2. 1 • SCOrp.
This Japanese Industrial Standard specifies the general conveyor belts with
'cover rubber using single or multiple cloth core, hereinafter referred to as the
, "1JcIt" to be used at belt slJrfClce temperature in the rall?,e -30 to • SO°C.
lIowever, there are excluded those for specllli us,lge such as ilCill resistant, low
temperature resistant, oil resistant, acid resistant. alkali rcsisUlIlI. food
tr~1f1sportlng, flame resistant, personal transportiin!S. for backe!. C()llveyor, etc.
The units and numerical values given in ( ) ill t his Standard arc
In accordance with the draditional system of units Jilt! are Standard
values.
For the purpose of this standard, the follOWing definitiorl~; apply. Other muin
terms and definitions are given in JIS K 6200.
(3) Angle of Inclination betwc'en centrill hcrizontal roller and
ends (see Fig. I).
Fig. 1. Trough Angle (ExDlllple of Three Carrier Rcllcrs)
"
The bells shall be classified according to tll,: nominal belt ~tr€'llgth. belt width
:lnd performa'nce of cover rubber and shall be cOrTtbined from ttlP. dnta given In
Table 1.
Applicable Standards, Corresponding International Standards aile!
. I~cference Standards: See page 23. '.
3. T<lblc l. CI<lsslficatlon of Delts '
Division C!asslf le<ltion
/'
~OO 125 IGO 250 315 ~()(} SOO G30'
Nominal belt strength
800 1000 1250 1500 1800 ;W()() 2500 3150
:100 350 400 450 500 GOO 750 800
.-
Uelt width tnll1 900 1000 1050 1200 1~OO 150ll IGOO 1800
2000 2200 2400 2600 2800 3000
Performance of cover
L, G,S, /'rubber
. .,
4.1 Appearance
to use.
4.2.1 Performance of Cover Rubber Tile performHnce of cover rubber
shall be test€ld according to 8;.4 to 8.7 und sl1<lll CO/llll1y' with the specificntlons
gIven In Table 2.
4. Performance of cover rubber
Test item
L G S A
I
Tensile strength MPa . 7.85 13.73 17.65 13.73
Before
( kgflcmL) f80} min. (140) min. I ( 130) min. {l40} min.
I
aging J
Elongation % 300 min. 400 min. 450 min. I 400 min.
Tensi!e
test Change rate of
within :t 25 ...••.ithin :: 25% within :t 40 within :t 30
After
tensile strength
I
aging
Change rate of
% within witin :t 30 within! 25 withb :t 25
elongation
! 40
To be free
I
1 To be freeOzor. deterioration test - - from cracks from cracks
..A.braSlOn
test
5. 4.2.2 Performance of Ply Construction. The performance of ply construe:io!! sh.all be ·tested according to
8.8 nnd shall comply with the specifications given in Table 3.'
Nomina.1 belt strength
.. 100 125 160 3JS
400
'"
500 6302~0
- . -
Tensile strength kN/m 98.1 123 157 245 309 392 490 618
-. (kgf/cm} (l00} {125}' (160 } {250} {31S} (400} (SOD} (630}
-.
min. min. min. min. min. min. "min. min.
Tensile At the time stres-
test sed by 10 % of '.
4 max. .,
Elongation tensile strength
~
At the time of"
rupture
10 min.
Nominal belt strength 800 1000 1250 1500
I 1800
I 2000
I 2500 3150
I Tensile strength kN/m 785 981 1226 1471
I
1765 1961 2452 30S9
I
{kgf!.cm} (SOO} {1000} {l250} {I500} {lSOO} (2000 } {2500} (3150:-
I min. min. min. min. min. min. min. min.
Tensile
I . At the time stres-
test I Elongation
sed by. 10 ?,; of 4 max. l
1
tensile strength -,
I
~
." At the time ofI .Irupture
6. L.;;;;;;;:;;;;;=::::::=~> ~==::::::================- .
4.2.3 Adhesion PerfOTr.1anCe The adr.esion pe:io~m2nce sr.all be tes:ed accC'iding tJ 3.9 and S~2!l ccmply
with the specifications given in T3b:e 4.
'100 to 500 630 to 3150
Nominal belt strength
IMean value Minimum value l1ean value Minimum value
Cover rubber and ply in
- -thickness under 1.0 mm
Peel
Cover rubber and ply instre:lgth
thickness 1.0 mm and over 1.96 {5) min. 1.57 (4} min. 3.14 {S} min. 1.95 {5l min.
up to 3.0 rnm excl.
k~/m
Cover rubber and ply in
I[ kgf/25 mm}
thicbess 3.0 2.35 {5} min. 1.57 {4} min. 3.53 {9} min. 2.35 {51 min.mm or over
I
-'.. .- ~ _1 •. .......~ ,,.., - I . ,. ,.,.." ~ ,'" -.- I - - . .-'I r lJ ClllU tJl),
C1
W
N
N to"
I
•...t.O
00
00
7. · (i
G:J:!:!-/!J88
4.2.4 Trou h Per(ornlDllce The trough performance shall be represented
by the trougll 11 ex ('1') etenn ned by the ratio of deflection of belt to belt width.
