ABMA 13412:1997(R1999) pdf download

ABMA 13412:1997(R1999) pdf download.Aerospace一Airframe needle track roller, yoke type, single-row, sealed一Inch series
1 Scope
This International Standard specifies the characteristics, boundary dimensions, tolerances, intermal clearances and permissible static radial loads of inch series, single-row, yoke type, needle track rollers used in airframe applications. The airframe needle track rollers covered by this International Standard are designed切o operate in the temperature range -54 °C to +121 °C. .
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this Intemational Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this Intemational 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 683-17:- “, Heat-treated steels, alloy steels and free cutting stees一Part 17: Ball and roller bearing steels. ISO 1132:1980, Rolling bearings一Tolerances 一Definitions. ISO 2082:1986, Metllic coatings一Electroplated coatings of cadmium on iron or steel. ISO 2859-1:- 2” , Sampling procedures for inspection by attributes一Part 1: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection. ISO 4520:1981, Chromate conversion coatings on electroplated zinc and cadmium coatings. ISo 5593:1997, Rolling bearings一Vocabulary. ISO 6158:1984, Metallic coatings一Electroplated coatings of chromium for engineering purposes. ISO 13411:1997, Aerospace- – Arframe needle roller, cylindrical roller and track roller bearings 一Technical specification.
7 Surface treatment
7.1 Bearings made of conventional rolling bearing steel, shall have the extemal surfaces of the outer ring chromium plated, and all other extemal surfaces, except the inner ring bore surface, shall be cadmium or zinc-nickel plated. Black oxide coating is a permissible altermate on all inner ring extemal surfaces (see annex A). 7.2 Where cadmium plating is specified (code ltters D and M), it shall be in accordance with ISO 2082. The thickness of the plating shall not be less than 7 μm and not more than 15 μm. The bearing shall be embrittlement-relieved within  4 h of plating by heat treatment at (140+10)C for a minimum of 8 h followed by chromate treatment in accordance with ISO 4520 (code letter D only). 7.3 Where chromium plating is specified (code letters D, M and Z), it shall be in accordance with ISO 6158. The thickness of the plating shall be not less than 12 μm, 8 μm on faces and ring chamfers, and not more than 25 um. 7.4 Where zinc-nickel plating is specified (code letter Z) it shall be in accordance with AMS 2417E, type 2. The thickness of the plating shall not be less than 7 μm and not more than 15 μm.
8 Lubrication
The bearing shall be prelubricated with either grease A or B, as specified by the customer. NOTE一Descriptions of grease A and grease B are given in ISO 13411:1997, annex I.
9 Designation
Bearings covered by this Intemational Standard shall be designated only in the manner shown in the following example: