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Four-Point Contact Ball Bearings Designation system
The designations of most Lily rolling bearings follow a system that may consist of a basic designation with or without one or more prefixes and/or suffixes.
An example and the applicable options for four-point contact ball bearings are given below.
Examples
QJ 318 N2PHAS | where | QJ 318 = | |
N2 = | |||
PHAS = |
Applicable options
Prefixes (n.a.) | |
Basic designation | |
Listed in table 1 | |
Suffixes - Internal design (n.a.) | |
Suffixes - External design (seals, snap ring groove, etc.)) | |
N2 | Two locating slots (notches) in one outer ring side face, 180° apart |
Suffixes - Cage design | |
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 |
Suffixes - Materials, heat treatment (n.a.) | |
Suffixes - Accuracy, clearance, preload, quiet running | |
P6 | Dimensional and geometrical tolerances (tolerances of run-out) to class P6 |
P62 | P6 + C2 |
P63 | P6 + C3 |
P64 | P6 + C4 |
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 |
Suffixes - Bearing sets, matched bearings(n.a.) | |
Suffixes - Stabilization | |
S1 | Bearing rings heat stabilized for operating temperatures ≤ 200 °C (390 °F) |
Suffixes - Lubrication (n.a.) | |
Suffixes - Other variants | |
309829 | Larger balls |