SIST EN 792-9:2001+A1:2008

SLOVENSKI STANDARD
SIST EN 792-9:2001+A1:2008
01-november-2008
1HHOHNWULþQDURþQDRURGMD9DUQRVWQH]DKWHYHGHO%UXVLOQLNL
Hand-held non-electric power tools - Safety requirements - Part 9: Die grinders
Handgehaltene nicht-elektrisch betriebene Maschinen - Sicherheitsanforderungen - Teil
9: Schleifmaschinen für Schleifstifte
Machines portatives à moteur non électrique - Prescriptions de sécurité - Partie 9:
Meuleuses d'outillage
Ta slovenski standard je istoveten z: EN 792-9:2001+A1:2008
ICS:
25.140.10 3QHYPDWLþQDRURGMD Pneumatic tools
SIST EN 792-9:2001+A1:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 792-9:2001+A1:2008

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SIST EN 792-9:2001+A1:2008


EUROPEAN STANDARD
EN 792-9:2001+A1

NORME EUROPÉENNE

EUROPÄISCHE NORM
September 2008
ICS 25.140.10; 25.140.99 Supersedes EN 792-9:2001
English Version
Hand-held non-electric power tools - Safety requirements - Part
9: Die grinders
Machines portatives à moteur non électrique - Prescriptions Handgehaltene nicht-elektrisch betriebene Maschinen -
de sécurité - Partie 9: Meuleuses d'outillage Sicherheitsanforderungen - Teil 9: Schleifmaschinen für
Schleifstifte
This European Standard was approved by CEN on 1 December 2000 and includes Amendment 1 approved by CEN on 26 July 2008.

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 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 Management Centre has the same status as the
official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.






EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 792-9:2001+A1:2008: E
worldwide for CEN national Members.

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SIST EN 792-9:2001+A1:2008
EN 792-9:2001+A1:2008 (E)
Contents Page
Foreword.3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
3.1 General terms and definitions.6
3.2 Terms and definitions related to die grinders .7
4 List of hazards.8
5 Safety requirements and measures.9
5.1 Mechanical safety .9
5.2 Thermal safety.9
5.3 Noise .9
5.4 Vibration .10
5.5 Materials and substances processed, used or exhausted.10
5.6 Ergonomics .11
5.7 Safety related measures and means.11
6 Information for use .12
6.1 Marking, signs and written warnings.12
6.2 Instruction for use .12
7 Verification .15
7.1 Noise .15
7.2 Vibration .15
7.3 Unintentional start .15
7.4 Structure of verification .16
Safety requirement .16
Annex A (informative) Examples of die grinders covered by this part of EN 792 .17
Annex B (informative) Symbols for labels and signs .18
Annex C (informative) Examples of abrasive products used with die grinders .19
Annex ZA (informative) !Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC".20
Annex ZB (informative) !Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC".21
Bibliography .22

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SIST EN 792-9:2001+A1:2008
EN 792-9:2001+A1:2008 (E)
Foreword
This document (EN 792-1:2000+A1:2008) has been prepared by Technical Committee CEN/TC 255 ”Hand-
held, non-electric power tools - Safety", the secretariat of which is held by SIS.
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 March 2009, and conflicting national standards shall be withdrawn at
the latest by December 2009.
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive(s).
!For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this
document."
This document includes Amendment 1, approved by CEN on 2008-07-26.
This document supersedes EN 792-9:2001.
The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ".
The "European Committee of Manufacturers of Compressors, Vacuum Pumps and Pneumatic Tools",
PNEUROP, has given substantial contributions to this standard.
The standard has been created in close co-operation with CENELEC/TC 61F with the aim of achieving
requirements for mechanical safety in the EN 50144 series, which are similar for hand-held electric and non-
electric power tools.
NOTE Other technical committees in CEN dealing with hand-held power tools have been asked to follow the safety
requirements as in EN 792.
The annexes to this part of the standard are:
Annex A (informative) Examples of power tools covered by this part
Annex B (informative) Labels, signs and tags
Annex C (informative) Examples of abrasive products used with die grinders
!Annexes ZA and ZB" (informative) Relationship of this European Standard with EU Directives.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.


