SIST EN 13743:2017

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Varnostne zahteve za brusna sredstva na podlagahSicherheitsanforderungen für Schleifmittel auf UnterlagenPrescriptions de sécurité pour les produits abrasifs appliquésSafety requirements for coated abrasive products25.100.70BrusivaAbrasivesICS:Ta slovenski standard je istoveten z:EN 13743:2017SIST EN 13743:2017en,fr,de01-marec-2017SIST EN 13743:2017SLOVENSKI
STANDARDSIST EN 13743:20091DGRPHãþD



SIST EN 13743:2017



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13743
January
t r s y ICS
t wä s r rä y r Supersedes EN
s u y v uã t r r {English Version
Safety requirements for coated abrasive products Prescriptions de sécurité pour les produits abrasifs appliqués
Sicherheitsanforderungen für Schleifmittel auf Unterlagen This European Standard was approved by CEN on
s v November
t r s xä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s u y v uã t r s y ESIST EN 13743:2017



EN 13743:2017 (E) 2 Contents Page European foreword . 3 Introduction . 4 1 Scope . 5 2 Normative references . 5 3 Terms and definitions . 5 3.1 General . 5 3.2 Grinding machines . 5 3.3 Type of application . 6 3.3.1 General . 6 3.4 Symbols . 7 4 List of significant hazards . 7 5 Safety requirements . 8 5.1 General requirements . 8 5.1.1 General . 8 5.1.2 Sequence of maximum operating speeds . 8 5.2 Safety factors. 9 5.2.1 Safety factors for flap wheels, flap discs and vulcanised fibre discs . 9 5.2.2 Safety factors for spindle mounted flap wheels . 9 5.2.3 Safety factor for back-up pads for vulcanised fibre discs . 9 5.3 Dimensional limitations and maximum operating speeds . 9 5.4 Marking . 11 6 Verification of the safety requirements . 11 6.1 Verification of the general requirements . 11 6.2 Verification of the safety factor . 11 6.3 Verification of the dimensional requirements . 12 6.4 Verification of the marking . 12 7 Information for use . 12 Annex A (normative)
Marking . 13 A.1 Content of marking . 13 A.1.1 Marking requirements . 13 A.1.2 Additional inscriptions . 15 A.2 Execution of marking . 15 Annex B (normative)
Colour codes . 16 Annex C (informative)
Speed conversion table . 17 Bibliography . 18
SIST EN 13743:2017



EN 13743:2017 (E) 3 European foreword This document (EN 13743:2017) has been prepared by Technical Committee CEN/TC 143 “Machine tools - Safety”, the secretariat of which is held by SNV. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2017, and conflicting national standards shall be withdrawn at the latest by July 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13743:2009. Significant changes against EN 13743:2009 are as follows: a) the scope was clarified and the types of permissible abrasive grains were specified; b) Table 3 was updated with additional hazard designations; c) Table 5 was revised according to current scientific and technical knowledge; d) Clause 7 was modified in order to avoid overlap with European legislation; e) the short signs on the restriction of use were removed from Annex A. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 13743:2017



EN 13743:2017 (E) 4 Introduction This European Standard has been prepared to provide one means of conforming to essential safety requirements, e.g. of the General Product Safety Directive and associated EFTA regulations. This European Standard is addressed to manufacturers, suppliers and importers of the coated abrasive products and back-up pads described in the scope. In addition, it helps manufacturers, suppliers and importers of grinding machines in the selection of abrasive products, in order to reduce the risks and achieve conformity of the respective machinery with the Essential Safety Requirements of the Machinery Directive. The extent to which hazards are covered is indicated in the scope of this European Standard. SIST EN 13743:2017



