ABMA 13414:1997(R1999) pdf download

ABMA 13414:1997(R1999) pdf download.Aerospace一Airframe needle roller bearings, single-row, shielded- – Inch series
1 Scope
This Intemational Standard specifies the characteristics, boundary dimensions, tolerances, intemal clearances and permissible static loads of metric series, single-row, stud type needle track rollers used in airframe applications. The airframe needle roller bearings covered by this Intemational Standard are designed to operate in the temperature range -54 C to +121 °C.
2 Nomative references
The following standards contain provisions which, through reference in this text, constitute provisions of this Intermational 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 possibiliy of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid Intemational Standards. ISO 286-2:1988, ISO system of limits and fits 一Part 2: Tables of standard tolerance grades and limit deviations for holes and shats. ISO 683-17:- “, Heat-treated steels, aloy steels and free cuting steels – Part 17: Ball and rller bearing steels. ISO 1132:1980, Rolling bearings 一Tolerances 一Dfinitions. ISO 2082:1986, Metallic coatings一Electroplated coatings of cadmium on iron or steel. ISo 3353:1976, Aerospace一Rolled threads for bolts一Lead and runout requirements. ISO 4520:1981, Chromate conversion coatings on electroplated zinc and cadmium coatings. ISO 5593:1997, Rolling bearings一Vocabulary. Iso 5855-1:1988, Aerospace一MJ threads一Part 1: General requirements. ISO 5855-2:1988, Aerospace一MJ threads一Part 2: Limit dimensions for bolts and nuts. ISO 6158:1984, Metallic coatings一Electroplated coatings of chromium for engineering purposes. ISO 13411:1997, Aerospace- Airframe needle roller, cylindrical roller and track roller bearings – – Technical specification. AMS 2417E:1993, Plating, zinc-nickel aloy.
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 shall be cadmium or zinc-nickel plated. 7.2 If made of corrosion resisting steel, cadmium plating (code letter H) shall be subject to agreement between the customer and the manufacturer. 7.3 Where cadmium plating is specified (code letters D, M and H), it shall be in accordance with ISO 2082. The thickness of the plating shall not be less than 7 um and not more than 15 um. The bearing shall be embitement- relieved within 4 h of plating by heat treatment at 140 C土10。C for a minimum of 8 h followed by chromate treatment in accordance with Iso 4520 (code letters D and H only). 7.4 Where chromium plating is specified (code ltters D, M and Z), it shall be in accordance with ISO 6158. The thick- ness of the plating shall be not less than 10 um, 8 um on faces and ring chamfers, and not more than 25 μm. 7.5 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 um or not more than 15 μm.
8 Optional features
8.1 Lubrication fting/cotter pin hole In addition to the lubrication ftting in the flanged end of the stud, these track rollers may also be supplied with a suitable lubrication fting (see annex A) in the threaded end of the stud. They may also be supplied with a cotter pin hole. These features are specified in the designation as noted below. Code Feature S lubrication fting in flanged end of stud, no cotter pin hole P lubrication fting in flanged end of stud, with cotter pin hole L lubrication fting in both threaded and flanged ends of stud, no cotter pin hole 8.2 Grip length Bearings shall be supplied in the grip lengths shown in table 2. Several gnip lengths are available for each diameter code. The grip length is specified through a two digit designation code using the grip lengths shown in table 2:
9 Designation
Bearings covered by this Intermational Standard shall be designated only as in the fllowing example: