Table Of ContentJAPAN
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this legal document is hereby made available on a noncommercial basis, as it
is the right of all humans to know and speak the laws that govern them.
JIS D 9414 (2008) (English): Bicycles -- Brakes
The citizens of a nation must
honor the laws of the land.
Fukuzawa Yukichi
JAPANESE
INDUSTRIAL
STANDARD
Translated and Published by
Japanese Standards Association
JIS D 9414
:2008
(JBPI/JSA)
Bicycles- Brakes
ICS 43.150
Reference number: JIS D 9414 : 2008 (E)
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D 9414 : 2008
Date of Establishment: 1964-03-01
Date of Revision: 2008-03-20
Date of Public Notice in Official Gazette: 2008-03-21
Investigated by: Japanese Industrial Standards Committee
Standards Board
Technical Committee on Consumer Life Products
D 9414: 2008, First edition published in 2008-10
.L;.I.'F,J.J,'::HL
Translated and published by: Japanese Standards Association
4-1-24, Akasaka, "tv1inato-ku, Tokyol 107-8440 JAPAN
In the event of any doubts as to the contents,
the original is to be the authority.
reserved. Unless otherwise specified, no part of this publicfltioll may be reproduced or
in form by means, electronic or mechanicaL including photocopying and
microfilm, permis:;ion writing from the
Printed in J<lp<lll
AT
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D 9414: 2008
Contents
1 Scope·································· .. · .... · .. · ... · .. · .............................................................. ········1
2 NOflllative references ........................................................... ····· .. ············· .. ········ .. ···1
3 Shape and dime11sions ............................................................................................ 1
4 Constitution and classification .............................................................................. 2
4.1 Constitutioll·········· .. ··· .. ·· .. · .... ·············· .. ·· .... · ............................................................. 2
4.2 Classification of brakes ....................................................................... ···· .... ···· .. · .. ···2
4.3 Classification of brake levers .................................................................. · .. · .... ···· .. ·2
4.4 Classification of operation-force transmissions · .... ···· .... ··········· .... · .. ···· .. · .. · .. ········2
5 Nalnes of .......................................................................... · .. ·· .. ······ .... · .. ····· .. ····2
6 Construction ................................................................. ·············· .. · ...... ··· .. ········ .. ······2
7 Performallce····· .. ·· .. · .. · ............................................................................................... 3
8 Strength· ...... · .. ········ .. ··········· ... ·· .. · .. ··· ........................................................ · .... ·· .. ·· .... ·4
9 .................................................................................. ··· .. · .... · .... · .... · .... ···· .. ··· .. · .. ·4
1~ests
9.1 Static bl'aking torque test ................................................................................. ·. . ··4
9.2 Measurelnent of run-out of brakes .. · .... · .... ···· .. · .. · .......... ·· .... · .. · .. · .. ·· .. · .. · .... ·· .. ·· .. · .. ·5
9.3 Strength test of brake cable ........................................................................ ···· .. ····5
9.4 Retention strength test of brake block and block holder .................................. 6
9.5 Repeating load test for brake ................................................................................ 7
10 Plating' and painting .................................................................. ·· .. · .... ·. . · .... ······· .... ·8
10.1 ....................................................................................................................... 8
10.2 Paintin.g· .. ·· .... ·. .......... ··· ............ ·· .. ········· .. ··· ....... ·· .. ·· ...... · .. ·· .. ···· .. ················· .. ··· .. ··· .. ··8
11 Appearance··· .. ···· .. ··········· .. ·········· .. · .. ··· .... ··· .... ·· .... ··· .. · .. ······· .. ··· .. ···· .. ··· .... · .. · .. · .... ···· .. 8
12 DesiglJation. of products ...... ··· ................................................................................. 9
13 1Vlarking ....... ·· ...... ·. ....................... ······ .. ······ ......... ·· ........ · .... ·· .... ···· .. ····· .. ········ .. ····· .. ···9
14 Instr·uction Illanual········ .. · .. ····· .. ··· .. ·· .... · .. · .. · .. ········ .. ······ .......................................... 9
Annex A (informative) Bibliography .... · .. · ........ · ........ ··· .. ·· .... · .. · .... ·· ...... · .......... · ........ · .. ·28
(i)
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D 9414: 2008
Foreword
This translation has been made based on the original eJapanese Industrial Standard
revised the Minister of Economy, Trade and Industry through deliberations at the
Japanese Industrial Standards Comlnittee as the result of proposal for revision of
~Japanese Industrial Standard submitted by the Japan Bicycle Promotion Institute
(JPBD/Japanese Standards Association \vith the draft being attached, based on
the provision of Article 12 Clause 1 of the Industrial Standardization Law applicable
to the case of revision by the provision of Article 14.
Consequently JIS D 9414: 1997 is replaced with this Standard.
This JIS document is protected the Copyright Law.
Attention is drawn to the possibility that som.e parts of this Standard may conflict
with a patent right, application for a patent after opening to the public, utility model
right or application for registration of utility model after opening to the public which
have technical properties. The relevant l\1inister and the .J apanese Industrial Standards
Committee are not responsible for identifying the patent right, application for a patent
after opening to the public, utility model right or application for registration of utility
model after opening to the public which have the said technical properties.
(ii)
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JAPANESE INDUSTRIAL STANDARD JIS D 9414 : 2008
1 Scope
This Japanese Industrial Standard the brake assemblies used for bicycles
for use and for bicycles for young children specified in JIS D 9111.