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SIST EN 792-9:2001+A1:2008
EN 792-9:2001+A1:2008 (E)
Introduction
This European standard is a type C standard as stated in EN 1070:1998.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered are
indicated in the scope of this standard.
When provisions of this type C standard are different from those which are stated in type A or B standards, the
provisions of this type C standard take precedence over the provisions of other standards, for machines that
have been designed and built according to the provisions of this type C standard.
EN 792 consists of a number of independent parts for individual types of hand-held non-electric power tools.
Other european standards deal with safety rules for hand-held power tools used in e. g. the following fields:
 agriculture and forestry such as chain saws, hedge-trimmers, brush cutters, grass trimmers;
 construction and building such as cutting-off power tools, concrete vibrators;
 food industry, such as fowl secateurs, sheep shears.
Endeavours have been made to achieve co-ordination with the relevant Technical Committees so that the
safety requirements are compatible.
This standard is divided in the following parts:
Part 1: Assembly power tools for non-threaded mechanical fasteners (former part 14)
Part 2: Cutting-off and crimping power tools (former part 15)
Part 3: Drills and tappers
Part 4: Non rotary percussive power tools
Part 5: Rotary, percussive power drills
Part 6: Assembly power tools for threaded fasteners
Part 7: Grinders
Part 8: Sanders and polishers
Part 9: Die grinders
Part 10: Compression power tools
Part 11: Nibblers and shears
Part 12: Small circular, small oscillating and reciprocating saws
Part 13: Fastener driving tools
Certain parts of EN 792 cover hand-held non-electric power tools, driven by internal combustion engines
powered by gaseous or liquid fuel. In these parts, the safety aspects relating to internal combustion engines
are found in a normative annex.
The parts are type C standards and refer to pertinent European Standards of type A and B where such
standards are applicable.
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SIST EN 792-9:2001+A1:2008
EN 792-9:2001+A1:2008 (E)
1 Scope
EN 792 applies to hand-held non-electric power tools driven by rotary or linear motors, powered by
compressed air, hydraulic fluid and intended to be used by one operator and supported by:
 the operator's hand or hands;
 a suspension, e. g. a balancer.
This part of EN 792 applies to hand-held, non-electric power tools fitted with collets and used for grinding and
surface finishing and chamfering using mounted points, burrs and files and small wire brushes mounted on
shafts. This part lists the significant hazards caused by such power tools and specifies safety requirements
valid for different aspects of safety during their foreseeable lifetime.
NOTE Grinders without collets for use with cones and plugs with threaded inserts are covered by EN 792-7.
Power tools covered by this part of the standard:
 angle die grinders;
 reciprocating files;
 rotary files;
 straight die grinders.
Special requirements and modifications on a hand-held power tool for the purpose of mounting it in a fixture
are not covered by this part.
NOTE At the date of publication no die grinders driven by internal combustion engines are known.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to
this European Standard only when incorporated in it by amendment or revision. For undated references the
latest edition of the publication referred to, applies (including amendments).
EN 292-1:1991, Safety of machinery - Basic concepts, general principles for design – Part 1: Basic
terminology, methodology
EN 292-2:1991, Safety of machinery - Basic concepts, general principles for design – Part 2: Technical
principles and specifications
EN 563, Safety of machinery - Temperatures of touchable surfaces - Ergonomics data to establish
temperature limit values for hot surfaces
EN 614-1, Safety of machinery - Ergonomic design principles – Part 1: Terminology and general principles
EN 1070:1998, Safety of machinery - Terminology
EN 1127-1, Explosive atmospheres – Explosion prevention and protection – Part 1: Basic concepts and
methodology
EN 12096, Mechanical vibration - Declaration and verification of vibration emission values
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SIST EN 792-9:2001+A1:2008
EN 792-9:2001+A1:2008 (E)
EN ISO 4871, Acoustics - Declaration and verification of noise emission values of machinery and equipment
(ISO 4871:1996)
EN ISO 8662-13, Hand-held portable power tools - Measurement of vibration at the handle – Part 13: Die
grinders (ISO 8662-13:1997)
EN ISO 14163, Acoustics – Guidelines for noise control by silencers (ISO 14163:1998)
!EN ISO 15744:2008, Hand-held non-electric power tools – Noise measurement code – Engineering
method (grade 2) (ISO 15744:2002)"
EN 28662-1, Hand-held portable power tools - Measurement of vibration at the handle – Part 1: General (ISO
8662-1:1988)
ISO 3857-3:1989, Compressors, Pneumatic tools and machines, Vocabulary – Part 3: Pneumatic tools and
machines.
ISO 5391:1988, Pneumatic tools and machines – Vocabulary
3 Terms and definitions
For the purposes of this part of the standard, the following terms and definitions apply.
3.1 General terms and definitions
3.1.1
hand-held power tool
machine driven by rotary or linear motors powered by compressed air, hydraulic fluid, gaseous or liquid fuel,
electricity or stored energy (e.g. by a spring) to do mechanical work and so designed that the motor and the
mechanism form an assembly that can easily be brought to its place of operation. The hand-held power tool is
operated by one or two hands.
NOTE Hand-held power tools driven by compressed air or gas are called pneumatic tools.
Hand-held power tools driven by hydraulic liquid are called hydraulic tools.
3.1.2
rotary power tool
hand-held power tool, the machine spindle of which rotates
3.1.3
inserted tool
tool inserted in the hand-held power tool to perform the intended work
3.1.4
service tool
tool intended for performing maintenance or service on the hand-held power tool
3.1.5
control device
device to start and stop the hand-held power tool or to change the direction of the rotation or to control the
functional characteristics such as speed and power
3.1.6
maximum operating pressure
maximum pressure that a hand-held power tool may be operated at, as specified by the manufacturer
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SIST EN 792-9:2001+A1:2008
EN 792-9:2001+A1:2008 (E)
3.2 Terms and definitions related to die grinders
3.2.1
die grinder
rotary power tool intended for chamfering, deburring, and light cleaning operations and fitted with inserted
tools mounted in collet chucks
NOTE A die grinder with a burr is often called a rotary file.
3.2.2
collet chuck
device for attaching the inserted tool by clamping the shank
3.2.3
machine spindle
rotating part of a die grinder, driving the collet chuck and consequently the inserted tool
3.2.4
rated speed, r/min
maximum rotational speed of the machine spindle, in revolutions per minute under operating conditions with
the inserted tool mounted and at the upper limit of the energy supply, e.g. pressure or flow, as specified by the
manufacturer
3.2.5
maximum operating speed
maximum peripheral speed of an abrasive product, given in m/s, as specified by the manufacturer of the
abrasive product
3.2.6
reciprocating file
power tool with a rotary or reciprocating motor driving a file in a reciprocating motion.
For other terms, see EN 1070:1998 and also ISO 3857-3:1989 and ISO 5391:1988.
For examples of die grinders see annex A.
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SIST EN 792-9:2001+A1:2008
EN 792-9:2001+A1:2008 (E)
4 List of hazards
The following hazards can occur in the use of die grinders.
Hazard type Reference to safety requirement
By design or Information
guarding for use
4.1 Mechanical hazards
- cutting   5.1.1
- drawing in or trapping (caused by hair, clothing etc. 6.2.2
getting entangled in a rotating power tool)

