Iec 62841 3 10 2015

The text of this stan ard is based on the f ol owin doc ments: Ful inf ormation on the votin f or the a proval of this stan ard can b foun in the re ort on votin in icated in the a ove t

IEC 62841 - 3- 1 0

Editio 1.0 2 15-0

Elect ric mot or- operated hand- held t ools, t ransport able t ools and law n and

garden machinery – Safety –

Part 3- 10: Part icular requirement s for t ransport able cut - of machines

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Al rig ts r es r ve Unle s oth rwis s e ifi d, n p rt of this p blc tio ma b r epr od c d or uti z d in a y form

or b a y me n , ele tr onic or me h nic l in lu in p oto o yin a d microfim, with ut p rmis io in wr itin from

eith r IEC or IEC's memb r Natio al Commite in th c u tr y of th re u ste If y u h v a y q e tio s a o t IEC

c p r i ht or h v a e q ir y a o t o tainin a ditio al ri hts to this p blc tio , ple s c nta t th a dr es b low or

y ur lo al IEC memb r Natio al Commite for ur th r informatio

Th Intern tio al Ele trote h ic l Commis io (IEC) is th le din glo al org niz tio th t pr ep res a d p bls e

Internatio al Sta d r ds for al ele tri al ele tr onic a d relate te h olo ie

Abo t IEC p blc tio s

Th te h ic l c nte t of IEC p blc tio s is k pt u d r c n ta t r eview b th IEC Ple s ma e s re th t y u h v th

late t e itio ,a c rr ig n a or a ame dme t mig t h v b e p bls e

IEC Cat alo ue - webst ore.e ch/ cat alo ue

Th st an -alo e a plc t io for c n ultin th e tire

biblo ra hic l informat io o IEC Intern tio al Sta d rd ,

Te h ic l Sp cific tio s, Te h ic l R ep rts a d oth r

d c me ts A v aia le for P , Ma OS, A ndroid Ta let s a d

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Th a v an e s arc e a le t o fin IEC p blc t io s b a

variety of crit eria (efere c n mb r, t ext, t ec nic l

c mmitt e,…) It als gives informatio o projec t s, re la e

a d wit hdrawn p blc tio s

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St ay u to d te o al n w IEC p blc tio s Ju t Pu ls e

d t ais al n w p blc t io s rele s d A v aia le o ln a d

als o c a mo t h b emai

Ele t ro edia - www ele t ro edia.org

Th world's le din o ln dic t io ary of elec t ro ic a d

ele t ric l t erms c ntainin more t ha 3 0 0 terms a d

d finitio s in En ls a d Fre c , wit h e uiv ale t t erms in 15

a ditio al la g a e Als k nown a t he Int ern t io al

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If y ou wis to giv e u your fe d a k o t his p blc tio or

n e furt her a sista c , ple s c nta t t he Cu tomer Serv ic

Ce t re:c c@ie c

IEC 62841 - 3- 1 0

Edit io 1.0 2 15-0

Elect ric mot or- operated hand- held t ools, t ransport able t ools and lawn and

garden machinery – Safety –

Part 3- 10: Part icular requirement s for t ransport able cut - of machines

FOREWORD 4

1 Sco e 6

2 Normative ref eren es 6

3 Terms an def i ition 6

4 General req irements 7

5 General con ition for the tests 7

6 Radiation, toxicity an simiar hazard 8

7 Clas ification 8

8 Markin an in tru tion 8

9 Protection again t ac es to l ve p rts 1

10 Startin 1

1 Input an c r ent 1

12 He tin 1

13 Resistan e to he t an fire 1

14 Moisture resistan e 1

15 Resistan e to ru tin 1

16 Overlo d protection of tran formers an as ociated circ its 1

17 En uran e 1

18 Abnormal o eration 12 19 Mec anical hazard 12 2 Mec anical stren th 17 21 Con tru tion 18 2 Internal wirin 18 2 Comp nents 19 2 Sup ly con ection an external f lexible cord 19 2 Terminals f or external con u tors 19 2 Provision f or e rthin 19 2 Screws an con ection 19 2 Cre p ge distan es, cle ran es an distan es throu h in ulation 19 An exes 2

