ISO 6811 pdf download.Spherical plain bearings – Vocabulary
1 Scope
This International Standard presents general terms and definitions rele- vant to the field of spherical plain bearings. It deals with bearings, bearing parts and features, move- ments, angles and rod ends. NOTE- In addition to terms and definitions used in the three official I S0 languages (English, French and Rus- sian), this International Standard gives the equivalent terms and definitions in the German language; these are pub- lished under the responsibility of the member body for Germany (DIN). However, only the terms and defini- tions given in the official languages can be considered as I S 0 terms and defini- tions.
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 as- signed to each group, e.g. 01, 02, etc. Each group is divided into sub- groups, to each of which is as- signed 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 this International Standard. The basic form of each such term is included in the alphabetical index, where the index number of the cor- responding entry is shown.
2.3 Constitution of clause 4 on figures
Each figure gives the index num- bers 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.
2.4 Constitution of the index
The index includes all terms given and defined in clause 3. Multiple- word terms appear in alphabetical order both by natural order of words and by their key words. The index refers to the index num- ber of the entry in clause 3 where the term is defined.
3 Terms and definition
s o1 bearings support or a guide by means of which a moving part is located with respect to other parts of a mechanism [ISO 4378-1 ] 01.01 plain bearings bearing in which only sliding friction takes place [IS0 4378-11 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 Figures 1 to 6. o1 .o1 .oz radial spherical plain bearing spherical plain bearing intended to support primarily radial load Figures 1 , 2, 3, 6.