ABMA 14190:1997(R1999) pdf download.Aerospace一Airframe rolling bearings: ball and spherical roller bearings – Technical specification
1 Scope
This Intemational Standard specifies the required characteristics, inspections and tests, quality assurance and conditions for qualification, permissible static loads, acceptance and delivery conditions for rigid and self-aligning airframe ball and spherical roller bearings. These bearings are designed to withstand, under load, slow rotations and small oscillations only. It is applicable to all airframe ball and spherical roller bearings in the referenced International Standards or in a design specification. The fact that a rolling bearing is not included in this Intemational Standard does not preclude its use in airframe applications.
2 Normative references
The foilowing standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this Intermational Standard 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 Intermational Standards. ISo 1132:1980, Rolling bearings一Tolerances 一Definitions. ISo 2859-1:- 1), Sampling procedures for inspection by attributes一Part 1: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection. ISO 4288:1996，Geometrical Product Specifications (GPS)一Surface texture: Profile method- Rules and procedures for the assessment of surface texture. ISO 5593:1997, Rolling bearings – – Vocabulary. ISO 6507-1:1997, Metllic materials一Vickers hardness test 一Part 1: Test Method. ISO 6508-1:一 -2), Metailic materials一Rcckwell hardness test (scalesA, B,C, D,E,F,G,H,K,N,刀一Part 1: Test method. ISO 9001:1994, Quality systems一Model for quality assurance in design, development, production, insallation and servicing.
3 Definitions
For the purposes of this Intemational Standard, the definitions given in ISO 5593, ISO 1132, and the following apply. 3.1 delivery batch quantity of olling bearings shipped or to be shipped which have the same identity block, but may come from different production batches 3.2 sealed rolling bearings bearings in which the roling elements and raceways are protected by contact seals (ie, seals ftted to one ring and extending to the other ring with which they make sliding contact) 3.3 shielded rolling bearings bearings in which the rolling elements and raceways are protected by shields ftted to one ring and extending to the other ring with which they have a small clearance 3.4 surface discontinuities imperfections which include, but are not limited to, the following: 3.4.1 crack break in the material which may extend in any direction and which may be intercrystalline or transcrystalline in character 3.4.2 open surface defect surface defect resulting from a tearing of the metal, such as a tool mark, score or scratch 3.4.3 surface defect where particles of metai or sharp edges are folded over and then rlled or forged into the surtace 3.4.4 seam unwelded fold which appears as an open defect in the material 3.5 starting torque without load maximum torque required to start rotation of a ring about the other NOTE – – – Due regard should be given the fact that bearings without retainers or separators are not likely to have aDsolute freedom of rotation because of adjacent rlling elements rubbing each other. 3.6 permissible static loads 3.6.1 . permissible static radial load maximum static radial load which can be applied to the bearing without impairing its subsequent operation 3.6.2， permissible static axial load maximum static axial load which can be applied to the bearing without impairing its subsequent operation 3.6.3 utimate static radial load maximum static radial load which can be applied to the bearing without causing cracks or ruptures in any of the component parts NOTE .一The ultimate static radial load is a load equal to 1,5 times the permissible static radial load. 3.6.4 utimate static axial load maximum static axial load which can be applied to the bearing without causing cracks or ruptures in any of the component parts
ABMA 14190:1997(R1999) pdf download
