Table Of Contentइंटरनेट मानक
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“जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ”
Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 2061 (1995): Bicycle - Front forks [TED 16: Bicycles]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
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“Knowledge is such a treasure which cannot be stolen”
.
IS 2061 : 1995
Indian Standard
::.
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BICYCLE-FRONTFORKS- SPECIFICATION
f First Revision J
:.
;’
UDC 629,118.3.011.5
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:
.:.
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Q BIS 1995
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
March.1995 Price Group 3
elcyciB lanoitceS ,eettimmoC DET 16
FOREWORD
sihT naidnI dradnatS ( tsriF noisiveR ) was detpoda yb eht uaeruB fo naidnI Standards, retfa eht tfard
dezilanif yb eht elcyciB lanoitceS eettimmoC ha 1 neeb devorppa yb eht tropsnarT gnireenignE noisiviD
.licnuoC
sihT standard was yllanigiro dehsilbup ni 1962. nI this ,noisiver ail stnemdnema gnitaler ot snoisnemid
and tcapmi tset cte evah neeb .dedulcni nI noitidda eht edarg fo leets ebut evah osla neeb .deificeps
nI gniraperp this standard, assistance has neeb devired morf eht :gniwollof
SIJ 049B : 1951 emarF rof elcyciB
SB 811 : 1950 elcyC .sdaerhT hsitirB Standards noitutitsnI
SB 1717 : 1951 leetS sebuT rof elcyC and rotoM elcyC sesopruP
/tsiM/G 119 suonegidnl ,selcyciB etarotceriD lareneG fo seilppuS and Disposals, tnemnrevoG
fo aidnI
Data teehS .oN 35b ( teehS .oN 5 ) kroF‘ ’sedalB eht hsitirB elcyC and rotoM elcyC -cafunaM
srerut and sredarT noinU .dtL
ehT eettimmoC noitisopmoC elbisnopser rof eht noitaraperp fo this standard is nevig ni xennA A.
roF eht esoprup fo gnidiced rehtehw a ralucitrap tnemeriuqer fo this standard is deilpmoc ,htiw eht lanif
,eulav devresbo ro ,detaluclac gnisserpxe eht tluser fo a ,tset shall eb dednuor ffo ni ecnadrocca htiw
SI 2 : 1960 seluR‘ rof gnidnuor ffo laciremun seulav ( desiver .‘) ehT rebmun fo tnacifingis secalp deniater
ni eht dednuor ffo eulav dluohs eb eht emas as that fo eht deificeps eulav ni this standard.
AMENDMENT NO.1 NOVEMBER 2010
TO
IS2061 :1995BICYCLE - FRONT FORKS
SPECIFICAnON
(FirstRevision)
(Page I, clause 2) - Substitute '513 : 2008 Cold reduced low carbon
steel sheetand strip (fifthrevision)' for '513 : 1994Cold-rolled lowcarbon steel
sheets andstrips(fourthrevision)'.
(Page I,clause3.1)- Substitutethe following forthe existing:
'3.1 Fork columnand forkblades shall be made from tubes conforming to grade
designation ERW-CI or ERW·C3 ofiS 2039 (Parts I to 3) : 1991. Fork blades
mayalso bemadefromCR Steelstripconformingtograde CRI ofIS513.'
(TED 16)
ReprographyUnit,BlS,NewDelhi,India
SI 2061 : 1995
Indian Standard
BICYCLE-FRONTFORKS- SPECIFICATION
(F irst Revision )
1 SCOPE 7 TESTS
sihT dradnats srevoc the tuemeriuqer for the tuorf forks 7.1 Acceptance Tests
desu ni 4 sezis of ,selcycib ,yleman 45,50,55 dna 60.