An ex I (informative) Me s rement of noise an vibration emis ion 2

An ex K (normative) Bat ery to ls an b tery p c s 2

Biblogra h 2

Fig re 101 – Example of a c t-of mac ine 2

Fig re 10 – Examples of ga s an rake an les 21

Fig re 10 – Whe l g ard 2

Fig re 10 – Test pro e 2

Fig re 10 – Sp rk def lection 2

Fig re 10 – Prin ip l desig s an dimen ion of f lan es 2

Fig re 10 – Position of test hole for imp ct test 2

Fig re 10 – Whe l g ard material stren th test 2

Ta le 4 – Req ired p rf orman e levels 12

Ta le 101 – Flan e dimen ion 16

Ta le 10 – Torq es f or testin f lan es 17

Ta le I 101 – Noise test con ition for c t-of f mac ines 2

INTERNATIONAL ELECTROTECHNICAL COMMISSION

_

SAFETY –

Part 3-10: Particular requirements f or transportable cut of f machines

1 Th Intern tio al Ele trote h ic l Commis io (IEC) is a worldwid org niz tio for sta d rdiz tio c mprisin

al n tio al ele trote h ic l c mmite s (IEC Natio al Commite s) Th o je t of IEC is to promote

intern tio al c -o eratio o al q e tio s c n ernin sta d rdiz tio in th ele tric l a d ele tro ic f i ld To

this e d a d in a ditio to oth r a tivitie , IEC p bls e Intern tio al Sta d rd , Te h ic l Sp cif i atio s,

Te h ic l Re orts, Pu lcly Av ia le Sp cif i atio s (P S) a d Guid s (h re f ter refer e to a “IEC

Pu lc tio (s)”) Th ir pre aratio is e tru te to te h ic l c mmite s; a y IEC Natio al Commite intere te

in th s bje t d alt with ma p rticip te in this pre aratory work Intern tio al g v rnme tal a d n n

-g v rnme tal org niz tio s laisin with th IEC als p rticip te in this pre aratio IEC c la orate clo ely

with th Intern tio al Org niz tio f or Sta d rdiz tio (ISO) in a c rd n e with c n itio s d termin d b

a re me t b twe n th two org niz tio s

2) Th f ormal d cisio s or a re me ts of IEC o te h ic l maters e pre s, a n arly a p s ible, a intern tio al

c n e s s of o inio o th rele a t s bje ts sin e e c te h ic l c mmite h s re re e tatio fom al

intere te IEC Natio al Commite s

3) IEC Pu lc tio s h v th form of re omme d tio s f or intern tio al u e a d are a c pte b IEC Natio al

Commite s in th t s n e Whie al re s n ble ef forts are ma e to e s re th t th te h ic l c nte t of IEC

Pu lc tio s is a c rate, IEC c n ot b h ld re p n ible for th wa in whic th y are u e or f or a y

misinterpretatio b a y e d u er

4) In ord r to promote intern tio al u if ormity, IEC Natio al Commite s u d rta e to a ply IEC Pu lc tio s

tra s are tly to th ma imum e te t p s ible in th ir n tio al a d re io al p blc tio s An div rg n e

b twe n a y IEC Pu lc tio a d th c re p n in n tio al or re io al p blc tio s al b cle rly in ic te in

th later

5) IEC its lf d e n t pro id a y ate tatio of c nf ormity In e e d nt c rtific tio b die pro id c nf ormity

a s s me t s rvic s a d, in s me are s, a c s to IEC mark of c nf ormity IEC is n t re p n ible f or a y

s rvic s c rie o t b in e e d nt c rtif i atio b die

6) Al u ers s o lde s re th t th y h v th late t e itio of this p blc tio

7) No la i ty s al ata h to IEC or its dire tors, emplo e s, s rv nts or a e ts in lu in in ivid al e p rts a d

memb rs of its te h ic l c mmite s a d IEC Natio al Commite s f or a y p rs n l injury, pro erty d ma e or

oth r d ma e of a y n ture wh ts e er, wh th r dire t or in ire t, or for c sts (in lu in le al f ee ) a d

e p n e arisin o t of th p blc tio , u e of, or rela c u o , this IEC Pu lc tio or a y oth r IEC

