ISO 13412:1997

Aerospace — Airframe needle track roller, yoke type, single-row, sealed — Inch series

Aéronautique et espace — Galets de came à aiguilles pour étrier, à une rangée, avec joints, pour cellule d'aéronef — Série "inch"

General Information

• Status: Withdrawn
• Publication Date: 24-Dec-1997
• ICS: 49.035 - Components for aerospace construction
• Technical Committee: ISO/TC 20 - Aircraft and space vehicles
• Drafting Committee: ISO/TC 20 - Aircraft and space vehicles
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 15-Jul-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 13412
First edition
1997-12-15
Aerospace — Airframe needle track roller,
yoke type, single-row, sealed — Inch series
Aéronautique et espace — Galets de came à aiguilles pour étrier, à
une rangée, avec joints, pour cellule d'aéronef — Série «inch»
A
Reference number
ISO 13412:1997(E)

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ISO 13412:1997(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards 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 13412 was prepared by Technical Committee ISO/TC 20, ,
Aircraft and space vehicles
Subcommittee SC 15, .
Airframe bearings
Annex A forms an integral part of this International Standard. Annex B is for information only.
©  ISO 1997
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet [e-mail]
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
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ISO ISO 13412:1997(E)
Introduction
At the time this International Standard was developed, the imperial units sizes of airframe needle roller bearings were
dominant in world application. The basis for this International Standard is the imperial units provided in annex B.
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INTERNATIONAL STANDARD  ISO ISO 13412:1997(E)
Aerospace — Airframe needle track roller, yoke type, single-row,
sealed — Inch series
1 Scope
This International Standard specifies the characteristics, boundary dimensions, tolerances, internal 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 to 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
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 International 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 International Standards.
1)
ISO 683-17:— , Heat-treated steels, alloy steels and free-cutting steels — Part 17: Ball and roller bearing steels.
ISO 1132:1980, Rolling bearings — Tolerances — Definitions.
ISO 2082:1986, Metallic coatings — Electroplated coatings of cadmium on iron or steel.
2)
ISO 2859-1:— , Sampling procedures for inspection by attributes — 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 — Vocabulary.
ISO 6158:1984, Metallic coatings — Electroplated coatings of chromium for engineering purposes.
ISO 13411:1997, Aerospace — Airframe needle roller, cylindrical roller and track roller bearings — Technical
specification.
3)
AMS 2417E:1993,
Plating, zinc-nickel alloy.

1)
 To be published. (Revision of ISO 683-17:1976)
2)
 To be published. (Revision of ISO 2859-1:1989)
3)
Available from: SAE International
400 Commonwealth Drive
Warrendale, PA 15096-0001
USA
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ISO 13412:1997(E) ISO
3 Definitions
For the purposes of this International Standard, the definitions given in ISO 5593 apply.
4 Symbols
4.1 For the purposes of this International Standard, the symbols given in ISO 1132 apply. The symbols (except those
for tolerances) shown in the figures and the values given in the tables denote nominal dimensions unless specified
otherwise.
4.2 The following additional symbols for bearings covered by this International Standard also apply.
B overall width (over faces of end washers)
C permissible static radial load
s
d clamping face diameter
a
R crown radius of outer ring
5 Required characteristics
5.1 Dimensions — Tolerances — Internal clearances — Loads
For values, see table 1. For configuration, see figure 1.
Table 1
Dimensions in millimetres,
tolerance and clearance values in micrometres
dD B C Rr d Internal C
s a s
Tolerance values Mass
clearance
Diameter
code
D K D K Radial, Axial,
dmp ia Dmp ea
0 0
G G kg
r a
- 254 - 381
max. max. min. min. min. kN
max. max. »
03 4,826 19,05 7,93 7,12 11,2 5,34 0,01
04 6,35 22,225 9,53 8,77 254 0,55 13,2 8,49 0,02
06 9,525 26,988 12,7 11,56 17,1 16 0,05
08 12,7 33,338 15,88 14,74 318 21,5 25,7 0,08
10 15,875 38,1 19,05 17,91 444 24,3 37,8 0,13
12 19,05 44,45 25,4 24,13 635 28,2 46 63,1 0,24
0 + 25
14 22,225 50,8 28,58 27,31 25 41 698 31 635 85,8 0,34
- 18 - 25
20 31,75 63,5 31,75 30,48 762 41,3 112,5 0,53
24 38,1 76,2 0,81 50,8 168,5 1,07
28 44,45 87,312 58 196,1 1,23
32 50,8 98,425 65,1 217,5 1,55
38,1 36,58 1524
72,7 244,6 1,92
36 57,15 109,538
40 63,5 120,65 79 51 266,4 2,33
44 69,85 127 85 288,2 2,49
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ISO ISO 13412:1997(E)
Key
1 Lubrication groove
2 Lubrication groove and holes
Figure 1
5.2 Surface roughness
Rollers: R = 0,2 mm max.
a
Inner ring raceway: = 0,4 m max.
R m
a
Outer ring raceway: R = 1,0 mm max.
a
End washers: R = 1,6 mm max. at roller contact area
a
6  Materials
Rings: bearing steel - ISO 683-17, type 1, raceway hardness 58 HRC to 66 HRC (670 HV to 860 HV).
Rollers: bearing steel - ISO 683-17, type 1, heat treated to 58 HRC to 66 HRC (670 HV to 860 HV).
End washers: steel heat treated to 51 HRC to 60 HRC (528 HV to 697 HV) at roller contact area.
Seals: acetal resin, nylon or equivalent.
7 Surface treatment
7.1 Bearings made of conventional rolling bearing steel, shall have the external surfaces of the outer ring chromium
plated, and all other external surfaces, except the inner ring bore surface, shall be cadmium or zinc-nickel plated.
Black oxide coating is a permissible alternate on all inner ring external surfaces (see annex A).
7.2 Where cadmium plating is specified (code letters D and M), it shall be in accordance with ISO 2082. The thickness
of the plating shall not be less than 7 m and not more than 15 m. The bearing shall be embrittlement-relieved within
m m
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ISO 13412:1997(E) ISO
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 mm, 8 mm on faces and ring chamfers, and not more than 25 mm.
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 mm and not more than 15 mm.
8  Lubrication
The bearing shall be prelubricated with either grease A or B, as specified by the customer.
NOTE — Descriptions of grease A and grease B are given in ISO 13411:1997, annex I.
9 Designation
Bearings covered by this International Standard shall be designated only in the manner shown in the following
example:
where the following codes are applied:
— greases:
A = ester type grease;
B = synthetic hydrocarbon type grease;
— materials/surface treatments:
D = material: low alloy bearing steel;
surface treatment: outer ring - chromium plated;
washer - cadmium plated with chromate conversion coating;
inner ring - cadmium plated with chromate conversion coating, or black oxide coated;
M = material: low alloy bearing steel;
surface treatment: outer ring - chromium plated;
washer - cadmium plate without chromate conversion coating;
inner ring - cadmium plated without chromate conversion coating, or black oxide coated;
Z =  material: low alloy bearing steel;
surface treatment: outer ring- chromium plated;
washer - zinc-nickel plated;
inner ring - zinc-nickel plated, or black oxide coated.
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ISO ISO 13412:1997(E)
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