Tiêu chuẩn iso 06789 1 2017

Unles otherw ise spe ified, nopar of this p blc tion ma y be r epr od c d or utilz d otherw ise in an form or b an me ns, ele tr onic or me hanic l, inclu in p oto opying , or postin on

A ssembl y tools for scr ews and nuts —

Part 1:

Outils de ma oeuvre p ur vis et écro s — Outils dynamométrique s à

comma de ma ue lle —

Partie 1: Exigence s  et méth de s d’e ssai p ur v rifier la co frmité 

de co c ption et la co frmité de q alité: e xigence s minimale s p ur 

déclaration de co frmité

COPYRIGHT PROTECTED DOCUMENT

© ISO 2017, P blshed in Sw itz rlan

A ll rig hts r eserved Unles otherw ise spe ified, nopar of this p blc tion ma y be r epr od c d or utilz d otherw ise in an form

or b an me ns, ele tr onic or me hanic l, inclu in p oto opying , or postin on the internet or an intranet , w ithout prior

written permis ion Permis ion c n be req esed from either ISO at the ad r es below or ISO’s member bod y in the c u try of

F reword i v

Introduction vi

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms, definitio s and symbols 1

3.1 Te msan definitions 1

3.2 Symb ls, desig nations an u it 3

4 Clas ification 3

5 Req irements 3

5.1 Desig n conformanc tes ing 3

5.1.1 General 3

5.1.2 Max imum tor que v lues 4

5.1.3 Spe ified tor que r ang e 4

5.1.4 S ales, dials an displa ys 4

5.1.5 Max imum pe mis ible deviation 5

5.1.6 Over lo ding tes 5

5.1.7 E d ranc tes 5

5.1.8 Efe t of g eometric chang es 6

5.2 Q ualty conformanc testing 7

5.3 Conformanc tes d ring use 7

6 Torque me sur ement 7

6.1 Torque measur ement ys em 7

6.2 A pplcation of tor que 8

6.3 A mbient con itions 8

6.4 Measur ement req irement 9

6.5 Measur ement seq enc 1

6.5.1 General 1

6.5.2 In icating torque to ls, T ype I 1

6.5.3 S ting tor que to ls, T ype I

1 7 Calculation of deviation 12

7.1 General 1

7.2 Calculation example 1 1

7.3 Calculation example 2 1

8 Declaratio of c onformanc e 14

9 Mar king 15

A nne x A (normative) E amples of indicatin torque to ls (T ype I 16

A nne x B (normative) E amples of set ing tor que to ls (T ype I ) 17

A nne x C (informative) Me sur ement sequenc e flowchar t for torque to ls 19

Biblog raphy 22

ISO (he Int ernational Org nization for Stan ardization) is a worldwidefede ation of national s an ards

b dies (ISO membe b dies) The work of pr p ring Int ernational Stan ards is normaly car ied out

through ISO t ech ical committ ees Each membe b dy int er st ed in a subje t for w hich a t ech ical

committ ee has be n es a lshed has the right t o be r pr sent ed on that committ ee Int ernational

org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take part in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www iso org dir ctives)

A tt ention is drawn t o the p s ibi ity that some of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sponsible for identifying any or al such p t ent right Detais of

any p t ent right identified d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www iso org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

F or an ex lanation on the v lu tary natur of s an ards, the meaning of ISO spe if ic t erms an

ex r s ions r lat ed t o conformity as es ment, as wel as information a out ISO’ s adhe enc t o the

World Trade Org nization (WTO) principles in the Te hnical Bar ie s t o Trade (TBT) se the folowing

URL: www iso org iso / for word html

This document was pr p r d b Te h ical C mmitt ee ISO/TC 2 , Smal to l s , Subcommitt ee SC 1 ,