Pu lc tio s

8) Ate tio is drawn to th Normativ refere c s cite in this p blc tio Us of th refere c d p blc tio s is

in is e s ble for th c r e t a plc tio of this p blc tio

9) Ate tio is drawn to th p s ibi ty th t s me of th eleme ts of this IEC Pu lc tio ma b th s bje t of

p te t rig ts IEC s al n t b h ld re p n ible for id ntif yin a y or al s c p te t rig ts

International Stan ard IEC 6 8 1-3-10 has b en pre ared by IEC tec nical commite 1 6:

Saf ety of motor o erated electric to ls

The text of this stan ard is based on the f ol owin doc ments:

Ful inf ormation on the votin f or the a proval of this stan ard can b foun in the re ort on

votin in icated in the a ove ta le

This publ cation has b en draf ted in ac ordan e with the ISO/IEC Directives, Part 2

This Part 3-10 is to b u ed in conju ction with the first edition of IEC 6 8 1-1 (2 14).

This Part 3-10 s p lements or modif ies the cor esp n in clau es in IEC 6 8 1-1, so as to

con ert it into the IEC Stan ard: Partic lar req irements f or tran p rta le c t-of f mac ines

Where a p rtic lar s bclau e of Part 1 is not mentioned in this Part 3-10, that s bclau e

a pl es as far as relevant Where this stan ard states “ad ition”, “modification” or

“re lacement , the relevant text in Part 1 is to b ada ted ac ordin ly

The fol owin print typ s are u ed:

– req irements: in roman typ ;

– test sp cific t io s: in ital ic type;

– n te : in smal roma ty e

Word in bold in the text are defined in Clau e 3 When a def i ition con ern an adjective,

the adjective an the as ociated nou are also in b ld

Subclau es, notes an fig res whic are ad itional to those in Part 1 are n mb red startin

f rom 101

A l st of al p rts of the IEC 6 841 series, u der the general title: Ele t ric motor-o erat ed

h nd-h ld to ls, tra sp rta le t ools a d l awn a d g rde ma hinery – Safety, can b foun

on the IEC we site

The commit e has decided that the contents of this publ cation wi remain u c an ed u ti

the sta i ty date in icated on the IEC we site u der "ht p:/we store.iec.c " in the data

related to the sp cif i publ cation At this date, the publ cation wi b

• with rawn,

• re laced by a revised edition, or

A bi n ual version of this publcation may b is ued at a later date

NOT Th ate tio of Natio al Commite s is drawn to th f act th t e uipme t ma ufa turers a d te tin

org niz tio s ma n e a tra sitio al p rio folowin p blc tio of a n w, ame d d or re is d IEC p blc tio in

whic to ma e pro u ts in a c rd n e with th n w re uireme ts a d to e uip th ms lv s f or c n u tin n w or

re is d te ts

It is th re omme d tio of th c mmite th t th c nte t of this p blc tio b a o te for impleme tatio

n tio aly n t e rler th n 3 mo th fom th d te of p blc tio

IMPORTANT – The 'colour inside' logo on the cov r pa e of this publ c tion indic te

th t it contains colours whic are considere to be us f ul f or the cor e t

und rsta ding of its conte ts Us rs s ould theref ore print this doc me t using a

colour printer

ELECTRIC MOTOR-OPERA TED HA ND-HELD TOOLS,

This p rt of IEC 6 8 1 a pl es to tran p rta le c t off ma hine inten ed to c t materials

s c as metals, con rete an masonry an to b fited with one a rasive

– b nde reinf orc d wh el of Typ 41, or

This stan ard do s not a ply to:

– tran p rta le mitre saws;

– tran p rta le ti e saws;

– tran p rta le metal saws

NOT 101 Tra s orta le mitre s ws are c v re b IEC 6 8 1 3-9 Tra s orta le tie s ws wi b c v re b a

f uture p rt of IEC 6 8 1 3 Tra s orta le metal s ws wi b c v re b a f uture p rt of IEC 6 8 1 3

This clau e of Part 1 is a plca le ex e t as fol ows:

Add ition:

ISO 6 3-15, Bo d ed a rasiv produ ts – Dime sions – Part 15: Grind ing wh els for c t tin

