Cookies on the SKF website

We use cookies to ensure that we give you the best experience on our websites and web applications. By continuing without changing your browser settings, we assume you give your consent to receive cookies. However, you can change your browser cookie setting at any time.

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
whereF =
SYE =
2 7/16 =
NH -118 =

Applicable options

Prefix
For pillow block units: two-bolt base
FFor pillow block units: four-bolt base

Series
SYEPillow block unit
SYRPillow block unit
FYESquare flange unit
FYRRound flange unit
FYRPPiloted flange unit

Size identification
...Shaft diameter [in.]

Suffixes1)
NSKF ConCentra
HLocating bearing unit
YClosed end (end plug supplied)
-3Radial shaft seal (for collar-mount units)
-18Labyrinth seal (for collar-mount units)
-118Labyrinth seal (for SKF ConCentra units)
  1. 1)When multiple suffixes are used, they are listed in the same order as shown here.
SKF logo