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CEN

EN 847-3:2013

(Main)

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

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
08-Oct-2013
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
Start Date
03-Nov-2020
Completion Date
14-Apr-2025
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

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

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.

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

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.
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.
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]
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.
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 clamping device 5.4

5 Design requirements
5.1 General
Clamping devices shall be designed and made of such materials that they withstand the forces and loads
expected during operation.
Verification: By test procedure described in 5.5.3.
NOTE For the calculation of the shank strength, see EN 847-2.
In the area of the mounted surface, clamping devices shall be compatible to woodworking tools.
5.2 Hydrostatic clamping devices with open system
Hydrostatic clamping devices with open system shall be designed to retain the tool in the clamping device in
the event of the loss of pressure, e.g. by an additional mechanical locking.
Verification: By checking the relevant drawings and visual inspection of the clamping device.
5.3 Shape
The cross-section of clamping devices shall have a circular form perpendicular to the axis of rotation.
The following exceptions of the circular form are permissible:
 thread holes for fixing, balancing screws and balancing holes;
 widths across flats;
 shape and dimensions according to the sizes of the wrenches;
 balancing flats for systems with flatted tool shanks.
Verification: By checking the relevant drawings, measurement and visual inspection of the clamping device.
5.4 Balance
Clamping devices having a mass greater than 0,5 kg shall be balanced.
Clamping devices with keyways inside the bore shall be balanced without keys and clamping devices with
ke
...

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—     additional workpiece vacuum clamping device;
—     antistatic bar unit.
NOTE 1        An antistatic bar is a device that eliminates electrostatic charges on the workpiece to ease its subsequent cleaning from dust by airflow.
This document is also applicable to machines fitted with a laser engraving unit, but the specific hazards of this unit have not been dealt with.
The machines are designed to process workpieces with flat surface and even thickness, in shape of panels or beams or frames, consisting of:
a)       solid wood;
b)       material with similar physical characteristics to wood (see ISO 19085-1:2021, 3.2);
c)        gypsum boards, gypsum bounded fibreboards;
d)       composite materials with core consisting of, e.g. polyurethane or mineral material;
e)       composite boards made from the materials listed above;
f)         all materials listed above, already lacquered.
This document does not deal with hazards related to:
—     specific devices other than those listed above;
—     access through in-feed and out-feed openings of machines with a work piece height capacity greater than 700 mm;
—     systems for powered loading or unloading, or both, of the workpiece to or from a single machine;
NOTE 2        Loading the machine manually includes manually placing the workpiece onto a conveyor directly controlled by the machine. Unloading the machine manually includes manually removing the workpiece from a conveyor directly controlled by the machine.
—     out-feed workpieces on machines with feed speed higher than 60 m/min;
—     interfacing of the machine with any other machine.
This document is not applicable to machines intended for use in a potentially explosive atmosphere and to machines manufactured prior to the date of its publication.

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EN ISO 19085-6:2024(Main)
Woodworking machines - Safety - Part 6: Single spindle vertical moulding machines (toupie) (ISO 19085-6:2024)
SIST EN ISO 19085-6:2024

This document specifies the safety requirements and measures for single spindle vertical moulding machines (defined in 3.1), capable of continuous production use and hereinafter referred to also as “machines”.
The machines are designed to cut solid wood and material with similar physical characteristics to wood.
This document deals with all significant hazards, hazardous situations and events as listed in Annex A, relevant to the machines when they are operated, adjusted and maintained as intended and under the conditions foreseen by the manufacturer including reasonably foreseeable misuse. Transport, assembly, dismantling, disabling and scrapping phases have also been taken into account.
This document is also applicable to machines fitted with one or more of the following devices/additional working units, whose hazards have been dealt with:
a)       device to adjust the arbor vertically;
b)       device to tilt the arbor;
c)        device to fit a manually operated tenoning sliding table;
d)       glass bead saw unit;
e)       adjustable table insert;
f)         device for changing the direction of rotation of the spindle;
g)       device for fixing shank mounted tools on the arbor;
h)       interchangeable arbor;
i)         quick tool/arbor change system;
j)         demountable power feed unit;
k)       support for the demountable power feed unit with power-driven adjustments.
This document does not apply to
—     machines equipped with outboard bearings,
—     machines equipped with powered movements of a front extension table and/or a tenoning sliding table.
This document is not applicable to machines intended for use in potentially explosive atmospheres or to machines manufactured prior to the date of its publication.

