SIST EN 792-7:2002
(Main)Hand-held non-electric power tools - Safety requirements - Part 7: Grinders
Hand-held non-electric power tools - Safety requirements - Part 7: Grinders
This European Standard applies to hand-held non-electric power tools driven by rotary or linear motors, powered by compressed air or hydraulic fluid and intended to be used by one operator and supported by:
- the operator's hand or hands;
- a harness;
- a suspension, e. g. a balancer.
This European Standard applies to hand-held non-electric power tools intended for grinding and cutting-off, with bonded, coated and super abrasive products for use on all kinds of materials.
This European Standard lists the significant hazards caused by such power tools and specifies safety requirements valid for different aspects of safety during their foreseeable lifetime.
This part of the standard covers power tools used with:
- abrasive products with a peripheral operating speed less than or equal to 80 m/s;
- cutting-off wheels with a peripheral operating speed less than or equal to100 m/s;
- abrasive products with outside nominal diameter less than or equal to 230 mm;
- cutting-off wheels with outside nominal diameter less than or equal to 300 mm;
- wire brushes.
Handgehaltene nicht-elektrisch betriebene Maschinen - Sicherheitsanforderungen - Teil 7: Schleifmaschinen für Schleifkörper
Diese Europäische Norm gilt für handgehaltene nicht-elektrisch betriebene Maschinen, die durch Motore mit drehender oder linearer Bewegung angetrieben werden, wobei die Energie aus Druckluft oder über Hydaulik-flüssigkeit bezogen werden kann. Die Maschinen sind dazu bestimmt, durch eine Person verwendet und
¾ mit einer oder beiden Händen gehalten,
¾ in einer Einspannvorrichtung aufgenommen,
¾ in einer Halterung, z. B. Aufhängevorrichtung, aufgenommen
zu werden.
Diese Europäische Norm gilt für handgehaltene nicht-elektrisch betriebene Maschinen zum Schleifen und Trennen, mit gebundenen, beschichteten und Hochleistungs-Schleifkörpern für alle Materialarten.
Diese Europäische Norm listet die wesentlichen, von diesen Maschinen ausgehenden Gefährdungen auf und beschreibt die besonderen Sicherheitsanforderungen für die verschiedenen Sicherheitsaspekte während ihrer vorhersehbaren Lebensdauer.
Handgehaltene Maschinen, die in diesem Teil der Norm behandelt werden:
¾ Schleifmaschinen für Schleifkörper mit Umfangsgeschwindigkeit von 80 m/s oder weniger;
¾ Trennscheiben mit Umfangsgeschwindigkeit von 100 m/s oder weniger;
¾ Schleifkörper mit äußeren Maßen von 230 mm Durchmesser oder weniger;
¾ Trennscheiben mit äußeren Maßen von 300 mm Durchmesser oder weniger;
¾ Maschinen mit Drahtbürsten.
Diese Europäische Norm gilt nicht für:
¾ Schleifmaschinen für Schleifstifte, siehe EN 792-9
¾ Schleifmaschinen für Schleifblätter und Polierer, siehe EN 792-8
¾ Trennschleifmaschinen für das Bau- oder Rettungswesen, die durch einen Verbrennungsmotor angetrieben werden, siehe EN 1454
Diese Europäische Norm gilt nicht für Schleifmaschinen für Schleifkörper, die durch einen Verbrennungsmotor angetrieben werden.
Typische Schleifprodukte, die zusammen mit handgehaltenen Schleifmaschinen verwendet werden, sind in Anhang C aufgelistet.
Besondere Anforderungen und Änderungen an handgehaltene Maschinen zum Zwecke des Spannens in einer Halterung, werden in diesem Teil nicht beh
Machines portatives a moteur non électrique - Prescriptions de sécurité - Partie 7: Meuleuses
La présente Norme européenne s'applique aux machines portatives non électriques entraînées par des moteurs rotatifs ou linéaires, alimentés par air comprimé, fluide hydraulique et prévues pour être utilisées par un seul opérateur et portée par :
¾ la ou les main(s) de l'opérateur ;
¾ un harnais ;
¾ en suspension, par exemple à l'aide d'un équilibreur.
La présente Norme européenne s'applique aux machines portatives non électriques utilisées pour le meulage et le tronçonnage de toutes sortes de matériaux, à l'aide de produits abrasifs ; elle spécifie les prescriptions de sécurité qui s'y rapportent.
La présente Norme européenne énumère les risques significatifs provoqués par de telles machines portatives et spécifie les prescriptions de sécurité relatives aux différents aspects de sécurité pouvant être rencontrés pendant leur durée de vie prévisible.
La présente partie de norme couvre les types de machines portatives utilisées avec:
¾ des produits abrasifs dont la vitesse périphérique de travail est inférieure ou égale à 80 m/s ;
¾ meules de tronçonnage dont la vitesse périphérique de travail est inférieure ou égale à 100 m/s ;
¾ des produits abrasifs dont le diamètre nominal extérieur inférieur ou égal à 230 mm ;
¾ meules de tronçonnage dont le diamètre nominal extérieur est inférieur ou égal à 300 mm ;
¾ des brosses métallique.
La présente Norme européenne ne s'applique pas aux:
¾ meuleuses d'outillage avec pince de serrage qui font l'objet de l'EN 792-9 ;
¾ polisseuses-lustreuses et ponceuses qui font l'objet de l'EN 792-8 ;
¾ machines de tronçonnage, pour la construction et le sauvetage, mues par un moteur à combustion interne qui font l'objet de l'EN 1454.
