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Designations

The designations of SKF housings and associated components follow a system that consists of a basic designation with or without one or more prefixes and/or suffixes.
Examples and the applicable options for SKF housings for paper machines1) are given below.

ASBPN 3136 RA/P45
A =
SBPN =
3136 =
RA/P45 =

Prefix
AShort, wide base (SBPN series only)

Series
SBFNNon-split felt roll housing
SBPNNon-split drying cylinder housing
SDMYankee cylinder housing (split)

Size identification
22(00)Housing for bearings in the 22 dimension series
23(00)Housing for bearings in the 23 dimension series
30(00)Housing for bearings in the 30 dimension series
31(00)Housing for bearings in the 31 dimension series
..(00)Size code of the bearing, x 5 = bearing
bore diameter [mm]
../..Bearing bore diameter [mm] e.g. ../530

Suffixes2)
Housing for metric thread connection arrangements (shaft, oil inlet and sensor attachment threads)
(SBFN and SBPN series only)
Housing for metric thread connection arrangements (shaft, oil inlet and sensor attachment threads) and through shaft
(SDM series only)
AHousing for a shaft end, with end cover
(SBFN and SBPN series only)
BHousing for a through shaft
(SBFN and SBPN series only)
B..Housing for a through shaft with a modified outer cover for a steam box connection (B1 to B99)
(SBPN and SDM series only)
FHousing for the locating bearing position (drive side)
RAHousing for a CARB toroidal roller bearing (front side)
N9Housing for inch thread connection arrangements (shaft, oil inlet and sensor attachment threads)
/P..Paint variant according to customer specification
(P01 to P999)
  1. 1)The designation system for SNL ... TURP housings is provided in the section on large SNL housings.
  2. 2)When multiple suffixes are used, they are listed in the same order as shown here.
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