Page 34 - Rollingbearings
P. 34
A.1 Bearing basics
Prefixes and suffixes Bearing designations
not covered by the
The designations of most SKF rolling bear-
ings follow a system that consists of a basic basic system
designation with or without one or more
preixes and/or sufixes, as shown in
diagram 2. Insert bearings
Preixes and sufixes provide additional
information about the bearing. The designations for insert bearings differ
Preixes are mainly used to identify com- somewhat from those described in the basic
designation system and are described under
ponents of a bearing. They can also identify
Bearing basics bearing variants. Insert bearings, page 339.
Sufixes identify designs or variants, which
differ in some way from the original design
Needle roller bearings
or from the current basic design. The sufixes
one special feature is to be identiied, sufixes
A.1 are divided into groups. When more than The designations for needle roller bearings
do not fully follow the basic designation sys-
are provided in the order shown in
diagram 2. tem and are described under Needle roller
Details of the signiicance of speciic pre- bearings, page 581.
ixes and sufixes are given in the relevant
product sections.
Tapered roller bearings
The designations for metric tapered roller
bearings follow either the basic designation
system or a designation system, established
by ISO in 1977, covered in ISO 355. Inch
tapered roller bearings are designated in
accordance with the relevant ANSI/ABMA
standard. The designation system is
explained under Tapered roller bearings,
page 665.
Customized bearings
Bearings designed to meet a speciic cus-
tomer requirement are typically designated
by a drawing number. The drawing number
does not provide any information about the
bearing.
Other rolling bearings
Rolling bearings not covered in the ball bear-
ings and roller bearings sections, such as
super-precision bearings, thin section bear-
ings, slewing bearings or linear bearings,
follow designation systems that can differ
signiicantly from the basic designation
system.
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