Suffixes for Four-Point Contact Ball Bearings

Internal design Suffixes
N.a.

External design Suffixes
N2	Two locating slots (notches) in one outer ring side face, 180° apart

Cage design Suffixes
FA	Machined steel cage, outer ring centred
MA	Machined brass cage, outer ring centred.
PHAS	Glass fibre reinforced PEEK cage, with lubrication grooves in the guiding surface, outer ring centred

Materials, heat treatment Suffixes
N.a.

Accuracy, clearance, preload, quiet running Suffixes
P6	Dimensional and geometrical tolerances to class P6
P62	P6 + C2
P63	P6 + C3
P64	P6 + C4
P6CNL	P6 + CNL
CNL	Axial internal clearance in the lower half of the Normal range
C2	Axial internal clearance smaller than Normal
C2H	Axial internal clearance in the upper half of the C2 range
C2L	Axial internal clearance in the lower half of the C2 range
C3	Axial internal clearance greater than Normal
C4	Axial internal clearance greater than C3
344524	C2H + CNL

Bearing sets, matched bearings Suffixes
N.a.

Stabilization Suffixes
S1	Bearing rings heat stabilized for operating temperatures ≤ 200 °C (390 °F)

Lubrication Suffixes
N.a.

Other variants Suffixes
309829	Larger balls

suffix for Four-Point Contact Ball Bearings