As s embly to l s fr s c rews  a d n t , ple s a d nip e s

This firs edition of ISO 6 8 -1, t og ethe with ISO 6 8 - 2, canc ls and r plac s ISO 6 8 :2 0 w hich

has be n t ech ical y r vised with chang es as fol ow s

a) ISO 6 8 :2 0 has be n divided int o two p rt This document spe ifies the r q ir ment for

design an man factur inclu ing thecont ent of a de laration of conformanc ISO 6 89- 2 spe if ies

the r q ir ment for trac a le c rtif icat es of calbration It inclu es a method for calculation of

unc rtainties an pro ides a method for calbration of the t orq e measur ment devic used for

cal brating han t orq e t ools

b) The output drive designation of t orq e t ools is ex an ed t o inclu e hex g onal an othe output

drives

c) The def inition ofthe t orq e rang e of the t oolshas be n chang ed

d) The rat e of lo ding ( hown b the time t o achieve the las 2 % ) hasbe n chang ed

e) The imp rtanc of a oiding parasitic for es has be n emphasiz d

f) Ex lanat ory flowchart for the measur ment seq enc of dife ent t orq e t ools ha e be n ad ed in

Annex C

g) The r q ir ment for a “de laration of conformanc ” that the t orq e t ool conforms with this

document has be n ad ed

h) The r q ir ment for a “c rtif icat e of cal bration” has be n r mo ed, r co nizing that

man factur rs’ calbration c rtif icat es ha e not pr viously contained enough information t o be

trac a le calbration c rtif icat es

j) Figur s B.2, B.3, B.5 an B.6 ha e be n chang ed.

A l s of al p rt in theISO 6 8 se ies can be fou d on the ISO websit e

The r vision of ISO 6 8 :2 0 has be n designed t o achieve the folowing impro ement

ISO 6 8 has be n splt t o pro ide two levels of documentation It r co niz s the dife ent ne ds of

dife ent use s of the s an ard

This document contin es t o pro ide designe s an man factur rs with r lev nt minimum r q ir ment

for the develo ment, prod ction an documentation ofhan t orq e t ools

ISO 6 8 - 2 pro ides detaied methods for calculation of u c rtainties an r q ir ment for calbrations

This wi l alow use s of calbration se vic s t o mor easi y compar the calbrations from dife ent

la orat ories Ad itionaly, minimum r q ir ment for the calbration of t orq e measur ment devic s

ar desc ibed in ISO 6 89- 2:2 1 , Annex C

A ssembl y tools for scr ews and nuts — Hand torque tools —

Part 1:

This document pe if ies the conformanc t es ing an marking r q ir ment for han t orq e t ools used

for controled tight ening of sc ew s an n t It also spe ifies the minimum r q ir ment for de laration

of conformanc for han t orq e t ools

This document a ples t o han t orq e t ools w hich ar clas if ied as indicating t orq e t ools (Ty e I) an

set ing t orq e t ools (Ty e I )

NOTE Han t orq e t ools covered by this document are those identif ied in ISO 170 :2 0 by reference

n mb r 6 1 0 1 0, 6 1 0 1 1 an 6 1 0 1 0, 6 1 0 1 1 an 6 1 0 14 0, 6 1 0 1 0 ISO 170 is cur ently

u der revision In the ne t edition, torq e t ools wil b moved t o an own clause, an with this chang the

reference n mb r wil also chang e an ad itionalreference n mb r wil b ad ed

This document does not spe ify r q ir ment of calbration c rtif icat es for han t orq e t ools These

ar desc ibed in ISO 6 89- 2

2 Normati ve r eferences

The folowing document ar r fe r d t o in the t ext in such a wa that some or al of their cont ent

cons itut es r q ir ment of this document F or dat ed r fe enc s, only the edition cit ed a ples F or

un at ed r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment ) a ples

ISO 1 73, As s embly to l s fr sc rews a d n t — Dri ve ends f r h nd- a d machine -o e ated sc rewdri ve  

bits a d c on ec tin  p rts — Dimens io s, torq e tes tin

ISO 1 74-1, As s embly  to l s fr  sc rews  a d  n ts —  Dri vin   s qu r s  — Part 1:  Dri v in   s qu r s  fr  h nd 

s ocket to l s

ISO 6 8 - 2:2 1 , As s embly  to l s  fr  s c rews  a d  n ts — Ha d  torq e  to l s — Part 2 :  R eq ir ments fr 

c albratio  a d dete min tio  o meas ur ment u c ertaint y

ISO/IEC 1 0 5, G ene al r q ir ments fr the c ompetenc e o tes tin  a d c albration la oratories

