EN 847-3:2013

Tools for woodworking - Safety requirements - Part 3: Clamping devices

This European Standard specifies all hazards arising from the use of clamping devices for the fastening of milling tools and circular saw blades on woodworking machines and specifies the methods for the elimination or reduction of these hazards by the design of the clamping device and by the provision of information.
This European Standard does not apply to arbors for spindle moulding machines in accordance with EN 848 1 or to clamping flanges for circular sawing blades to be used on circular sawing machines in accordance with the standard series EN 1870 and does not cover hazard related to the connection of the clamping device with the machine.
Bore mounted tools which are mounted on an interchangeable arbor should be considered as a shank mounted tool.
NOTE   For definition of "woodworking machines", see EN 847 1.

Maschinen-Werkzeuge für Holzbearbeitung - Sicherheitstechnische Anforderungen - Teil 3: Spannzeuge

Diese Europäische Norm legt alle Gefährdungen fest, die von der Verwendung von Spannzeugen zum Befestigen von Fräswerkzeugen und Kreissägeblättern auf Holzbearbeitungsmaschinen herrühren, und legt die Verfahren für die Beseitigung oder Verringerung dieser Gefährdungen durch die Gestaltung des Spannzeuges und durch die Bereitstellung von Informationen fest.
Diese Europäische Norm ist nicht anwendbar für Fräserdorne für Tischfräsmaschinen nach EN 848 1 oder für Spannflansche für Kreissägeblätter zur Verwendung auf Kreissägemaschinen nach der Normenreihe EN 1870 und bezieht Gefährdungen bezüglich der Verbindung vom Spannzeug zur Maschine hin nicht ein.
Bohrungswerkzeuge, die auf einem Adapter, Aufnahmedorn oder Aufspanndorn befestigt oder eingespannt werden, sollten wie Schaftwerkzeuge betrachtet werden.
ANMERKUNG   Zur Definition von „Holzbearbeitungsmaschinen“, siehe EN 847 1.

Outils pour le travail du bois - Prescriptions de sécurité - Partie 3: Outils de serrage

La présente Norme européenne spécifie tous les phénomènes dangereux provenant de l’utilisation des outils de serrage pour la fixation des outils de fraisage et les lames des lames de scies circulaires sur les machines à bois et spécifie les méthodes d’élimination ou de réduction de ces phénomènes dangereux lors de la conception de l’outil de serrage et par la fourniture d’informations.
La présente Norme européenne ne s’applique pas aux axes des toupies conformes à l’EN 848-1 ou aux brides de serrage des lames de scies circulaires utilisées sur les machines à scier circulaires conformément à la série des normes EN 1870 et ne couvre pas les phénomènes dangereux relatifs à la connexion de l’outil de serrage avec la machine.
Il convient que les outils avec alésage montés ou serrés sur un adaptateur, un arbre ou un mandrin soient considérés comme des outils à queue.
NOTE   La définition d'une machine pour le travail du bois est donnée dans l'EN 847-1.

Orodja za obdelavo lesa - Varnostne zahteve - 3. del: Vpenjalne naprave

Ta evropski standard določa vse nevarnosti, ki izhajajo iz uporabe vpenjalnih naprav za pritrjevanje frezal in rezil krožnih žag na stroje za obdelavo lesa, in opisuje metode za zmanjšanje ali odpravo teh nevarnosti z zasnovo vpenjalne naprave in zagotavljanjem informacij. Ta evropski standard se v skladu s standardom EN 848-1 ne uporablja za stojala rezkalnikov ali za vpenjalne prirobnice rezil krožnih žag, predvidene za uporabo na krožnih žagah v skladu s standardom serije EN 1870, prav tako pa ne zajema nevarnosti, povezanih s priključitvijo vpenjalne naprave s strojem. Orodja, ki se pritrdijo v izvrtino in so pritrjena na zamenljivo stojalo, morajo biti obravnavana kot orodja, pritrjena na stojalo.