7.1.1 Load Test
2 REFERENCES
ehT fork shah eb depmalc ,yldigir as uwohs ni .giF 2,
ehT gniwollof naidnI sdradnatS are yrassecen stcnujda sti mets htiw sti sixa guieb kept latjloziroh dua the
on
ot siht :dradnats fork sduc denrut sdrawpu gnipeek the fork uworc raelc
of the pmalc swaj yb 8 .mm A lacitrev daol llahs eb
SI No. eltiT
deilppa uo the fork ,sdne tsuj where the tnorf leehw elxa
:315 1994 dellor-dloC wol uobrac leets sheets si ot eb dettif so that the daol acts htob sduc .yllauqe
on
dua spirts (fourth revision) ehT daol llahs eb desaercni litnu ti reaches 45 kg. ehT
fork llahs eb kept ni siht dedaol state for 30 .sdnoces
2039 (Parts 1 ot :)3 leetS sebut for elcycib dna elcyc
ehT fork llahs tou show a tnenamrep set of erom naht
1991 swahskcir (second revision)
1.6 mm at the tniop of .gnidaol
:8012 1977 traehkcalB elbaellam uori gnitsac
7.1.2 Expnsion Test
(first revision)
2927 : 1975 noitacificepS fcr guizarb syolla ehT ecnatsid neewteb the free sduc of fork ,sgel uehw
(first revisidn) dednapxe yb 13 mm yb gnihsup meht revo a lerduam
or yua elbatius .ecived llahs ton show yua elbarusaem
3 MATERIAL tueuamrep esaercni reduu yranidro sdohtem of -saem
.tnemeru
3.1 kroF umuloc dua fork sedalb llahs eb edam moT
sebut guinnofuoc ot grade noitangised lC-WRE or 7.1.3 Test of Finish
lstraP(9302SIfogC-WRE :)3ot 1991.
7.1.3.1 dilosA leets ,llab ghrusaem 13 mm ni ,retemaid
3.2 kroF sreuil llahs eb edam of dlim leets htiw ruhplus
llahs eb dropped morf a thgieh of 1.5 sertem 011 yua
dua surohysohy stnetnoc ton 60.Oguideecxe tuecrep each.
detuiap noitrop of thr. fork. ehT tuiay at the ecalp where
3.3 kroF uworc llahs eb edam of leets of DD grade of the leets llab sekirts llahs duats siht test tuohtiw -wohs
SI 513 : 1994 or elbaellam cast iron conforming to gni yua ngis of tear or gnileep off.
grade MB 340 of Si 2108 : 1977.
7.1.3.2 Chemical test
4 SNOISNEMID
ehT detniap gel of the fork llahs eb deppid for euo ruoh
ehT forks llahs mrofnoc ot ehl suoisuemid dua -uarelot ni a 5 tuecrey muidos edirolhc uoitulos at the -arepmet
ces nevig ni .giF 1 dua those deificeps ni SI 2039 (Parts serut deificeps .woleb ehT tniap llahs ton ,netfos leep
1 ot 3) : 1991. off or show ylla elbaicerppa eguahc ni :edahs
5 MANUFACTURE AND FINISH a) devotS kcalb lemaue xo”c
5.1 ehT mets dua the two sgel of the fork llahs eb dettif )b devotS lemaue other uaht kcalb C°06
ylerauqs hguorht srenil otni the fork ,uworc dua the
7.1.4 Impcrct Test (Fulling Mras)
stnioj 1I~.+. eb ylreporp dezarb htiw redlos guimrofuoc
ot edarG B of SI 2927 : 1975. ehT sgel llahs eb -mys nehW tested yb the dohtem nevig ni 7.1.4.1, there llahs
lacirtem htiw the ertuec euil of the .mets ehT sixa of the eb on elbisiv ecnedive of ,erutcarf dna the tnenalnrep
buh llahs eb lellarap dua .erauqs ehT threads llahs eb so noitamrofed of the, ,ylbmessa derusaem neewteb the
dennof as ot etatilicaf ysae gnittif dua .tuemecalyer ertnec senil of the ,elxa llahs toll exceed 40 .mn
5.2 ehT fork llahs eb ylhguoroht ,denaelc defoorp-tsur
7.1.4.1 Method
dua ylbatius .dehsinif
sihT test llahs eb detcudnoc no a emarf )seidaL/stneG(
6 SAMPLING
dua fork .ylbmessa erehW a emarf si elbatrevnoc for
roF tests IIO the dehsiuif forks, the elacs of gnilpmas elam dlla elamef sredir yb the lavomer fo a ,rab ti llahs
llahs eb as agreed ot urevsteb the resahcrup dua the eb tested htiw the rab .devomer
.reilppus ehT rcuatsid lleewtcb the elxa senil-ertoec ld;h5 XI
IS 2061 : 1995
LENGTH TO TIUS
ELDNAH RAB
METS
t
k DETAIL A
YLBATIUS REINFORCED
‘1; EITHER BUTTED OR
‘.\\ PROVIDED WITH LINERS
EPAHS‘ OF CROWN
(OPTIONAL)