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EN ISO 19085-3:2021(Main)
Woodworking machines - Safety - Part 3: Numerically controlled (NC/CNC) boring and routing machines (ISO 19085-3:2021)
SIST EN ISO 19085-3:2022

This document gives the safety requirements and measures for numerically controlled (NC/CNC) boring machines, NC/CNC routing machines and NC/CNC boring and routing machines (as defined in 3.2, 3.3 and 3.4), capable of continuous production use, hereinafter referred to as "machines".
This document deals with all significant hazards, hazardous situations and events, listed in Annex A, relevant to the machines when they are operated, adjusted and maintained as intended and under the conditions foreseen by the manufacturer including reasonably foreseeable misuse. Also, transport, assembly, dismantling, disabling and scrapping phases have been taken into account.
This document is also applicable to machines fitted with one or more of the following devices/additional working units, whose hazards have been dealt with:
—    additional working units for sawing, sanding, assembling or dowel inserting;
—    fixed or movable workpiece support;
—    mechanical, pneumatic, hydraulic or vacuum workpiece clamping;
—    automatic tool change devices.
It is also applicable to machines fitted with edge-banding equipment, even if the relevant specific hazards have not been dealt with.
NOTE      For the risk assessment needed for the edge-banding equipment, ISO 19085-17 can be useful.
Machines covered in this document are designed for workpieces consisting of:
—    solid wood;
—    material with similar physical characteristics to wood (see ISO 19085-1:2021, 3.2);
—    gypsum boards, gypsum bounded fibreboards, cardboard;
—    matrix engineered mineral boards, silicate boards;
—    composite materials with core consisting of polyurethane or mineral material laminated with light alloy;
—    polymer-matrix composite materials and reinforced thermoplastic/thermoset/elastomeric materials;
—    aluminium light alloy profiles;
—    aluminium light alloy plates with a maximum thickness of 10 mm;
—    composite boards made from the materials listed above.
This document does not deal with specific hazards related to:
—    use of grinding wheels;
—    ejection through openings guarded by curtains on machines where the height of the opening in the enclosure above the workpiece support exceeds 700 mm;
—    ejection due to failure of milling tools with a cutting circle diameter equal to or greater than 16 mm and sawing tools not conforming to EN 847‑1:2017 and EN 847‑2:2017;
—    the combination of a single machine being used with other machines (as a part of a line);
—    integrated workpiece loading/unloading systems (e.g. robots).
This document is not applicable to:
—    single spindle hand fed or integrated fed routing machines;
—    machines intended for use in potentially explosive atmosphere;
—    machines manufactured prior to its publication.

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EN ISO 19085-16:2021(Main)
Woodworking machines - Safety - Part 16: Table band saws and band re-saws (ISO 19085-16:2021)
SIST EN ISO 19085-16:2022

This document gives the safety requirements and measures for table band saws and band resaws, with manual loading and/or unloading and suitable for continuous production use, hereinafter referred to as “machines”.
The machines are designed to cut solid wood and material with similar physical characteristics to wood.
It deals with all significant hazards, hazardous situations and events, listed in Annex A, relevant to the machines, when operated, adjusted and maintained as intended and under the conditions foreseen by the manufacturer; reasonably foreseeable misuse has been considered too. Also, transport, assembly, dismantling, disabling and scrapping phases have been taken into account.
It is also applicable to machines fitted with one or more of the following devices/additional working units, whose hazards have been dealt with:
a) device to tilt the table;
b) device to tilt the saw unit.
This document does not apply to:
1)    machines driven by combustion engines or power take offs (PTO);
2)    log band sawing machines;
NOTE Log band sawing machines are covered by EN 1807-2:2013.
3)    horizontal band saws and band resaws;
4)    machines designed for cross-cutting of firewood.
This document does not deal with hazards related to the combination of a single machine being used with any other machine (as part of a line).
This document is not applicable to machines intended for use in potentially explosive atmospheres or to machines manufactured prior to the date of its publication.

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