-of o stat io ary or mo il e c t tin -of ma hines

to l desig ed to c t by me n of a rotatin abrasive c t-of f whe l (b n ed reinf orced or

diamon ), where the whe l is f i ed on a spin le whic is mou ted on a c t ing unit, the

mac ine is eq ip ed with a ta le whic s p orts an p sition the workpiece f i ed in a vice

an the c t ing unit is fit ed to an arm whic projects over the ta le fom a pivot located at

guard whic p rtly en loses the whe l an gives protection to the o erator

This clau e of Part 1 is a plca le

5 General conditions f or the tests

This clau e of Part 1 is a plca le, ex e t as f ol ows:

5.17 Ad d it ion:

Th mas of t he to l sh l l includ e th whe l g ard a d th fenc

Furt her p rts su h as c rying me ns that are re uired in a c rd an e wit h the user

instru t ions sh l l b included in t he mas

6 Radiation, toxicity and simi ar hazards

This clau e of Part 1 is a plca le

7 Classif ication

This clau e of Part 1 is a plca le

8 Marking and instructions

This clau e of Part 1 is a plca le, ex e t as f ol ows:

8.1 Add itio :

To ls s al also b marked with:

– the rate no-loa spe d of the output spin le

8.2 Add it io :

To ls s al also b marked with the fol owin saf ety warnin :

“ WARNING – Alway we r eye protection” or the sig M0 4 of ISO 7 10 or the f ol owin

The ad itional safety in tru tion as sp cified in 8.14.1.101 s al b given This p rt may b

printed se arately f om the “General Power To l Saf ety Warnin s”

For al warnin s in 8.14.1.101, the term “c t ing unit” may b re laced by another

a pro riate term at the dis retion of the man facturer

8.14.1.101 Safety instru tions f or c t of f ma hin s

1) Cut of f ma hine s fety warnin s

a) Position yours lf a d by ta ders awa from the pla e of the rotating whe l Th

g ard h lps t o prot ect th o erator fom brok en whe l fa me ts a d a cid ent al

c ntact wit h whe l

b) Us only b nde reinforc d or diamond c t off whe ls f or your power tool J ust

b c use a a c s ory c n be attac ed t o your p wer t ool , it do s n t as ure safe

o erat ion

NOT 1 Th wordin “b n e reinforc d” or “diamo d” is u e a a plc ble d p n in o th

d sig atio of th to l

c) The rate spe d of the a c s ory must be at le st e ual to the ma imum spe d

mark d on the power tool Ac es ories ru ning faster tha their rat ed sp ed c n

bre k a d fly a art

d) Whe ls must be u e only f or re omme de appl c tions For e ample: do not

grin with the side of a c t of f wh el Abrasiv c t-of whe ls are int end ed for

p riph ral grind ing, sid e forc s a plied to t hese whe ls ma c use them t o sh tt er

e) Alwa s us undama e whe l fla ge that are of cor e t diameter for your

s le te wh el P ro er wh el fl an es su p rt th whe l t hus red ucing the p s ibil ity

ofwhe l bre k g

f ) The outside diameter a d the thic ne s of your a c s ory must be within the

c pa ity rating of your p wer tool I nc r e tly sized a c s ories c n ot b

ad eq ately g ard ed or c ntroll ed

g) The arbour size of whe ls a d fla ge must properly f it the spindle of the power

tool Wh els a d fl an es with arb ur h l es that do n t matc th mo nt ing h rd ware

ofthe p wer to l wil l ru o t ofbalan e, vibrate ex ces ively a d ma c use los of

c ntrol

h) Do not u e dama e whe ls Bef ore ea h us , inspe t the whe ls f or c ips a d

cra k If the power tool or wh el is dro pe , inspe t f or d ma e or instal a

un ama ed wh el Af er inspe ting a d in tal ng the whe l position yours lf

a d by ta ders awa f rom the pla e of the rotating whe l a d run the power tool

at ma imum no loa spe d for one minute Dama ed wh els wil l n rma y bre k

a art during this test time

i) We r personal prote tive e uipme t Depe ding on appl c tion, u e f ac s ield,

s fety gog le or s fety gla s s As appropriate, we r dust ma k, he ring

workpie e f ra me ts Th e e prote tio must b c p ble ofst op in flying d ebri s

g n rated b v rio s o erations Th dust mask or respirator must b c p ble of

fil tratin p rticles g n rated b your o erat io Prolo g d e p sure to high intensity

