Designation system for seals

Examples and the applicable options for seals for SNL housings are given below.

Basic bearing designation system

Examples

TSN 518 L
whereTSN =
518 =
L =

Applicable options

Test Designation 1Series
TSNSeal for SNL plummer block housings
FSFelt strip
FSBFelt strip for high operating temperature

Test Designation 1Size identification
2(00)Housing for bearings with a cylindrical bore, diameter series 2
3(00)Housing for bearings with a cylindrical bore, diameter series 3
5(00)Housing for bearings on an adapter sleeve, diameter series 2
6(00)Housing for bearings on an adapter sleeve, diameter series 3
  (00)

Size code of the bearing, (00) x 5 = bearing bore diameter [mm]

...For felt strips only, number indicating the length of the strip

Test Designation 2Seal type
AV-ring seal
CFelt seal
CBFelt seal for high operating temperature
LFour-lip seal
SLabyrinth seal
NBTaconite heavy-duty seal with axial labyrinth and V-ring seal
NCTaconite heavy-duty seal with axial labyrinth
NDTaconite heavy-duty seal with radial labyrinth and V-ring seal

Test Designation 2Indication for an inch shaft
A, ESeal for inch shaft
SKF logo