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 |