The value of IndlVlduai, trough Index shall be tested accordIng to 8.10 and shall
c~mpl)' with the specifications given In Table G. ,'.,'
Table 5. Trough Performtlnce
'r
Trough angle ( .)
Trollgh Inuex 7'
20 max.
0.08 min.
25 Illax.
0.10 min.
30 Illax.
0.12 In In.
35 I1lDX.
0.14 IIIln.
40 lIlax.
0.1 G min.
1/5 I11<1X.
0.18 111111."
55 rnnx.
0.23 lIlill.
GO 111<1X •
0.2G 1lI111.
4.2.5 Llneallty of Delts The Ilne(]lIty of belt shall be Lested accordIng
to 8.11 and shall comply wll!l the spcclflcntlons glvcll In Tuble G.
Table G. LlllcnllLy of Bclt
Dlvislol1 by belt wIdth and belt Icngth
Permissible 'cJevlatJon
value of lineallty
Delts in width 450 nUll,.max. or In length 20 1Il max.
IJclts in wIdth over 450' mm and In length over 20 In
5. Structure
5. J Settl~'naJ Structure of' Delts An eXcllllplc of the sectioned structurc of
belt and tbe designatlon of every part ore show II In Fig. 2.
8. !,
/:./
l
I
I'f
fl-
I
j
7
1< 6322-1988
rig. 2•. Sectional Structure of Delt (Example of Delt of
Multiple Plies and with Selvnge Rubber)
b
,I
,
J
/,
:::::=~:='=i.:::::~:= =;;c.
Under cover rubber '-PlY
11 ; bell width (mm)
I : belt thickness (111111)·
I, ; thickness or upper cover rubber (1I1l1ll
I, : lhlckllt:ss u: under cover rubber (mm·~
S.2 Nominal Belt Strength and Maximum Numt·er of Plies The'l1onin<l1 belt
:;lrcngth nnJ maximum nUllluer of plies shall be as given in Table 7..
1~50 ;;;.i lllUUJ ~ow12~O/3150
6
Nomlnlll bell 100
strength
r-lllxirnum number € 3ol plies
5.3 Joints of Plies
In the Case of MultIple Piles The llwxilllum number of positions
of joln~s {or length of ply shall be as given in T,1hlc 8. The Joint
<illgle shall be 45 to 70· to the longitudInal direction. T~lC dIstance
between Joints In the same ply shall be 5 m or over and :.he Joint
to joint in the different ply shall b,~ separated by twice or more of
belt wIdth. In this case, the JoInt positions shall be separated by
7 m or over from the ends of belt. 'f
(2) In the Case of Single Ply . The joint for length shouhl not be
conducted as far as possible
In the CflSC of cnrrying out Joinl. It shall be cilrricd out according
to f.uch method that its performanc(~ on Its use is not damaged and
the number of positions shall be as gIven in Table 8.
9. ""
l,J4' , t'11I1l.! P Ie ply
Delt lellgLl III ~illl:1e ply
~l''''
Outer pl'l t I ) Inller i>ly
. ------.-
100 ond under 1 2 I
Ovcr 100 to 200 Incl. 2 -I 2
Over 200 to 300 Incl. 3 G 3
'r
Over 300 to 400 Incl. 4 8 4
Notes (I)
el
The outer ply IllCOllS the uppermost ply allu UnUCrI110~;t ply,
The Inner ply mcans any lnterlllediutc ply other t.IWII outer piles.
The IIwximulll' number of joint positions In the ca~;c (~xc:cedlng 400 III
shall be tile speciflcntlols of Tnulc 8 udtleu 'uy I III outer ply, 2 ill
Inner 'ply and by 1 In single ply In every excess by J 00 m.
5.3.2 Joints for Width of Plies The maximum number or joint positions
permissible for belt wIdth III every. ply shall uc ns glvcn ill Tc:Jl>lc 9. III this case,
coch jolnt"shall be separated by 100 hlln or over.froin the JoIllts III dlffcrelJt ply
and the Joint ·lInes shall not be open by 10 mrn or over.
I Ovcr 300 to I Ovcr 600 to Over 1200 to Over 1500 toUc J t IV Id t h nun
600 Incl. I
1200 In<:l. 1500 Inc/. :1000 Inc/.I
Maximum number
I
I ./
of Joint positions
:1 1
Thc dimensions of belts nlll! tolenll1ccs shall be I1lc(lsurcd <.lccoruing to 8.3 alld
sllDIl.comply with the spec1flcntions of G.l to GA.
G.l Delt Widths nnd Tolerances
as gIven In Table '10.