2 Normative references
The fonowing standards contain provisions which, through reference in this text,
constitute provisions of this Standard. The most recent editions of the standards
(including mnendments) indicated below shall be applied.
tJIS A 1481 Detennination ol asbestos in building rnaterial products
~JIS B 0205-1 ISO general purpose metric screw threads-Part 1: Basic prolile
tJIB B 0205-2 ISO general purpose metric screUJ threads-Part 2: General plan
JIS B 0205-3 ISO general purpose metric screZ.D threads-Part 3: Selected sizes lor
screws, bolts and nuts
tHS B 0205-4 ISO general pw})ose rnetric screw threads-Part 4: Basic dirnensions
JIS B 0209-1 [SO general purpose metric screw threads-Tolerances-Part 1: Prin
ciples and basic data
JIS B 0209-2 ISO general purpose metric screw threads-Tolerances-Part 2: Lim
its ol sizes lor general purpose external and internal screw threads-
lvledillln quality
JIS B 0209-3 ISO general purpose metric screw threads-Tolerances-Part 3: De
viations jor constructional screw threads
JIS B 0225 Cycle threads
.JIS D 0202 General rules ol coating filn1,s for automobile parts
JIS D 9111 Cycles-Classilication and essential characteristics
JIS D 9301 Bicycles jar general use
JIS D 9302 Bicycles lor young children
JIS D 9412 Handlebars lor bic:ycles
JIS D 9418 wheels and hub cogs
JIS H 8610 Electroplated coatings ol zinc on iron or steel
.JIS H 8617 Electroplated coatings ol nichel and chromium
3 Shape and dimensions
Examples of shape and dimensions of brake-assemblies are shown in figures 5 to
9. The dimensions without indication of tolerances are recommended dimensions. The
screw threads other than those according to JIS B 0225 shall be in accordance with
the specifications of JIS B 0205·1 to JIS B 0205·4. The limit dimensions and toler
ances shall be 6H/6g of lllOre of the tolerance zone class specified in JIS B 0209-1 to
JIS B 0209-3.
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D 9414: 2008
The screw threads specified in Annex A to JIS D 9418 may be used for the attach
ment of brake drull1 of band brake, that of internal expanding brake and the disc of
disc to the hub, upon between the concerned with delivery.
4 Constitution and classification
4.1 Constitution
Brake assemblies shall consist of a brake, a brake lever and an operating-force trans
nlission, and each of these components shall be classified as follows. The brake as
sembled with brake-lever combined handlebars specified in ,JIS D 9412 shall be
constituted without brake level'.
4.2 Classification of brakes
Brakes shall be classified as given in table 1, according to functional mechanisIl1.
Table 1 Classification of brakes
Classification of brakes Functional mechanism Figure of reference
(informative)
Pull-up rim brake Working on rim part Figure 5
Caliper brake (side-pull type, Figure 6
centre-pull type, cantilever type,
cantilever V type)
Band brake Working on hub
Internal expanding brake
Disc brake Figure 9
Note aj The brake hub and coaster brake hub which are the composite bicycle
parts having both the function of braking device and that of running
device in a hub mechanism are to be in accordance with the specifica-
tion of JIS D 9419, and are not subjected to this Standard.
4.3 Classification of brake levers
Brake levers shall be classified into the touring brake lever, drop handlebar brake
lever (including extension brake lever), guidonnet brake lever and inverted brake lever
(see figure 10).
4.4 Classification of operation-force transmissions
Operation-force transmission shall be classified by construction into rod system, cable
system and hydraulic
5 Names of parts
N ames of parts of brake assemblies and exam.ples of rnaterials mainly used are
shown in figures 5 to 11.
6 Construction
The construction of brake assemblies shall be as follows.
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D 9414: 2008
a) Each assembly and connection shall be correct and be functionally actuated.
b) The brake assemblies shall be capable of adjustment to n1aintain the braking per
fm'mance providing for wearing of brake blocks or elong'ation of brake cables or
the like.
c) Suitable friction nlaterials shall be used for the brake blocks, linings and pads.
Brake materials that contain asbestos shall not be used. The asbestos content
shall be determined according to clause 7 of JIS A 1481.
d) The cable fixing structure shall be such that no cable strand is fractured when
fastened with the screws by the manufacturer's recomlnended tightening torque.
e) Attachment fasteners of caliper brake to frame or front fork shall be provided with
locking devices (spring washer, lock nut and the like).
f) The brake asselnbly using hydraulic system of operation-force transmission shall
be free from any oil leakage.
g) Brake lever fitting shall be capable of securely fixing the brake lever to handle
bars.
7 Performance
The performance of brake assembly shall be as follows.
a) The brakes working on rim part, when assembled with bicycle, shall cOlnply with
the specification of braking performance of 5.2.5 in JIS D 9301 or 5.2.5 in JIS
D 9302. The brakes working on hub part, when tested in accordance with 9.1,
shall comply with the static braking torque values in driving relative to the test
forces F of table 2.
Table 2 Static braking torque value
Diameter of drum or disc Test force F Static braking torque of brake
mm N N'm
80 max. 150 35 min.
Over 80 up to and incl. 95 200 40 min.
Over 95 50 min.
For the disc brake, 40 N· m or over of static braking torque to 200 N of
test force shall be applied.
b) The run-out of each part of brake working on hub part, when tested in accordance
with 9.2, shall satisfy the requirements in table 3.
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