LPl6 1 &PI6
P = 1.06
MAJOR DIA = 25.400~!.I70
FOR BUH GNIVAH CONE TO CONE
EFFECTIVE DIA = 24.66&,,
MINOR DlA = 24.2,2 -&,
FORM OF THREAD
NOTES
1 This figure does not specify any design details.
2 Other threads nlay be permitted as per agreement behveen the purchaser and the supplier.
All dimensions in millimetres.
FIG. 1 FRONTF ORK( SCHEMATIC )
2
1s 2061 : 1995
45 kg
DAOL
.GIF 2 DAOL TESTO NF OKK
measured. A wol ssani ,rellor 1 kg ,xnM llahs eb -sa ot the seat .rallip ehT ylbmessa llahs eb rotated tuoba
ni the tnorf fork, dna the krof/emarf ylbmessa the rear elxa so that the ertnec of ytivarg of the 70 kg
se~~dhxl
dleh yllacitrev dna depnlalc ot a digir erutxif yb the rear ssalc si yllacitrev evoba the rear elxa dna neht dewolla
elxa tnemhcatta stniop as ni .giF 3. ot llaf yleerf ot tcpllli the livua (see .giF 4).
S~OWJJ OII
A ssalc of 22.5 kg llahs eb dropped yllacitrev hguorht ehT test llahs eb repeated ot cdivory a latot owl’lo hcus
a thgieh of 180 as ot ekirts the ssam-wol rellor .stcapmi
111111s o
at a tlliop htiw the leehw sertnec dna tsniaga the
ill line 8 GNIKRAM
noitcerid of the fork rake.
8.1 ehT fork llahs raeb the ecruos of s’rcrutcafunaln
7.1.5 Impnct Test (Fnlling FmmelFork AssetnDly)
,elnan slaitini or deretsiger kram-edart dna yrtnuoc of
nehW tested yb the dohteln nevig tri 7.1.5.1, there llahs .nigiro
eb JW visible evidence of fracture. 8.2 SIU Certitication Marking
7.1.5.1 Method
ehT tcudorp yaln osla eb dekraur htiw dradnatS Mark.
ehT test llahs eb detcudnoc the rrllor/krof/e~narf
OJI 8.2.1 ehT esu of the dradnatS Mark si denrevog yb the
yldessa desu for the test ni 7.1.4.1.
snoisivorp of the uaeruB naidnlfo sdradnatS ,tcA h;r)9I
ehT ylblnessa llahs eb detnuonl at the rear elxa -hcatta dna the seluR dna snoitalugeR .rcdllucrcht citT
~nadc
tnem stniop so that ti si free ot rotate tuoba the rear ,elxa sliated snoitidnocfo rednu hcihw thr >nnccit for the CSU
ni a lacitrev .enalp ehT tnorf fork llahs eb detroppus yb of dradnatS Mark yaln eb detnarg ot the srcrutca’luna~n
a talt leets livna so that the elnarf si ni sti lalnrnn or srecudorp yaln he deniatbo tnorf the uaeruB uaidltl‘fo
noitisop of .CSU A of 70 kg llahs eb yleruces dexif .sdradnatS
JJJ~SS
3
IS 2061 : 1995
PERMANENT
- MASS ROLLER,
WHEELBASE
GID MOUNTING FOR REAR
XLE ATTACHMENT POINT
All dimensionsi n millinwtres.
FIG. 3 IMPACT TSFT ( GNILLAF SSAM )
4
