Designation system for inch roller bearing units
The designations of SKF roller bearing units follow a system that consists of a basic designation with or without one or more prefixes and/or suffixes.

Example
FSYE 2 7/16 NH -118
| where | F = | ![]() |
SYE = | ![]() |
||
2 7/16 = | ![]() |
||
NH -118 = | ![]() |
Applicable options
![]() | Prefix
|
– | For pillow block units: two-bolt base |
F | For pillow block units: four-bolt base |
![]() | Series |
SYE | Pillow block unit |
SYR | Pillow block unit |
FYE | Square flange unit |
FYR | Round flange unit |
FYRP | Piloted flange unit |
![]() | Size identification |
... | Shaft diameter [in.] |
![]() | Suffixes1) | |
N | SKF ConCentra | |
H | Locating bearing unit | |
Y | Closed end (end plug supplied) | |
-3 | Radial shaft seal (for collar-mount units) | |
-18 | Labyrinth seal (for collar-mount units) | |
-118 | Labyrinth seal (for SKF ConCentra units) |
- 1)When multiple suffixes are used, they are listed in the same order as shown here.