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.
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