EN 13743:2017 (E) 5 1 Scope This European Standard is applicable to the following coated abrasive products and a combination of coated and non-woven abrasive products: flap wheels, flap discs, vulcanised fibre discs and spindle mounted flap wheels. It also applies to back-up pads for vulcanised fibre discs. These products are manufactured using the following abrasive grains: aluminium oxide, silicon carbide, diamond, or CBN. This European Standard specifies requirements and/or measures for removal or reduction of hazards resulting from the design and application of the coated abrasive products and clamping devices. This European Standard also contains procedures and tests for verification of compliance with the requirements as well as safety information for use, which is to be made available to the user by the manufacturer. The hazards taken into consideration are listed in Clause 4 of this standard. This European Standard does not apply to abrasive products entirely of non-woven web. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 554, Standard atmospheres for conditioning and/or testing — Specifications 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 General 3.1.1 coated abrasive product abrasive product composed of backing, abrasive particles and bond and optionally a supporting element Note 1 to entry: Examples for supporting elements are pads and spindles. 3.1.2 clamping device device for fixing and positioning the abrasive product on the spindle of the grinding machine Note 1 to entry: Clamping devices include e.g. back-up pads for vulcanised fibre discs, and clamping flanges for flap wheels. 3.2 Grinding machines 3.2.1 stationary grinding machine grinding machine being fixed in position during operation Note 1 to entry: See for example EN ISO 16089. SIST EN 13743:2017



EN 13743:2017 (E) 6 3.2.2 mobile grinding machine grinding machine not being fixed in position during operation Note 1 to entry: Mobile grinding machines are manually guided (but not supported) by hand during use, e.g. floor grinding machines. 3.2.3 hand-held grinding machine grinding machine being held in the hand during the grinding process Note 1 to entry: See for example EN ISO 11148-7, EN ISO 11148-9, EN 60745–2–3 and EN ISO 19432. 3.3 Type of application 3.3.1 General See Table 1. 3.3.2 mechanically guided grinding grinding process with feed movements of the abrasive product and/or workpiece guided by mechanical means 3.3.3 manually guided grinding grinding process with feed movements of the abrasive product and/or the workpiece manually guided by the operator 3.3.4 hand-held grinding grinding process with grinding machine entirely guided by the operator's hands Table 1 — Type of application Type of machine Type of application Abrasive product Workpiece Stationary grinding machines Mechanically guided grinding Fixed Guided mechanically Guided mechanically Fixed Guided mechanically Guided mechanically Stationary and mobile grinding machines Manually guided grinding Guided by hand Fixed Fixed Guided by hand Hand-held grinding machines Hand-held grinding Guided by hand Fixed SIST EN 13743:2017



EN 13743:2017 (E) 7 3.4 Symbols The symbols used in this European Standard are listed in Table 2. Table 2 — Symbols Symbol Designation Definition Unit nab Deflection speed of a spindle mounted flap wheel Revolutions per minute at which the spindle of a rotating spindle mounted flap wheel is deflecting under centrifugal force 1/min nmax Maximum permissible speed of rotation Revolutions per minute of a rotating new abrasive product at maximum operating speed 1/min Sab Safety factor against spindle deflection for a spindle mounted flap wheel Deflection speed divided by maximum permissible speed of rotation: abab=maxnSn — vs Maximum operating speed Maximum permissible peripheral speed of a rotating abrasive product m/s vbr Bursting speed Peripheral speed at which a rotating abrasive product breaks due to centrifugal force m/s vbr min Minimum bursting speed Peripheral speed, which a rotating abrasive product shall at least reach without bursting due to centrifugal force m/s fbr Burst speed factor Bursting speed divided by maximum operating speed:
brrs=bvfv — Sbr Safety factor against bursting due to centrifugal force Bursting speed divided by maximum operating speed, all squared:
brbrs=2vSv — 4 List of significant hazards The significant hazards are given in Table 3. SIST EN 13743:2017



EN 13743:2017 (E) 8 Table 3 — List of significant hazards Hazard designation Hazardous situation (Examples) Relevant clauses
in the standard Ejection of parts 1. Abrasive product breakage caused by:
— improper design 5.1, 5.2, 5.3 and 5.4
— manufacturing defects 5.1
— wrong selection 5.4, Clause 7 and Annex A
— improper handling and storage Clause 7
— improper use (mountin
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