ISO 12240-2:1998 球面すべり軸受 — Part 2: アンギュラコンタクトラジアル球面すべり軸受 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standard bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

International Standard ISO 12240-2 was prepared by Technical Committee ISO/TC 4, Rolling bearings, Subcommittee SC 7, Spherical plain bearings.

ISO 12240 consists of the following parts, under the general title Spherical plain bearings:

• Part 1: Radial spherical plain bearings
• Part 2: Angular contact radial spherical plain bearings
• Part 3: Thrust spherical plain bearings
• Part 4: Spherical plain bearing rod ends

1 Scope

This part of ISO 12240 specifies dimensions and tolerances for angular contact radial spherical plain bearings.

The specified tolerance values apply to finished, angular contact radial spherical plain bearings before any coating or plating.

Angular contact radial spherical plain bearings need not conform to the design illustrated but compliance is required as regards dimensions and tolerances specified.

2 Normative references

The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 12240. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 12240 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.

3 Definitions and symbols

For the purposes of this part of ISO 12240, the definitions given in ISO 1132-1 and ISO 6811 apply. The symbols (except those for tolerances) shown in figure 1 and the values given in the tables denote nominal dimensions unless specified otherwise.