n ise ma c use h aring l os

j) Keep by ta ders a s fe dista c awa from work are Anyone e tering the work

are must we r personal prote tiv e uipme t Fra me ts of work iec or of a

brok en wh el ma fly away and c use injury b y nd immediate are of o erat io

k) Position the cord cle r of th spinning a c s ory I f y u lose c ntrol, the c rd ma

b c t or sn g ed a d your h nd or arm ma b p ll ed int o t he spinnin wh el

l) Re ularly cle n the p wer to l s air v nts Th motor’s fa c n draw the d ust insid e

the h using a d ex ces ive a c mulat ion of p wd ered met al ma c use el ect ric l

h z rds

m) Do not operate the power tool n ar flammable materials Do not operate the

power tool whi e pla e on a combustible s rfa e s c a wood Sp rks c ul d

ignite t hese materials

n) Do not us a c s orie that re uire l quid co la ts U sing water or oth r l iquid

c ol ants ma result in el ectro ut ion or sh ck

NOT 2 Th a o e warnin d e n t a ply for p wer to ls s e if i aly d sig e for u e with a lq id

system

2) Kic ba k a d relate warning

Kic b c is a s d en re ction to a pin hed or s ag ed rotatin whe l Pin hin or

s ag in cau es ra id stal n of the rotatin whe l whic in turn cau es the u control ed

c t ing u it to b f orced upward toward the o erator

F r example, if an a rasive whe l is s ag ed or pin hed by the workpiece, the ed e of the

whe l that is enterin into the pin h p int can dig into the s rf ace of the material cau in

the whe l to clmb out or kic out Abrasive whe ls may also bre k u der these con ition

Kic b c is the res lt of p wer to l mis se an /or in or ect o eratin proced res or

con ition an can b avoided by takin pro er precaution as given b low

a) Maintain a firm grip on th p wer to l a d position your b dy a d arm to al ow

you to re ist kic ba k forc s Th o erator c n c ntrol u ward k ick ba k forc s, if

pro er pre a tio s are tak n

b) Do not position your body in l ne with the rotatin whe l If k ickba k o c rs, it wil l

pro el the c tting u it u wards t oward th o erator

c) Do not at a h a s w c ain, wo dc rvin bla e, s gme te diamond whe l with a

peripheral gap gre ter tha 10 mm or toothe s w bla e Su h bl ad es cre t e

fe u nt k ic b c a d l os ofc ntrol

d) Do not “jam” th wh el or apply e c s iv pre s re Do not at empt to ma e a

e c s iv depth of c t Ov rstres ing t he whe l in re ses the load ing a d

susc ptibility to twist in or bind in of the whe l in th c t a d t he p s ibility of

kickba k or whe l bre k ag

e) Whe the whe l is binding or whe inter upting a c t f or a y re son, switc of f

the p wer tool a d hold the c t in unit motionle s u ti the whe l come to a

complete sto Ne er at empt to remov the whe l from the c t whi e th whe l is

in motion otherwis kic ba k ma oc ur Invest igat e a d t ake c re tive a t io t o

eliminat e t he c use of whe l bind ing

f ) Do not re tart the c t ing operation in the workpie e Let the whe l re c ful

spe d a d c ref ul y re-e ter the c t Th whe l ma bind , walk u or kic b c ifthe

p wer to l is rest art ed in th work iec

g) Support a y ov rsize workpie e to minimize the ris of whe l pinc ing a d

kic ba k L rg work iec s tend to sa u d er their own weight Su p rts must b

pla ed u der the work piec n ar the l i e ofc t a d n ar the ed ge of th work iec o

b th sides oft he whe l

8.14.2 a) Ad ditio :

101) Information a out the p rmited a c s orie (diamon or b n ed reinf orced whe ls),

whe l diameter, whe l thic nes an b re diameter

For diamon whe ls, in tru tion that

– the maximum p ripheral ga b twe n segments s al b 10 mm;

– the rake an le s al b negative

Se Fig re 10

10 ) Explanation of the term “bonde reinf orc d whe l” or typ desig ation, if a pl ca le;