11. itA~
)0
G322· 1~~a,~:
-- --.·----I1-~-IL-l-L!-Il-g-l.I--·--·-------,·· ['-'---"'--'-~d, ·rjllC.'(~--- __ .I..---
Unuer I:; III
15 m to :-.0 " cxcl.
I '1t) be IlldkaLed ICllgLil ur Ilver
)
____________________ ..L..- . _
Hem;!rl: Tile illdlcntcd lCllgLI1 of C:t.J:Ui3 bell. lllCollS iLs cCIlLrnl
clrClI1l1 fercllCc.
r.J 'Jlllf~ of Delt l'hl~I<IIL'!;S /s f'Jr the IJllifol:lill.y uf hell lillcl<llcss, thc
l! iI (t: re !'cebct wee ililiC-,11<lX1ii:-~<if1<.l II;c Illllii !:·.1I111 I) f I :ICilswCL! va Illes :;Iwll be
III if) % of t.h,~ rne<tli valu3. :il this c;]~,~, ns fut· !Jell !lose lllenll '<llllC IF ; Ii
,:' t· ~/, ~l'ltk:, tll'; di{(cj'l~nce !;lwll li!~ 1 ;1111;or 1,lIlder.
G.4 'l'olerullcr. UI Tlllc.knesfi of ~"J'!'-:r ~:J:,l.l("· Th,~ LUll :'dilce for Illl: ltldlcnted
til' .~f1C,.:;··)Tcov~"i,ruIJl!tr sll[l!TlJ"ea3-i~Cve,io:' 'i'0~.je )~.
';".~r:.H!S t.r. U·· ,;sed
......- --,-,-' '
7.J l:lpfh Tile tlvtl1 51'illl be c:" l!;tlL'clcJ ~JII:l:1 or [)" COIIIl>illillg 01 Lile
;n,:'Jrnl 'ilber ~nc cllend::nl {her.
7.'L l(ul',ocr. Th~' (ubbe: shull b~) ce,nsU,ltecl )f the Ilcltural l'ubbrJr. synthetic
rllli~I~I'. corripoun<.'lng 11'1<re(lle'lls, etc,
8.1 Sar~ 'l';1'e SCllrpiing SI.:;',! be co :J~ldtiJ IJI1 1Illll1bcr given III TobIe 13
·nc~ordingt.Ofhc lengllJ. of ~very ~,~ oi bc1t~. Olle I·Yt referrcd Lo 1t(;lcin Iliec.IIIS
. Lh0~e prodilect!.' under tl1e ~B'f1(;l cUlluiLiollS <In',; :oart:!" 1'1 Lite classifico(.jIJll llf belL ;,::d
dilncnsions. ollieI' than lengtl·,
12. 1 1
K 6322-l!J88
Length of one lot of belts rn S,lmpling number (pieces)
. 500 and under .-JJJ .•..•......,..•.....
OVf~r 500 to 1000 incl. 2
Over 1000 to 2000 Incl. J
"
Over 2000 to 3500 incl. <1
Over 3500 to SOOO incl. S
Over 5000 to 7000 Incl. (j
Over 7000 to 10000 incl. 7
Remark: ,When the length of one lc,t of belts exceeds
10000 m, one piece shall be added for e':ery 3000 m.
Further, the size of sample sholl bc thnt
enabling necessary tests.
8.2 ,ConditionIng of Sam~ The sumple shall be, in gen(~ral, thm:e which have
elapsed by 24 h or more after vulcanization ond shnll be held in (l room of standard
atmosphere of 20·1~·C for one hour or over before test.
,
8.3 ,Measurement of Dimensions
accordfng to the followTng methoos.
, .
B.3.l Measurement of nelt WIdth MC.:lsurc the belt width Dt both ends
and optjon.a~J position(s) of belt.
: ;....t..J- 1'1",,-
~ . 8.3.2 Measurement of Dell Lcngtll MI:aSlJre the belt length ,,between both
~ I ends of belt. In this case, DS for the endless b<~lt, place the belt on plnne place
.as shown in Fig. 3, Illark so as to be Q[j =cd to measure the lengt.h .05, then move
the belt to measure the lengths of ;;C and bd and calculate the centred
circumference o.f belt (L) by the following formula.
~_i _1_B_ell 1 2_2L.
Id
8.3.3 Measurement of Dell ThIckness Measure ,the thickness at belt at
one end at the positions shown in Fig. 4 and record tile maximum, minimum .and
rnenn values.