- friction or abrasion hazard
5.1.1
- loss of stability
5.1.2
- whipping hose
6.2.2
- ejection from high pressure hydraulic systems
5.1.4
- ejection of parts
5.1.5
- hose and hose coupling specifications
6.2.2
4.2 Electrical hazards 6.2.2
4.3 Thermal hazards
- explosions 5.2 6.2.2
- health damage due to hot or cold surfaces 5.2
4.4 Hazards caused by noise 5.3 6.2.2
4.5 Hazards generated by vibration 5.4 6.2.2
4.6 Hazards generated by materials and substances
processed, used or exhausted

- inhalation of harmful dust
5.5.2
- formation of explosive dust
6.2.2
- sparks
6.2.2
- exhaust air
5.5.1
- lubricants
5.5.3 6.2.2
- hydraulic fluid

4.7 Hazards caused by neglecting ergonomic principles in
machine design
5.6.1, 5.6.3, 5.6.4,
- repetitive strain injuries
6.2.2
- unsuitable postures
5.6.1
- inadequate grip design and tool balance
6.2.2
- neglected use of personal protection equipment
4.8 Hazards caused by failure of energy supply
- unexpected return of energy supply after a breakdown 6.2.2
- incorrect hydraulic fluid flow and outlet pressure 6.2.2
4.9 Hazards caused by missing and/or incorrectly
positioned safety related means

- start and stop device
5.7.1
- unintentional start
5.7.2 6.2.2


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SIST EN 792-9:2001+A1:2008
EN 792-9:2001+A1:2008 (E)
5 Safety requirements and measures
5.1 Mechanical safety
5.1.1 Surfaces, edges and corners
Accessible parts of die grinders, except the insert tool, shall not have sharp edges or angles or rough or
abrasive surfaces, see 3.1 of EN 292-2:1991.
5.1.2 Supporting surface and stability
Die grinders shall be so designed that they can be laid aside and remain in stable position on a plane surface.
5.1.3 Run-down time
The run-down time, after the stop command has been given, shall be as short as possible.
5.1.4 High pressure ejection
Hydraulic systems of the die grinder shall be enclosed so as to give protection against high pressure fluid
ejection.
5.1.5 Speed control
The rated speed of the die grinder shall not be exceeded under the conditions marked on the power tool. It
shall be possible to measure rotational speed by a tachometer.
At no load, the speed may exceed the ra
...