General Information

• Status: Published
• Publication Date: 30-Jan-2014
• Withdrawal Date: 29-Apr-2014
• ICS: 79.120.10 - Woodworking machines
• Technical Committee: CEN/TC 142 - Woodworking machines - Safety
• Drafting Committee: CEN/TC 142/WG 8 - Tooling
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Completion Date: 03-Nov-2020
• Ref Project: SIST EN 847-3:2014 - Tools for woodworking - Safety requirements - Part 3: Clamping devices

Relations

• Replaces: EN 847-3:2004 - Tools for woodworking - Safety requirements - Part 3: Clamping devices
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 847-3:2014
01-januar-2014
1DGRPHãþD
SIST EN 847-3:2004
Orodja za obdelavo lesa - Varnostne zahteve - 3. del: Vpenjalne naprave
Tools for woodworking - Safety requirements - Part 3: Clamping devices

Maschinen-Werkzeuge für Holzbearbeitung - Sicherheitstechnische Anforderungen - Teil

3: Spannzeuge

Outils pour le travail du bois - Exigences de sécurité - Partie 3: Outils de serrage

Ta slovenski standard je istoveten z: EN 847-3:2013
ICS:
79.120.10 Lesnoobdelovalni stroji Woodworking machines
SIST EN 847-3:2014 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 847-3:2014
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SIST EN 847-3:2014
EUROPEAN STANDARD
EN 847-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2013
ICS 79.120.10 Supersedes EN 847-3:2004
English Version
Tools for woodworking - Safety requirements - Part 3: Clamping
devices

Outils pour le travail du bois - Prescriptions de sécurité - Maschinen-Werkzeuge für Holzbearbeitung -

Partie 3: Outils de serrage Sicherheitstechnische Anforderungen - Teil 3: Spannzeuge

This European Standard was approved by CEN on 10 August 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same

status as the official versions.

CEN members are the national standards bodies of 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 847-3:2013: E

worldwide for CEN national Members.
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SIST EN 847-3:2014
EN 847-3:2013 (E)
Contents Page

Foreword ..............................................................................................................................................................3

Introduction .........................................................................................................................................................4

1 Scope ......................................................................................................................................................5

2 Normative references ............................................................................................................................5

3 Terms and definitions ...........................................................................................................................5

4 List of significant hazards ....................................................................................................................6

5 Design requirements .............................................................................................................................7

5.1 General ....................................................................................................................................................7

5.2 Hydrostatic clamping devices with open system ...............................................................................7

5.3 Shape ......................................................................................................................................................7

5.4 Balance ...................................................................................................................................................7

5.5 Testing ....................................................................................................................................................8

5.5.1 Test sample and dimensions ................................................................................................................8

5.5.2 Formulae and calculation .................................................................................................................. 10

5.5.3 Test procedure .................................................................................................................................... 10

5.6 Requirements on tolerances of clamping devices .......................................................................... 11

6 Marking of clamping devices ............................................................................................................. 11

6.1 General ................................................................................................................................................. 11

6.2 Marking of clamping devices for bore mounted tools .................................................................... 11

6.3 Marking of clamping devices for shank mounted tools ................................................................. 11

6.4 Marking of one piece clamping devices for shank mounted tools ................................................ 12

7 Information for use ............................................................................................................................. 12

7.1 General ................................................................................................................................................. 12

7.2 Safe working practice ......................................................................................................................... 12

Bibliography ..................................................................................................................................................... 13

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SIST EN 847-3:2014
EN 847-3:2013 (E)
Foreword

This document (EN 847-3:2013) has been prepared by Technical Committee CEN/TC 142 “Woodworking

machines - Safety”, the secretariat of which is held by UNI.

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 April 2014, and conflicting national standards shall be withdrawn at the

latest by April 2014.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 847-3:2004.
The following table contains a list of modifications from the previous edition.
EN 847-3:2004 EN 847-3:2013 Reason
3 Terms 3 Terms and definitions: ed/te
new headline
some new definitions
5 Safety requirements 5 Design requirements: ed
new numbering
7 Information for use 7 Information for use; with 7.2 Safe ed
working practice
Annex A: Safe work practice No Annex A ed
New: Bibliography ed

According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

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SIST EN 847-3:2014
EN 847-3:2013 (E)
Introduction

This European Standard specifies general requirements for the safety of clamping devices for machine tools for

woodworking.
It is addressed to manufacturers and it is useful for end users.
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SIST EN 847-3:2014
EN 847-3:2013 (E)
1 Scope

This European Standard specifies all hazards arising from the use of clamping devices for the fastening of

milling tools and circular saw blades on woodworking machines and specifies the methods for the elimination

or reduction of these hazards by the design of the clamping device and by the provision of information.