".'il
....}'
13. /.: '
1 1/l/,:-!~.;;
;,.:1.·1 flil',ISlIl'CllIl'li', I"lril
:l<ll!'SS O( ':CVCI' Il1Ihl'el' ,'I.', (1I1' 111l! IIW;ISIII'(~II/(~1I1
o~ J,ver rUlJlJer.-meastirC-~1f I,ii(~ ~~i'i«(';)r~iiiij)r(:-;llTTe-i;;'lli"II~silown 111 Fig. ,I tile
t;liclmcss 'Jf tIpper e(lVer ruubcl' «,) tlild of u,I<,kr C(lVC'! l'uulJcr (I:) so as not '0
L'rl~,ll< tile bl:lt :jll<l rt~prcscllt by Ille":1 /)' ~u< 'II c(~cll. !Il i i1j~i cnse, rllC<lSlIre Ille
til!cl,flcss III l'OI':'1' I'll'lllcl' (rolll I ill' Illp "':IV(' .eliI'll, flf I'I.' III 1/1(' ~'llrr;IC"(" (If Ill,ll
:.1!It! reprc,;cII' /),' IIle; ,I v;l!u,.: ill e,lcll " .•.,•..,.' .." .i: .
1,I
;~
t
~.
I:(I;. 'I. MCll~',:ri IIg [:s itiOIl~ (;( I,kIt TIii cI;IJ l:~li
:11111TII!l-ilIC:::, 1I( 011'('1" UIlIJi".1'
:. '~: ' , "-1
[---1----- ---_..1- -- __ .._/_..'_ ..
f ::::~""'.----.>4.-''''''>': ' . ' .- "~~'~~::::::::-~:::::::::::::::::':::::::::::::::,:-.:-
I --:. •~,",,-....-- o· , '"-.••..••••- •.•••.••'~ •• <.r ••
I ~-:--!-- - -'-'f---.---t'.- ._.....---I Ibol!. : 1:".:, ' . illllllt I '!"1I1 .•
fO --' -"---- .• / .• ..:..1 • _ •• ~ ••••• _-_.:, •. "
,I
~ lie I I ! JI l:nder :' ,',: 011111 '."
--- '_._---- . ----._ .. __ ._-- ._----_.
-"~"': ~1(,.1~llrIIlK Pll~/li(J1I
....•...:~
i
,..-._---.-.---- :J •.:;( ' i,I~" JOOO p',nl lI~jl.
'" ._-_._-- -. -----~._--- _. "'- -'-'
8.4 Tensile ':-est o~' Cover RUlJ[pr tS [or Llle tf~lIsil(: test or cO'/er rubber,
take 1I,r-:e dulii/i lei I N~i:J"T,'i)e-TesT !)iece.:; :;p.t'd fieri III 3. ,)( ./1S I( (i:JO 1- J 97!i 'fn lill
lIIJ))el' alld lIllde!" Cove;· rublx r,'; r-f~'.::l~d :if( r.~ I)ptiolllli pusiU()1I of Sillllple In
IOllgi tudlnal din.:, ,tlOII ::rt caell (llld eC';l,luct 'lc;:)l'ding t 0 t11(~IlIcUlod sP~cf(lcd in :l.
cr JIS 1: 6101 s,:parat ~Iy (01' tile Upper Jlld Ul1cJn cov~r nib/wI'''.
Further, t:· ~ IJpp::r (lilt! UII<'>:' [ace., ·A le~;t pi"el' IIIi II' 1)(' "III Of' polished to(iII is /I <; TTl00 [h IY:;
14. i
, '
,
I
I
.i
,
I.,,
I",.' 1
I
I
I
'.
I
i
.J
13
1< 6322-1088
,C1 • .'i 0.!~~ Test of r.()vp.:..r~!..hh('~ 15 fM thl! aGinG test of r.()v~r rqhber, take
tcst ricr.~s in th~ slime rnanner JS in 8.<1 flnd cOflduct the ;]ccc!cr<ltcd Dging at 70
: I ~C conl.inuousJy for 1GB h lIccordlng to the mnllod specltled In 6.3 of JIS J<
r.:10 I ilnd then conduct the tensile test or 8.4 to CJlcuJi:ltc th~ ch;lI1gc rate
;I((urdill~; to the foilowing formulJ: .~" .
l'
/1, ~ X,:;X~>:'IOO
J •
where Ar : c!lt1l1ge r.1tc of tcnsile strength, elllllL;2.lion after agingilgLlin~;t thJt t)C fore aging (%)
X, : tensIle ~trellHIIl (T" :', elUliga lIoll ( [.: befure agIng
" . tensile strength (T. ), elongation (F ) "fter aging
J , •
8.G 07.on Deterioration Test of Cover Rubber ,:; fo:~ the o;:on deteriorlltion
("st of G)ver rubber, t:Jl<e 2'-aurnbbCIfNo:J---ipc tcst picce specified in 3. of JIS
1 fiJOI in each from Upper and under cover rubb<lrs peeled off ,1t opt.lonal position
1)( srlmplc in longitudinal direction and conduct according to I.he rnethod specified
if! Hi. of .IrS I( 6301. III tlli!; C(lSC, take Ozon cc·ncentration (l" 0.5 ~ 0.05 ppm (50
.!. oS pplim), tempernture 05 40 ± 2°1., elongntion 2,1 %, cxrosure ! irn(' ;"Ie; 24 hand
ohsr.rve visually the sUite of cr'lcks.