3 Terms, definitions and symbols

3.1 Ter ms and definitions

F or the purposes of this document, the folowing t ermsand definitions a ply

ISO an IEC maintain t erminolo ical data ases for use in s an ardization at the folowing ad r s es:

— IECEle tro edia: a aia le at ht p:/ www ele tro edia org

— ISO Onlne brow sing plat orm:a ai a le at ht p:/ www iso org o p

design conformance test

t ech ical ex mination of conformanc with those r q ir ment t o be met d ring design or modif ication

of han t orq e t ools

3.1.2

qualty conformance test

t ech ical ex mination of conformanc with those r q ir ment t o be met d ring man factur of han

t orq e t ools

3.1.3

declaratio of co formance

document ed information pro ided b the man factur r that the t orq e t ool comples with the

r q ir ment of this document

3.1.4

maximum permis ible deviatio

ma imum v lue of r lative measur ment deviation of the o se ved t orq e v lue on the t orq e

measur ment devic measur d as a pe c ntag e of the targ et t orq e v lue on the t orq e t ool

Not e 1 t o entry: S metimes the term “ac uracy” is stil used in place of the term “ ma imum permis ible deviation”

which is, however, not tech icaly cor ect T e concept “ me surement ac uracy” is not a q antity an is not given

a n merical q antity value A me surement is said to b more ac urat e when it ofer a smal er me surement

deviation

Not e 2 to entry: Ma imum permis ible deviation is diferent from me surement er or which is used in ISO 6 8 -2

an def ined in ISO/IE Guide 9

3.1.5

torq e me surement sy stem

combination of a t orq e measur ment devic and the lo ding syst em for a plcation of t orq e that act

as the measur ment s an ard for thehan t orq e t ool

Not e 1 t o entry: A calibration system as def ined in ISO 6 8 -2can also b used as a t orq e me surement system

in this document

3.1.6

torq e me surement device

working measur ment s an ard pro ided eithe me hanicaly or b an ele tronic t orq e transd c r

an displa

3.1 7

in icating torque tool (Ty e I

t ool that in icat es b means of a me hanical scale, dial or ele tronic displa , thev lue of t orq e ex ert ed

b the t ool at the output drive

3.1.8

set ing torq e tool (Ty e I )

t ool sensing t orq e transmitt ed b comp ring the t orq e a pl ed with a self-contained s an ard an

signal ng the transmis ion of the pr -sele t ed v lue b a phy sical impulse, with or without au ible

signal, ca using a t emp rary r d ction in the t orq e a pl ed

3.1 9

adjustable grad ated torque tool (Ty e I , Clas A, Clas D and Clas G)

t ool designed t o be adjust ed b the use , w hich has a scale or a displa t o as is adjus ment

3.1.1

adjustable no -graduated torq e tool (Ty e I , Clas C and Clas F)

t ool designed t o be adjust ed b the use with the aid of a t orq e measur ment sy st em

torq e tool with fixed adjustment (Ty e I , Clas B and Clas E)

t ool not designed t o be adjust ed b the use , i.e ha ing a single set ing

3.2 Symbols, desig nations and units

The designations used in this document ar in icat ed in Ta le 1

Table 1 — Symbols, designatio s and units

Value of t orq e desired, which may b the in icated, set, nominalvalue, depen ing on

the ty e an clas of the torq e to l

The han t orq e t ools t o w hich this document a ples ar clas ified as folow s

a) In icating t orq e t ools (Ty e I; se An ex A):

1) Clas A:Wr nch, t orsion or flexion b r;

2) Clas B: Wr nch, rigid housing, with scale or dial or displa ;

3) Clas C: Wr nch, rigid housing an ele tronic measur men

4 ) Clas D: S r wdrive , with scale or dial or displa ;

5) Clas E: S r wdrive , with ele tronic measur men

b) S t ing t orq e t ools (Ty e I ; se An ex B):