This European Standard does not apply to arbors for spindle moulding machines in accordance with EN 848-1

or to clamping flanges for circular sawing blades to be used on circular sawing machines in accordance with

the standard series EN 1870 and does not cover hazard related to the connection of the clamping device with

the machine.

Bore mounted tools which are mounted on an interchangeable arbor should be considered as a shank

mounted tool.
NOTE For definition of "woodworking machines", see EN 847-1.
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.

EN 847-1:2013, Tools for woodworking — Safety requirements — Part 1: Milling tools, circular saw blades

ISO 1940-1, Mechanical vibration — Balance quality requirements for rotors in a constant (rigid) state —

Part 1: Specification and verification of balance tolerances

ISO 10897, Collets for tool holders with taper ratio 1:10 — Collets, holders, nuts

ISO 15488, Collets with 8 degree setting angle for tool shanks — Collets, nuts and fitting dimensions

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 847-1:2013 and the following apply.

3.1
shank
part of the tool by which it is held
[SOURCE: ISO 3002-1:1982, 3.2.2]
3.2
shank mounted tool
tool with a shank
3.3
bore mounted tool
tool with a bore for mounting
3.4
tool bore

that bore in a tool by which it can be located and fixed by a spindle, arbour or mandrel

[SOURCE: ISO 3002-1:1982, 3.2.3]
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SIST EN 847-3:2014
EN 847-3:2013 (E)
3.5
clamping device

element for fixing the tool on the driving spindle of the woodworking machine, for transferring the torque of the

driving spindle and for positioning of the tool
3.5.1
friction lock clamping device

clamping device where the connection between tool and clamping device as well as the positioning of the tool

is achieved by friction lock fixing elements (e.g. by spring tensions, gripping elements, hydrostatic clamping

elements)
3.5.1.1
clamping device with mechanical clamping fixture

clamping device where gripping of the tool in the clamping device is performed mechanically, e.g. by spring

tension, gripping elements
3.5.1.2
clamping device with hydrostatic clamping fixture

clamping device where gripping of the tool in the clamping device is performed hydrostatically, e.g. by

hydrostatic clamping elements
3.5.1.2.1
hydrostatic clamping element

element which neutralises tolerances between the woodworking tool and the clamping device by elastic

deformation
Note 1 to entry: The deformation is generated by hydrostatic pressure.
3.5.1.2.2
open system clamping device

clamping device where the clamping medium (incompressible fluid, e.g. oil, grease) can escape when

released and is supplied from the outside when clamped
3.5.1.2.3
close system clamping device

clamping device where the clamping medium is permanently and pressure-tightly retained in the system

3.5.1.3
one piece clamping device

solid clamping device where the clamping force is generated by the elasticity of its material, e.g. shrink chuck

3.5.2
form lock clamping device

clamping device where the connection between tool and clamping device is achieved by form lock fixing

elements, e.g. bayonet type clamping, flatted cylindrical shanks
3.6
maximum rotational speed

maximum rotational speed for the operation for which the clamping device is designed

4 List of significant hazards
Table 1 shows the list of significant hazards.
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SIST EN 847-3:2014
EN 847-3:2013 (E)
Table 1 — List of significant hazards
Corresponding
Condition or causes of the hazard related
Hazard clause of
to the clamping device
EN 847-3
Incorrect assembly of the clamping device 5.6
Modification of tool position relative to the clamping 7.2
device
Ejection of parts Dynamic unbalance of the clamping device while rotating 5.4
Loosening of the tool in/on the clamping device during 7.2
machining
Fastening of the clamping device on the driving spindle 7.2
Vibrations Dynamic unbalance of the clamp
...