13.7 itJration Test of Cover Rubber Conduct. the abrasion test of. cover rubber
:lccordirig" to Appendix. In this casc. sample lhe test ricces <It optional position
of upper face of cover ruhber and represent the test result by the mean value.
8.8 Tensile Test of Ply Construction Conduct the tensik test of ply
.construction according to the7Ollowing methods in the state of fill! thickness as
it is. In this case. the cover rubber may be removed.
8.8.1 Test Pieces As [or the test pIeces, sample the test piece of any
one type of type A, type n and type T shown in Fig. 5 at the site distant 50 mm
or over to inside from tile ends of both selvage rubbers to preptlre .3 pieces. The
IOllBiludi11il1 (lxis of test piece shall be parallel to the longltudlf1<l1 dfrectlon of belt
and l he lest piece Slltlll not Include Join t of ply.
15. Fig. 5. Form of Test Pieces
V
"
,
Unit:
.•..~
mm ,
Posllon to bc
(
ellc-:hed to the ' .. '.'
:~
grip of tensile
~
testing machlnc .;i'
~~---..
I I
I I
Type A
I I
I I .~
V)
,.....
~15t,nce hetween
~c...!.....:~ks 100. ;;;,50
----~
no . 2 Urles the grip length
-+
~ ~i/!I '
Dlstonce betwcen
bench mnrks 200
"
l'(lslLion to he ottoched
to the grip' or tensile
tes[irll( rriuchlnc
IO-J-
I'os /110/1 to I.>cattoched
to the Crl~.or tensile
tesll'lg machine
;--;-
-t I
I I
I I
I I
I I
I ~ 50 I
t4 • f
I I
I " I
8.8.2 Testing Machine Tile test illg IIl<1cllinc shall be equipped wilh ll~ ~
indicating device of lllaxll1lul1l loau <111Usllelll be o[ Cl lllcchnnisl,ll equipped wllh
gripps able to fix test piece olltollwticnlly. Tile Inllximlll1l 10<1(ill tile lillie 01 1e1t.
shrill be IS to 85 % of indicated scale of testillg llluicllinL:. ]
, .'i
(;
.
16. 15
1 G322-1988
., "'1 Test Met.It"" roll' the IClu;ile 1•.'.';(. u( ply cOllslruction, use the test
"j"", (It ,11)' ')ll~'- t~i)COr'111"';(' r.pcci fied In ~U,.I, "t lach the t(~st piece to the grip
l:c,rrrclly so t.h:lt tile test plcc.~ may not gencr,ltl.: WClrp, cut IJy grip; slip and other
t rl)1I1J lcs rillri nc tcst, conduct t.he test at n speed 0 f tes t iiJg r(l te of 100 ! 10
rnrn/rnill nlld rend out t.he elon~Cttion at 10 ~ of tcn~ile strengt:l (s well liS the
11:I'illlurn 'lo:ld (llld clollg.1tion until the tCf>L l'iet:'c is hroken. ll;.)vevpr. in the case
where the belt strength is laree and cut by grip, slip or capJcity ill~;lIfflclency are
'~l'r,~rJlcd. it is pcnnittcd to test by dividing the test picce ill two Ul the direction
·,f lhicl.;11C~;S to test. In this easc. the dlffcrcllc{: hdwccn divl ..Icd r'umhrrs of plies
.-;11,11 he wit.hin 1.
!: n.,1 Arrll'lZCI1H'llt of Test R~sulta '1'ilc: test rc;,ults shall he represenled
"J ll,,' 11I.:',l11 V<1!uc;-·07-i!ic·a:·:·urEcr·v;11IJCSO!-tllrcc tc:~;l lJj(~I:es. 111 lilt: CilSO where the:
t~:;t hilS been conducted l>y dividing Into t.wo pJrls, this r~ct i:; described ill a note
i'lnc1 tile t (:sl. result' sh311 b~ represented by the :ililll ()f .lI1ei1surc~1 V,IlIICS on the G
11':,1 pi,' '~:~.()I)I.<1int:d l'l' dividillg ililo twu by dividillg by J ..
(" ..,I,r:,j"n T,..·~t As for the ilddhesion test, somplc :,::;t !«;,:,':; ill width 2S
, I'.;, ':1" 'illLl"i~r~~20() Illffl l~r over consi:)tin~ of two t;tyers ()f t;'wcr rubber anu
ply JIllI ply ;)nd ply in cdch at the position dist •.•r,l SO mill or I)v(;r !'J'OlIl CllUS of
!)t)tl1 ~C'IV"'lg~ ~ides to in:;ide u( ply of s:llnple excluding joints of ply, peel off a
ljltll~ tlte adlll:sive layer in longitudinal dircclion :It. one enu alld th,'l1 dct~rrnine the
!lcel strength frorn tlte peeling load of cach adhc!ive Irtycr Hc,:()rdin~: 10 7.4 of JIS
1 (i]O I wllll tensile speed of 50 .!: 2.S 111m/min.