1) Clas A:Wr nch, adjus a le, grad at ed or with displa ;

2) Clas B: Wr nch, fix ed adjus men

3) Clas C: Wr nch, adjus a le, non-grad at ed;

4 ) Clas D: S r wdrive , adjus a le, grad at ed or with displa ;

5) Clas E: S r wdrive , fix ed adjus men

6) Clas F : S r wdrive , adjus a le, non-grad at ed;

7) Clas G: Wr nch, flexion b r, adjus a le, grad at ed

5.1.2 Max imum torque values

The siz of the output drive lmit the ma imum t orq e v lue of the r spe tive t orq e t ool The

as ignment is car ied out ac ording t o the v lues given in Ta le 2 F or output not spe if ied in Ta le 2,

the siz of the output drive is det ermined b the ma imum t orq e of the r spe tive t orq e t ool an

shal comply with the r q ir ment given in 5.1.6 an 5.1.8

Table 2— Maximum torque v alues of the torque tool

Dimensions in a c rdanc with ISO 1 73

5.1.3 Specified tor que rang e

The r q ir ment and methods in this document co e a spe ified t orq e rang e, w he e the rang e

depends on ty e an clas of the t orq e t ool

The t orq e rang e or v lue is sele t ed for the dife ent t orq e t ools as folow s

— In icating t orq e t ools of Ty e I (Clas esA, B and D ):From the lowes marked v luet o 1 0 % of the

ma imum t orq e v lue of the r spe tive t ool

— In icating t orq e t ools of Ty e I (Clas es Can E):As spe if ied b the man factur r

— S t ing t orq e t ools of Ty e I (Clas es A, D an G): From the lowes marked v lue t o 1 0 % of the

ma imum t orq e v lue of the r spe tive t ool

— S t ing t orq e t ools of Ty e I (Clas es B, C, E an F):As spe if ied b the man factur r

5.1.4 Scales, dials and displays

F or scales and dials, the inc ement betwe n two grad ation marks shal not ex ce d 5 % of the ma imum

t orq e v lue of the t orq e t ool

F or ele tronic display s, the r solution shal not ex ce d 1 4 of the ma imum pe mis ible r lative

deviation of the t orq e t ool at each targ et v lue

F or in icating t orq e t ools of Ty e I (Clas es A, B an D ), the scales or dials shal be marked with a z ro

p sition The rang e betwe n z ro an the lowes spe if ied t orq e v lue shal be marked on or near the

dial or scale in a wa t o make clear t o the use that this rang e is not within the spe if ied t orq e rang e

Alt ernatively, the scale, dial or displa shal be identified in some wa t o indicat e the spe if ied t orq e

rang e t o the use

F or in icating t orq e t ools of Ty e I (Clas es C an E), the rang e betwe n z ro an the lower v lue of

the rang e spe if ied b the man factur r shal be identified in some wa t o make clear t o the use that

this rang e is not in the spe if ied rang e

The design of scales, dials an display s has a signif icant influenc on the calbration u c rtainty of a

t orq e t ool Designe s ar r commen ed t o take guidanc from ISO 6 8 - 2:2 1 , 6.2.1

5.1.5 Max imum permis ible deviation

Each r sult for a t orq e t ool, r corded in ac ordanc with Clause 6 an calculat ed in ac ordanc with

Clause 7, shal le within the r spe tive ma imum pe mis ible r lative deviation for the ty e an clas

of that t ool s at ed in Ta les 3 an 4

Whe e a man factur r claims a smale ma imum pe mis ible r lative deviation than s at ed in Ta les 3

an 4, each r sult shal le within the claimed ma imum pe mis ible r lative deviation

F or det ermining conformanc with this subclause, the influenc of the unc rtainty of the t orq e t ool

an of the t orq e measur ment devic shal not be conside ed

Table 3 — Maximum permis ible relative deviatio (Ty e I

If a to l is operatin in both dire tions, the ma imum

permis ible relative deviation shal be met in e ch dire tion

spe if ied b the man fa turer

Table 4 — Maximum permis ible relative deviatio (Ty e I )