10 ) In tru tion to en ure that the c t of f ma hine is alway u ed on a sta le an level

s race an in tru tion how to sec re the mac ine if u ed on a workb n h or the lke;

10 ) Inf ormation a out maximum c tin ca acities at zero an maximum mitre an les

8.14.2 b) Ad dit io :

101) In tru tion f or pro er u e of blot ers, when they are provided with a b n ed reinf orced

prod ct;

10 ) In tru tion on mou tin of a c s orie an u e of the cor ect flan es, u e an care of

the a rasive prod ct For reversible flan es, in tru tion f or the cor ect method of fit in

the flan es;

10 ) In tru tion to the o erator on the u e of al the dif ferent typ s of whe ls sp cif ied in

the in tru tion in ac ordan e with 8.14.2 a) 101), e.g bon ed whe l, diamon

whe l

10 ) In tru tion how to sec re an s p ort the workpiece;

10 ) In tru tion to we r p rsonal protection eq ipment:

– he rin protection;

– gloves when han l n whe ls

8.14.2 c) Ad d ition:

101) In tru tion for the storage an han l n of a c s orie

9 Protection a ainst a ces to l v parts

18 Abnormal operation

This clau e of Part 1 is a plca le, ex e t as f ol ows:

18.8 Re la eme t of Ta le 4 b the fol l owing:

Table 4 – Re uire performa c le els

P wer switch – pre e t u wa te switc -o Sh l b e alu te u in th fa lt c n itio s of 18.6.1

with ut th lo s of this SCF

P wer switch – pro id d sire switc -of

Sh l b e alu te u in th fa lt c n itio s of 18.6.1

with ut th lo s of this SCF

An ele tro ic c ntrol to p s th te t of 8.3 c

Ov rs e d pre e tio to pre e t o tp t s e d a o e

12 % of ate (n -lo d) s e d

c

L c -of f un tio a re uire b 21.18.2.3 b

Pre e t e c e in th rmal lmits a in Cla s 18 a

19 Mechanical hazards

This clau e of Part 1 is a plca le, ex e t as fol ows:

The to l s al b desig ed so as to prevent ex es ive sp ed u der normal us The sp ed of

the to l s al not ex e d the rate no-loa spe d u der an o eratin con ition

Compl ian e is c e k d b insp ction a d b me suring t he sp ed after t he t ool is o erated

for a p riod of 5 min Th re omme d ed a c s ory th t prod uc s t he ma imum sp ed sh ll

b inst al led

I f the tool is pro id ed with a lo d se sitiv sp ed c ntrol , t he a a c s ory n ed n t b

inst alled to lo d the tool to find max imum sp ed

19.7 Ad d it ion l su cla ses:

19.7.101 The c t of f ma hine s al b con tru ted so that d rin forese a le mis se

o eration it wi not tip over

Compl ian e is c e k ed b the foll owin t es Th tool is as embl ed in a c rd an e wit h

8.14.2 a) 2)

Th cut-of ma hine, with ut b ing fix ed to t he su p rting sura e, is pla ed o a h rizo tal

med ium d ensity fibre o rd (MDF ) with a de sity of 650 k g/m

3

to 850 kg/m

3

se ured in the p sition cl osest to the piv t Witho t a y workpie e mo nted, t he cutin u it

is mo ed down t o its l owest c tting p sition, a d t he t he h nd l e is rel eased Th cut-of

ma hine sh ll n t tip over

19.7.10 Cut of f ma hine s al b provided with me n to f aci tate the fixin of the

mac ine to a b n h to prevent sl din , e.g by providin holes or clampin s rf aces in the

b se

Compl ian e is c e k d b insp ctio

19.101 Whe l guarding

19.101.1 Ge eral

To ls s al b provided with a g ardin s stem to protect the u er d rin normal us again t:

– ac idental contact with the a rasive prod ct;

– ejection of f agments of the a rasive prod ct;

– sp rk an other de ris

The wh el gu rd s al fulf il the fol owin req irements:

– to c an e the whe l, it s al not b neces ary to remove the whe l guard fom the to l;

– b desig ed to faci tate e s re lacement of the whe l For this purp se, p rts of the

whe l guard may b o ened without the aid of a to l provided these p rts remain

at ac ed to the whe l guard together with an f asteners;