[' 'I, he:r, for the peeling of ply and cover rubl)(~r, the ClIver rucl:'cr shalL.bc
clipped by the upper grip of testing machine. The peel length shall ')e so lo!'!g as
.)l;1c lO ubtain at least 8 maximum value of peclillR load. A~ for t~~'it results~;
c~Xr:lllclc, Rt least 3 initial maximum values and record the mean vnILl': and minimum
v~duc of the rcmnining at lcast 5 maximum vallie.
F..IO Troug~l~erformance Test In the trough p~rformance tc:;t, sample two
;'cctilngks WilflDCTfv~~idiJi-m-rlcf length I ~o ! ~ mOl In full r/llclmc:i:; at one end
of sample to take as test pieces. Turn the upper .'jllrface up ward, j;t'lp the 4
c()rfJcr~ correctly by Sus[wlltling tools of test dcvl,:e and hang the te~;~. piece so thnt
I h,: $;:;j.lenclillll tools I'lIny be vertlcill (t;ee Fig. G). Measure tile ddlel.:tion of
cClllr;11 part (F) after 5 rnin have elapsed from tlte time when the sLlspending tools
11C1ve l.tt:collle verticCll. Delerllli lle the mea n val ue 0 f t wn tes l pieces to enlcu III te
the l roul:T, index accordin,~ to the following forr11l.;}a.
7' = P/..
17. Ifj
I( G:J£L-l ~JHH
SU~PClltJlllt;
001
~/. Tr<Jllsvcrsc ·Girr
8.11 MC1~rell.lCnt (~LJ.~~<:lllty of nelt Is for tlte measurcment of IIneallly·
of belt In lOilglllidiiWTdlrectlun, extcnd tlte belt on n plllnc surface so as to be
free from unevenness Hlld stretch the thrcad of Icngth 7 III all belt selvage 8S
shown III fig. 7 Qt optional position to measure the deflection of belt (';). 111 lhe
case where the lellgtll Is 20 111 ur ullder or tllC belt widLlI is 4~O 1I111l or uncler, lilkt'
the length of stretched thread <JS 5 Ill.
."
'.:; !,;,,~;':, '.~.~
Remark: The numcrical values In ( ) arc for th~ case
where the belt length Is 20 III or unuer or the
belt width Is 450 mIn or under, anu t1ie length
of stretched thrend Is to be tnken CIS 5 tn.
,
..,
." ':'.'~;
18. 17
I( 6322-1988
The designation of belt shall be carried out. by nominal bdt strength
performance of cover rubber: belt width (mm) x number of plies x thickness of
upper cover rubber (mm) x thickness of under cc,ver rubber (10m) x belt length (m)
in this sequence.
.,
Ex(mple:l" I 1000 - S 1200 )( :1 P x 6 x :J x 200
NOmina~1t II
I
T 1 -I-I
Del t Thickness o(
I [kIt
strength width upper cover
I
.~ngth
rubber
I
Pprformance Numbcr Tllicklit'ss' 0(
o cover o( plje~ under cover
rubbc r rubL',' r
.;
'>Ii ..
.'~
Upper or under surface of belt shntl be markcd with lhe (allowing items at
intervals 25 m or under.
(a) Nomif1nl belt strength or Its abridgement
(b) Month and year of manufacture or it:; abridgement
(2) In the case of package, the surface shall be JIlackeu witll tlle following
items"
19. I
I
I
,
t
)!
,~I
,
I .;'t.
"...
I '~ ~lJrc~.~., of covr,r rulJlxr uy this test deslgllatcs ,'I,. olul11c loss of test
,)i :e ' "'11 the test ,)Iccc of co'cr rubl>cr hus b'.~cn nbrnsed by l'oLDL!ng cylinder
't:l!!lr1 I' ..l)raslvc cbth.
FU1~~H'r, the nbrasloll performal1ce of aul iisivc cloth to iJe uscd 111 this test
slw!l be represented by the mtlss loss In the c()se where the ~t,ilncJarti sample has
been i1lJrased bv thCJI; nbrasive cloth.