If a to l is operatin in both dire tions, the ma imum

permis ible relative deviation shal be met in e ch dire tion

spe if ied b the man fa turer

5.1.6 Over loading test

Al t orq et ools t o be t est ed shal be lo ded thr etimes in each dir ction of o e ation t o a t orq e v lue

not les than 1 5 % of the ma imum t orq e v lue or at nominal ca acity for set ing t orq e t ools of

Ty e I (Clas es D, E an F) F or Ty e I (Clas es A, C, D, F and G), the t es is pe formed aft er set ing the

t ool t o 1 0 % of the ma imum t orq e v lue Thist es does not a ply t o l miting t orq e t ools

Aft er the o e lo ding t es , the t orq e t ool shal s i be within the ma imum pe mis ible r lative

deviation spe if ied in 5.1.5 w hen t est ed in ac ordanc with Clause 6 an shal show no phy sical damag e

that can be detrimental t o the t orq e t ool pe formanc an safety

5.1.7 E duranc e test

Al t orq e t ools t o be t est ed shal be cycled at the ma imum v lue, or nominal pr -set t orq e v lue for

t ools of Ty e I (Clas es B and E), for 5 0 0 cycles in each dir ction that the me hanism o e at es, at a

rat e betwe n 5 cycles /min an 2 cycles/min

Aft er the en uranc t es , the t orq e t ool shal s i be within the ma imum pe mis ible r lative

deviation spe if ied in 5.1.5 and shal show no phy sical damag e that can be detrimental t o the t orq e

t ool pe formanc an safety

5.1.8 Efect of g eometr ic chang es

NOTE S me t ools in icate or operate at the same torq e value in epen ent of the position of the lo d

ap lication point S me t ools in icate or operat e at diferent orq e values depen ing on the position of the lo d

ap lication

Al t orq e t ools t o be t est ed shal be t est ed for the influenc on t orq e output d e t o changing g eometry,

such as but not ex clusively flexible head rat chet ( e Figur 1) and ext ension b rsdesigned t o be used

t o r d c o e at or efort se Figur 2) The man factur r shal communicat e these influenc s t o use s

through ins ruction she t or the de laration of conformanc

Figure 2 — Example of an extension bar

5.2 Qual ty conformanc e testing

Al t orq e t ools shal be t est ed d ring man factur in ac ordanc with Clause 6

Al t orq e t ools that conform with the r q ir ment in 5.1.5 shal eithe be is ued with a de laration

of conformanc in ac ordanc with Clause 8 or a calbration c rtificat e in ac ordanc with ISO 6 8 - 2

5.3 Conformanc e test dur ing use

If the use uti z s proc d r s for the control of t es devic s, t orq e t ools shal be inclu ed in these

proc d r s The int erv l between conformanc t es s shal be chosen on the b sis of the fact ors of

o e ation such as r q ir d ma imum pe mis ible deviation, fr q ency of use, ty ical lo d d ring

o e ation as wel as ambient con itions d ring o e ation an st orag e con itions The int erv l shal

be ada t ed ac ording t o the proc d r s spe ified for the control of t es devic s an b ev luating the

r sult g ined d ring suc es ive conformanc t es s

If the use does not uti z a control proc d r , a pe iod of 1 months, or 50 0cycles, w hicheve oc urs

firs , ma be taken as default v lues for the int erv l betwe n conformanc t es s The int erv l s art

with the f irs use of the t orq e t ool

A short er int erv l betwe n conformanc t es s ma be used if r q ir d b the use , their cust ome or b

legislation

The t orq e t ool shal be t est ed for conformanc in ac ordanc with 5.2 w hen it has be n subje t ed t o an

o e lo d gr at er than the v lues given in 5.1.6, aft er r pair or aft er any impro e han lng w hich might

influenc the t orq e t ool pe formanc an the fulf ilment of the q al ty conformanc r q ir ment

