BS ISO 6811:1998 pdf free download.Spherical plain bearings Vocabulary.
1 Scope
BS ISO 6811 presents general terms and definitions relevant to the field of spherical plain bearings. It deals with bearings, bearing parts and features, movements, angles and rod ends.
NOTE In addition to terms and definitions used in the three official ISO languages (English, French and Russian). BS ISO 6811 gives the equivalent terms and definitions in the German language: these are published under the responsibility of the member body for Germany (DIN). However, only the terms and definitions given in the official languages can be considered as ISO terms and definitions.
2 Principles and rules followed
2.1 Constitution of the vocabulary
The vocabulary comprises a) terms, with their definition,
in systematic order
(see clause 3):
b) figures with index numbers of relevant terms (see clause 4);
c) alphabetical listings of the terms, with their index numbers (see the index).
2.2 Constitution of clause 3 on terms and definitions The terms and definitions are given in groups and subgroups, arranged in systematic order.
A two-digit serial number is assigned to each group. e.g. 01, 02, etc.
Each group is divided into subgroups, to each of which is assigned a four-digit serial number, the first two digits being those of the group. Each entry (a term with its definition) is assigned a six-digit index number, the first four digits being those of the subgroup.
A term printed in bold typeface in a definition is defined in another entry in BS ISO 6811. The basic form of each such term is included in the alphabetical index, where the index number of the corresponding entry is shown.
2.3 Constitution of clause 4 on figures Each figure gives the index numbers of relevant terms. A figure usually shows only one example of the several existing forms of a bearing or part. in most cases the figures are simplified and leave out unnecessary details.
3 Terms and definitions
01
bearings
support or a guide by means of which a moving part is located with respect to other parts of a mechanism
[ISO 4378-11
01.01
plain bearings
bearing in which only sliding friction takes place
[ISO 4378-1]
01.01.01
spherical plain bearing
plain bearing, designed primarily for oscillatory, tilting and slow rotational movements, in which the sliding contact surfaces are spherical Figure 1 to Figure 6.
01.01.02
radial spherical plain bearing spherical plain bearing intended to support primarily radial load
Figure 1. Figure 2, Figure 3, Figure 6.
01.01.03
radial contact spherical plain bearing radial spherical plain bearing having a nominal contact angle of 0°
Figure 1, Figure 6.
01.01.04
spherical plain bearing outer ring with ball stud
spherical plain bearing in which a ball stud is mounted in place of an inner ring Figure 6.
01.01.05
spherical plain bearing with stud spherical plain bearing in which a stud is mounted
Figure 7.
02.01.03
sphered outer surface
surface of an inner ring, shaft washer or ball stud intended to make sliding contact with the outer ring, housing washer or rod end eye and having a convex surface being part of a sphere
Figure 6, Figure 8, Figure 10. Figure 23.
02.01.04
sphered inner surface
surface of an outer ring, housing washer or rod end eye intended to make sliding contact with the inner ring, shaft washer or ball stud and having a concave surface being part of a hollow sphere
Figure 6, Figure 8, Figure 9, Figure 10, Figure 23.
02.01.05
sliding contact surface
those parts of the sphered outer surface and sphered inner surface of a spherical plain bearing which are in contact.
Figure 1 to Figure 6.
02.01.06
face
that surface of a ring, washer or rod end eye which is nominally perpendicular to the axis of the ring, washer or rod end eye
Figure 8, Figure 23.
02.01.07
back face
that face of an angular contact radial spherical plain bearing or of an angular contact thrust spherical plain bearing which is intended to support axial load
Figure 9, Figure 10.
02.01.08
front face
that face of an angular contact radial spherical plain bearing or of an angular contact thrust spherical plain bearing which is opposite to the back face and not intended to support axial load Figure 9, Figure 10.
02.02.05
ball stud
stud-shaped element, the head of which is spherical and adapted for use in place of the inner ring of a spherical plain bearing
Figure 6, Figure 25, Figure 27.
02.02.06
outer ring
that part of a radial spherical plain bearing which has a sphered inner surface
Figure 6, Figure 8. Figure 9.
02.02.07
outer ring back face
that face of an outer ring which is intended to support axial load
Figure 9.
02.02.08
outer ring front face
that face of an outer ring which is opposite to the back face and not intended to support axial load Figure 9.
02.02.09
one-piece outer ring
outer ring manufactured and assembled in one piece, i.e. not divided, split or fractured in any way
Figure 9, Figure 14.
02.02.10
two-piece outer ring, axially separable
outer ring divided into halves in a plane perpendicular to the ring axis to facilitate assembly and/or mounting
Figure 11, Figure 17.
05.01.02
rod end eye
flattened eye shaped part of a rod end housing which has either a cylindrical or sphered bore Figure 20 to Figure 22.
05.01.03
rod end shank
that part of a rod end housing extending radially from the rod end eye and having an external thread, internal thread or welding shank for fastening the rod end to the end of a rod
Figure 20 to Figure 22.
05.02 Features
05.02.01
external thread
external thread on the rod end shank of a rod end housing
Figure 20.
05.02.02
internal thread
internal thread in the rod end shank of a rod end housing
Figure 21.
05.02.03
welding shank
that part of a rod end housing specifically designed with a locating pin for fastening a rod end to a rod by welding
Figure 22.
05.02.04
wrench flats
parallel flats on an internal threaded rod end shank which allow the application of a wrench for fastening the rod end to a threaded rod
Figure 21.