2.1 Fortn old pr'~llaraioll of Test Plec~!i.-of Cover Hubl>er The l.e·st piece
shall be of the tITSC s wpe- wllh ;]lal11et~rCU3 mm)and t..1ickness G 111111 OLQY~L'l!1.d
cut_9ff JJy hollow dl'ill'.,w1t!l in~ld.~ _c)i~!n!?t~r..1G.2 :t O.O~ ..DUlL In this case, the,
drilled t~st piece shil11 !lot be u~;ed but t11-3 test pIece vulcrtnlsed III a mold of
Inside dlnrrlCtel J,G,? ± 0.05 111m linder the some conditio;, as t1'i.lt or cover rubber
mny be l5ed~' ,
Further, il~ the case where the test piece In Ilece;isar)' lilicklll~SS is not
obtained, the (e~t pleco r.lny be adhered t,) an aJequate ba~e Lo th~ deflped
thickness but Ihis tf:st pkce shall not [:,(; rJbrased to the adhered I<wer. In the
case where tlw, pro(~uct Illcludilll~ ply (pllesi is tested, it shall lIot 'b'e'obrased to
th~ ply.' • I , ~
:.2 I'-!urnber or' Test Pieces
upper co'er n'bber.
:3. :~~_t~>.e'lce and Prepar3t1on
:.t.t iJevlce The tespng devlc~ :s she;. n in Jppendlx Fig. 1. The body
',;ts ~oT1B~lOta()le hodzont;t1 cyllndp.r (the !urface.',ls wound witll abrasive
,:~ and t~:..t piece grip. The dialllet,-r of cylinder stlall be 150 :!: 0.2 mm~nd
the .1ullIber of r~volutlon shall l,e 40 1: 1 luin' (4'J ± I,rpm). The revolutlqn,oC
cyllnder'shall be clocl<wlse whe I It Is luul<c;d (rum left end. The test plec~ gr!p
shall be attacilCd to t1!(l arrn slpport(~d by ::1 ~ SU~i)Orter su <.IS able to rotat~, am!
further, In till: case where the test pi ~ce l!i ~,ot attaclred,' the IQw(~r ell~ of ,grip
•. , contacts sllgh::lY. witll' tlie"abraslve scrfnce~lId 'tl)C req'tral axis 'of' grip f1( lilli;' Lillie
'sll'<:111be inc!l/led by 3 degrecs 10 the 11:;-pcnu','I:!nr passing Lhrougl the centre o(
cyJlnder (Llngl! when the top cI'd of grip e~~kJerl test piece cUIlL lets l,~le cylinderl
I •. ,'ll'.slde. '
20. ·~.
;
J,;-!'
~I I
. "I
l
i~~
:..•·1
I : .•~:
'I (
19
1< 6322-1988
Afil(~ntlJx FIr;. 1. D~vlc~ (or
/ur,blUI Te:;L
Apf1CIHlix l:i!~.·) I'o:;illoll If
'; (':r. hc~~ Grip
Tile grIp slJJll move correctly parallel to the rot<.ltiollal nxis of cylinder. The
...•• ;. (,If iHl1l alll! grip shall be determincd so tll:1t the lc:;t piece n";:sy press the
uPDer side of abrasive cloth by a force 10 .: 2 N (1.02 :t 0.02 kgf).
r~;,1 il'g the test, t11~ tr:lVclling amount In lateral directIon of grIp shall be 4.2
, U.U4 Jillil per one rotation of cylinder, when tM cyllnder rotates LInd comes to tile
~"Yilt inn ,j( <1uraslve cloth pre:.scr, the tcst piece shall be ralscd for a ·•••.hlle as
r.ll )Wf) in Appcn.dlx Fig. 2 und nea1n return to th,~ origInal position. ·f.'he dlstoncc
wldle tile' test pIece I:.; raised fillull be so lH.lJu:;t~d tlwt the abraslllg ~lstAllce of
kst UlJrllllr lhe one revolutlOIl of cylinder may be: 400:!: SOlin.
'J ",:l.;:..l piece skill t,.; protruded by aoout 2 mm from the ~rip (!lee AppendIx
Fig. 2). In order to meet this condItIon In the Cllse where the thiclmess of ter.t
piece hiLi b<:cn chnnged, the r.rip sholl be mode nble to adjust the protruded amount
of lc·;t. f'le(>~ by screw. The lc:;t piece shall be placed on abr<.tsi'(;·cloth before
HIe C}'IIllJcr is rOl,1tcd and shall be made to be raised nutolllaticJll,' when the
;,hr::lr.lve dlstJl1ce has rcachcl! to 40 m.
F;lrth~r. if t~crc is tl".t: device which has n,) nbrasivc clolh pre~ser and is able
tn abra.c;p r.()ntlnuollsly without temporary raising of test piece ill tltis position (see
/rpcnJi.. rl)J. 3), this dr-vlr.c may be used. In tills ,case also. the ab/asing distance
~i:;}11 be ~() In. .
21. ". ::0 "
1< GJ22-) 9133
3.2 Abrns[vc Cloth In the case where the abrasIve cloth Is the size 450 mm
x 475 mOl·with using the abrasive grains of the alumina abrosive No. 60 and tests
the standard rubucr sample of 3.3, It shall have the abrasIon performance of 200
± 20 mg per 40 In of abraslng distance. If the abrasion perforl1lonce of abrnslve
cloth Is too lorge, It shall be adjusted prior to the test. .
