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Designation system

The designations of SKF bearing accessories follow a system that consists of a product type and size designations with or without a suffix:
Basic bearing designation system
An example and the applicable options for adapter sleeves are given below.

Example

H 312 EHwhereH =
312 =
EH =

Applicable options for adapter sleeves

Test Designation 2
Product types
HAdapter sleeve, dimensions in accordance with ISO standard, basic design
HAAdapter sleeve, dimensions in accordance with ISO standard, except the bore, in 1/16 in.
HEAdapter sleeve, dimensions in accordance with ISO standard, except the bore, in 1/4 in.
HS
Adapter sleeve, dimensions in accordance with ISO standard, except the bore, in 1/8 in.
OH
Adapter sleeve, dimensions in accordance with ISO standard, prepared for oil injection
OSNP
Adapter sleeve, dimensions in accordance with ANSI standard, prepared for oil injection, with a locking plate
OSNW
Adapter sleeve, dimensions in accordance with ANSI standard, prepared for oil injection, with a lock washer
SNP
Adapter sleeve, dimensions in accordance with ANSI standard, with a locking plate
SNW
Adapter sleeve, dimensions in accordance with ANSI standard, with a lock washer
KH 
Unthreaded sleeve, basic design
KOH 
Unthreaded sleeve, prepared for oil injection

Test Designation 2
Size identification

Listed in the product tables for:

Catalogue image - Test Designation 3
Suffixes
BFor adapter sleeves for oil injection: One or two oil supply ducts at the end opposite the threaded section
BFor adapter sleeves for inch shafts: Whitworth thread
DSplit sleeve
EAdapter sleeve without key slot, with a KMFE lock nut or standard adapter sleeve with a HME lock nut
EHAdapter sleeve without key slot, with a KMFE .. H lock nut
ELAdapter sleeve without key slot, with a KMFE .. L lock nut
GThread diameter changed according to revised ISO standard
HOne oil supply duct at the threaded end
HBOne or two oil supply ducts at the threaded end
LAdapter sleeve with a lock nut with lower sectional height
TLSame as L, but with key slot positions for a locking clip
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