– b desig ed so that the ris of an ac idental contact b twe n the o erator an the whe l

d rin normal us is minimized

The in tal ation of an oversized whe l s al b restricted in at le st one location by a device

fixed in relation to the spindle The cle ran e b twe n the p riphery of a new whe l with

diameter D an this device s al b 12 mm maximum

The g ardin s stem s al comply with the req irements of 19.101.2 an 19.101.3

Compl ian e is c e k d b insp ctio a d b me sureme t

19.101.2 Whe l guard d sign re uireme ts

19.101.2.1 To ls s al b provided with a combination of fixed an mova le whe l g ards

that covers the are s 1, 2 an 3 of the to l as s own in Fig re 10

When the c t ing unit is in the f ul y down p sition, are 1 is the are a ove a l ne p ral el

with the b se whic intersects the centre of the whe l For an p sition of the c t ing unit,

the sides an p riphery of the whe l, ex e t the spin le en , the n t an the outer fla ge,

s al b g arded in are 1

If the spin le en , the n t an the outer fla ge are not circ lar, they s al also b g arded

When the c t ing unit is in the re t position, are 2 is the are at the font of the to l

b twe n are 1 an at le st 15° (an le β in Fig re 10 b) b low a l ne p ral el with the b se

whic intersects the centre of the whe l In re t position, the are 2 s al b g arded by a

whe l g ard whic protects the p riphery an b th sides of at le st the outer 2 % of the

radiu of the whe l

When the c t ing u it is in the ful y down p sition, are 3 is the are at the b c of the to l

b twe n are 1 an at le st 15° (an le α in Fig re 10 a) b low a l ne p ral el with the b se

whic intersects the centre of the whe l In the f ul y down p sition, the are 3 s al b

g arded by a whe l guard whic protects the p riphery an b th sides of at le st the outer

10 % of the radiu of the whe l

Complian e is c e k d b insp ct io a d b me sureme t

When for tec nical re son an overla pin oc urs b twe n the fixed an the mova le whe l

guard, care s al b taken to prevent ac es to the whe l in the overla pin are

Complian e is c e ked b a plying th t est pro e of Figure 10 wit h a forc n t ex ce d in

5 N b twe n t he fix ed whe l guard a d t he mo a l e whe l g ard in a p sitio s I sh l l n t

b p s ible t o c nt act t he wh el wit h the test pro e

The mova le whe l guard s al b either:

– “l n activated” complying with the req irements of 19.101.2.2; or

– “workpiece activated” complyin with the req irements of 19.101.2.3

When the han le is rele sed, the c t ing unit s al return automatical y to its re t position

an the g ardin of are 2 s al b restored

NOT Mo a le g ards of this ty e are als k own a s lf e torin g ards

19.101.2.2 For a l n activated wh el guard, the movement of the mova le whe l gu rd

s al b ln ed with or control ed by the motion of the c t ing unit The down directed

plu gin action of the c t ing unit’s motion s al cau e the o enin stroke of the mova le

wh el gu rd However, the mova le wh el guard s al b fe to o en further in e en ent

of the l n , provided this ad itional movement is self restorin

Compl ian e is c e k d b insp ct io

19.101.2.3 A workpiece activated whe l guard s al o en when it makes contact with the

b se or the workpiece an may remain in contact with the b se or the workpiece d rin the

c t in action

NOT In s me c s s, s c a wh n c tin a smal work ie e, th whe l g ard wi n t b a tiv te

Compl ian e is c e k d b insp ct io a d b me sureme t

19.101.3 Guarding of whe l below the table

Cut of f ma hine s al b g arded so that ac es to the c t in whe l b low the ta le is

prevented

Complian e is c e k d b placin th to l o a h rizo tal flat sura e a d a plying t he t est

prob of Figure 10 with a forc n t ex ce d ing 5 N with t he cut ing unit in its fu y d own

p sitio I sh l n t b p s ible to c nta t the whe l with t he test pro e

Compl ian e is c e k ed b i nsp ctio a d b me sureme t

19.10 Spark def le tion

Sp rk emit ed in a re rward direction that oc ur in the are sp cif ied by the an le β whic is

b twe n the two tan ent l nes 1 (T1) an 2 (T2) as s own in Fig re 10 s al b contained or

deflected downward