Further, the abrasive cloth shall be marked with symbol Indicating the
direction of rotation and shall IJe lIsed always In the defined direction.
3.3 Stanuord Rubber
to the Appendl.x"1'aIj~
22. 21
l( f.:l7.2-198R
•..•r l' '.' ,.C')" J
.... • .. __ --.1.. -._._')__ -=_.'.,._=--
. 1;,-,,; ", .".1".11 dill',: ,-;' ";'l,;...:l :;l!dll be pI cpclred to lllicLll'::';5 , flllil .x widlh ] 20
1", ~I, .'1d ntlll to k' 'llk,:tl1i:·.r~dJllrkr f.~,0 c()ltditi~)n~; lSi.'·C, :{O ,.tin, 3.5 MP~
(:1~,.7 h:(/,';II:) ."Ild skl1l l:r.: w;cd ;·JftlJr 7'.'. II or (vt:r h:lVe (:I;,!,~.:;1 frOt'll
. : . ..~: .
'ld ''''-' ,,,,, ,tlL:.<,l ~j. ,.,,, ••..•• )1.&1 J ~dUI111l.ltCe of ,!Jfl.l:.I·C CJ(~lll The: <.lufusion
j~'rf'.lrll1;:;I·:;:c oT-awlsivc cbtf'$lwl be mC<.1::urcd OillTlCtcsrpr~c~made of standard
rtlbbN ,l("f',m:illg to the lTi/~thod of ~.2 before and nfler a scrif.>~ r.f abrasion tests.
; ;·c k.;i. P:"ccs shall be ;] ,; Li..:r.; dlltJ the abra~;ioll performance l){ aurasivc cloth
:;!l:ll b~ r,..q"c~('ntcd by thf' rnc;)n vallie of nbrnsJ.Jn losses. The Llbmslon
perfonnon ..• (I:' f1br;1f,!VC Clr,:.11 shall be ~oo .!: 20 mr, per 40 rn or abl'i':zlng distance
1,,'11'1 l·'(~(.·",· ;;I'! jftf'r tile :ll.'r;l~ic'll te~t 0110 It:; (!j(fcrcncc between bdore <lIIU afler
tile test ;;11:"11 be: with!ll ~o JJ~g.
Ttl'~ ;.. ' :::lII'CIIICflt u( j,I,[ :t:.;ir.lfl pcr [orllvlIII:I; of ilIJl':J:;ivc c!dtl1 :;l,~ill be conducted
~l l,;;)ch ti,dc wIlen llle UJle of abrasion test differcs.
Fur:',.;:-, ,:"(~11 011 ~I.· .'1'11'': tll')', the tC:.it by the :1!.Jrasivc ck,th rncnslrcd with
.! ,. i d 11I11,Jnc.:e :,!li.lll b~~conducted at 1110:;t 12 times anJ whcn the test is
condllclt:d lll···re time5, the C1lJrC15Ive performance )f abrasivc cloth sl1:)11 1e rflcasurcd
;llIew wit II usille the (('~l l'iI....:t.: or sUllld;lrd rubber.
.,.::. :ii.:i Ill.' I of tl'ril:~i()'1 '1'<.;;,( The device shall be adjusted bel. 're tCsting so
':11:11 I.I!(·--l:,;J'(.IIZfOTcst pier:.:: In;l}' be protruded by about 2 nUll. If th~ test piece
is ~;o worr, t!::·t. tile atJr;1sinr. cJistnnce 40 m m.:1Y he impos'sihlr, the rmnrudcd amount
." l..:;,L pk,;c shall 1..Jcre~j(Jju:..ted at the abrasing distJllce oi abou. LO 1II.
The I )'./,1. r of nild"'r l~:~II"1 :llcd by C1urJ:;il)rl :-.li;,.l1l ~)c rCI1l(,vr::d hY.,hrush,
.. :'1" ,. ,'''.I.ion ·of air b,~(orc tile tcst ancJ dUljrl~ tlie test.
TIJ~ I:lil:i~ ot in·.Jividu.:1 '.' ',t pi'-':l~c shall be nlcasure£1 witil prccl:'JJII ;)f I mg.
In Il(~ r.;1~1~ wllcrc tllc snl.1/1 f)iC~~l~S of rubber Clrc adhering to tile 1.(':>( plt~CC Dtter
l"'~ ,IUI dsiull test, L1:t') ~I.d,l Lc 1<;11l0vCJ before rllcasuremcnL
23. .~
I":
Cal~l~~~U.~
Tile alJl'l'sioll k1ss ~;Il;]llbe c<Jlcul<lled <lccorcling to tlll~ following forniula:
.)(; . ·.~lltl
(I) ,~
.-.;: ,ilm.sloll pcrforlliullcc of abrasive cloLh per 40 III of
"
l.lbraslllg cI isl<ll1ce (lI1g)