Conformanc t es s d ring use shal be pe formed in ac ordanc with 5.2 The use ma def ine a

dife ent pe if ied t orq e rang e for thet orq e t ool

6.1 Torque me surement system

The t orq e measur ment sy st em shal be chosen t o be suita le for the measur ment of the spe ified

rang e of the t orq e t ool

The ma imum measur ment e ror of the t orq e measur ment devic shal not ex ce d 1 4 of the

claimed ma imum pe mis ible r lative deviation of the t orq e t ool at each targ et v lue

The t orq e measur ment devic shal ha e a v ld calbration c rtificat e trac a le t o a national

s an ard or t o a calbration la orat ory me ting the r q ir ment of ISO/IEC 1 0 5 Alt ernatively, the

t orq e measur ment devic shal be calbrat ed b a la orat ory maintaining the national measur ment

s an ard or ac ording t o ISO 6 89- 2:2 1 , Annex C

6.2 A ppl cation of torque

6.2.1 T e tor que shal be a pled b means of one of the folow ing methods

a) The t orq e t ool is caused t o rotat e a out the t orq e measur ment devic a is b the folowing:

1) for t orq e wr nches, a for e or two for es with eq al v lue and o p sit e dir ction for T-han les,

a pled t o the han le of the t ool at a cons ant radial dis anc ;

2) for t orq e sc ewdrive s, a t orq e a pled t o the han le of the t ool or two for es with eq al

v luean o p sit e dir ction for T-han les

b) The t orq e measur ment devic rotat es on it measuring a is w hi e a r action for e is a pled t o

thehan le of the t orq e t ool

In al cases, each for e a pled t o the t ool shal be pe pen icular t o the a is of rotation

In al cases, the han le of the t ool shal be alowed t o move in al planes of rotation

The con e tion betwe n t orq e measur ment sy st em an t orq e t ool shal pe mit self-algnment so

that p rasitic for esand moment ar minimiz d

6.2.2 T e to l to be measur ed shal be oriented in ac or danc with Fig ur es 3, 4 or 5

a) In the case of Figur s 3 or 4, the o e ating for e, F, shal be a pl ed within the angular deviation

l mit spe if ied in the c ntr of the han hold position of the grip or of the marked lo d point

b) In the case of Figur 5, the o e ating t orq e shal be a pled within the angular deviation l mit

spe if ied

c) To ls with flexible head shal be measur d with the a is of rotation pe pen icular t o the a is of

the to l

6.2.3 In icating tor que to ls (T ype I) shal be lo ded with an increasing tor que u ti the tar g et

tor que v lue is in icated on the tor que to l If the torque to be measur ed has be n exc eded, then the

measur ement shal be repeated fr om the z ro p sition The time inte v ls betwe n any two subseq ent

lo ding sshal be of the samed r ation Sla ve p inte s (memory in icators)shal not be used when taking

the r eading s

6.2.4 S tting torque to ls (T ype I ) shal be lo ded w ith a slowly an s eadiy incr easing tor que u til

attainment of the tar g et tor que is sig naled b the tor que to l The tar g et torque shal be r eached afe a

minimum time as defined in Ta le 5

Table 5 — Minimum time period for appl catio of torq e values

Minimum time t o inc e se the

t orq e from 8 % of targ t value to

targ t value

F or sc ewdrive s (Ty e I , Clas es D, E an F), the time t o inc ease the t orq e from 8 % oftarg et v lue

t o targ et v lue shal be betwe n 0,5 s an 1,0 s

6.3 A mbient conditions

The measur ment proc d r shal be car ied out at an ambient t empe atur held cons ant t o within

6.4 Measurement requirements

a) Prior t o measur ment, the t orq e measur ment devic an the t orq e t ool shal be alowed t o

at ain the ambient t empe atur

b) Whe e the output drive is not pe manently at ached, the dimensions of the drive that afe t the

radial dis anc shal be r corded

During measur ment, analo ue scales or dials shal be r ad in a pe pendicular dir ction in orde t o

minimiz paral a e rors

a) Wrench in a vertical position

b) Wrench in 5° of set

Key

a

Line contact , marked lo ding point or centr e of the han hold position of the g rip

Figure 3 — Testing of a wrench in a vertical positio (fro t view)