40° contact angle
D Two-piece inner ring
E Optimized internal design

Group 2: External design (seals, snap ring groove, execution, etc.)
N Snap ring groove in the outer ring
NR Snap ring groove in the outer ring, with appropriate 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
CB Double row bearing, controlled axial internal clearance
CA Bearing for universal matching Two bearings arranged back-to-back or face-to-face
have axial internal clearance smaller than Normal (CB)
CB Bearing for universal matching Two bearings arranged back-to-back or face-to-face
have Normal axial internal clearance
CC Bearing for universal matching Two bearings arranged back-to-back or face-to-face
have axial internal clearance greater than Normal (CB)
G Bearing for universal matching Two bearings arranged back-to-back or face-to-face
have axial internal clearance
GA Bearing for universal matching Two bearings arranged back-to-back or face-to-face
have light preload
GB Bearing for universal matching Two bearings arranged back-to-back or face-to-face
have moderate preload
GC Bearing for universal matching Two bearings arranged back-to-back or face-to-face
have heavy preload
-2RS1 Contact seal, NBR, on both sides
-2RZ Non-contact seal, NBR, on both sides
-2Z Shield on both sides

Group 3: Cage design
– Stamped steel cage, ball centred (double row bearing)
F Machined steel cage, ball centred
FA Machined steel cage, outer ring centred
J Stamped steel cage, ball centred (single row bearing)
J1 Stamped steel cage, ball centred (double row bearing with a two-piece inner ring)
M Machined brass cage, ball centred; different designs are identiied by a number following
the M, e g M2
MA Machined brass cage, outer ring centred
MB Machined brass cage, inner ring centred
P Glass ibre reinforced PA66 cage, ball centred
PH Glass ibre reinforced PEEK cage, ball centred
PHAS Glass ibre reinforced PEEK cage, with lubrication grooves in the guiding surfaces, outer
ring centred
TN9 Glass ibre reinforced PA66 cage, ball centred
Y Stamped brass cage, ball centred

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