Il n'y a pas de meuleuses couvertes par la présente partie de la norme mues par un moteur à combustion interne.
Neelektrična ročna orodja - Varnostne zahteve - 7. del: Brusilniki
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2002
1DGRPHãþD
SIST EN 68:2000
SIST EN 68:2000/A1:2000
1HHOHNWULþQDURþQDRURGMD9DUQRVWQH]DKWHYHGHO %UXVLOQLNL
Hand-held non-electric power tools - Safety requirements - Part 7: Grinders
Handgehaltene nicht-elektrisch betriebene Maschinen - Sicherheitsanforderungen - Teil
7: Schleifmaschinen für Schleifkörper
Machines portatives a moteur non électrique - Prescriptions de sécurité - Partie 7:
Meuleuses
Ta slovenski standard je istoveten z: EN 792-7:2001
ICS:
25.140.10 3QHYPDWLþQDRURGMD Pneumatic tools
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CONTENTS
page
Foreword 3
0 Introduction 4
1 Scope 5
2 Normative references 5
3 Terms and definitions 6
3.1 General terms and definitions 7
3.2 Terms and definitions related to grinders 7
4 List of significant hazards 9
5 Safety requirements and measures 10
5.1 Mechanical safety 10
5.2 Thermal safety 13
5.3 Noise 13
5.4 Vibration 14
5.5 Materials and substances processed, used or exhausted 14
5.6 Ergonomics 14
5.7 Safety related measures and means 15
6 Information for use 16
6.1 Marking, signs and written warnings 16
6.2 Instruction for use 16
7 Verification 20
7.1 Noise 20
7.2 Vibration 20
7.3 Test of deformation of flanges 20
7.4 Test of guards 21
7.5 Unintentional start 23
7.6 Structure of verification of safety requirements 24
Annex A (informative) Examples of grinders covered by this standard 26
Annex B (informative) Symbols for labels and signs 27
Annex C (informative) List of abrasive products for hand-held grinders 28
Annex D (normative) Design, material and thickness of guards 33
Annex E (informative) Example of calculating procedure of clamping force 39
Annex F (informative) Example of flanges 42
Annex ZA (informative) Relationship of this European Standard with EC Directives 48
Bibliography 49
Foreword
This European Standard 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 June 2002, and conflicting national standards
shall be withdrawn at the latest by June 2002.
This European Standards supersedes EN 68:1977.
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 annex ZA, which is an integral part of this
standard.
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 grinders covered by this standard
Annex B (informative) Symbols for labels and signs
Annex C (informative) List of abrasive products for hand-held grinders
Annex D (normative) Design, material and thickness of guards
Annex E (informative) Example of calculating procedure of clamping force
Annex F (informative) Example of flanges
Annex ZA (informative) Relationship of this European Standard with EC 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, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
0 Introduction
This European standard is a type C standard as stated in EN 1070.
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.
1 Scope
This European Standard applies to hand-held non-electric power tools driven by rotary or linear
motors, powered by compressed air or hydraulic fluid and intended to be used by one operator
and supported by:
- the operator's hand or hands;
- a harness;
- a suspension, e. g. a balancer.
This European Standard applies to hand-held non-electric power tools intended for grinding and
cutting-off, with bonded, coated and super abrasive products for use on all kinds of materials.
This European Standard lists the significant hazards caused by such power tools and specifies
safety requirements valid for different aspects of safety during their foreseeable lifetime.
This part of the standard covers power tools used with:
- abrasive products with a peripheral operating speed less than or equal to 80 m/s;
- cutting-off wheels with a peripheral operating speed less than or equal to100 m/s;
- abrasive products with outside nominal diameter less than or equal to 230 mm;
- cutting-off wheels with outside nominal diameter less than or equal to 300 mm;
- wire brushes.
This Part of the standard does not apply to:
- die grinders with collets which are treated in EN 792-9;
- polishers and sanders which are treated in EN 792-8;
- cutting-off machines used for construction, rescue purposes which are driven by an
internal combustion engine which are treated in EN 1454.
There are no grinders covered by this Part of this European Standard driven by internal
combustion engines.
Typical abrasive products used together with hand-held grinders are listed in annex C.
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 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 the publications referred to in this European Standard are valid only when they are
incorporated in this standard 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.
CR 1030-1, Hand-arm vibrations - Guidelines for vibration hazards reduction - Part 1:
Engineering methods by design of machinery.
EN 1127-1, Explosive atmospheres – Explosion prevention and protection – Part 1: Basic
concepts and methodology.
EN 10111, Continuously hot-rolled low carbon sheet and strip for cold bending - Technical
delivery conditions.
EN 10130, Cold rolled low carbon steel flat products for cold forming - Technical delivery
conditions.
EN 12096, Mechanical vibration - Declaration and verification of vibration emission values.
EN 28662-1, Hand-held portable power tools - Measurement of vibration at the handle -Part 1:
General (ISO 8662–1:1998).
EN ISO 4871, Acoustics - Declaration and verification of noise emission values of machinery and
equipment.
EN ISO 8662-4, Hand-held portable power tools - Measurement of vibration at the handle -Part 4:
Grinders.
EN ISO 11688-1, Acoustics - Recommended practice for the design of low-noise machinery and
equipment - Part 1: Planning (ISO/TR 11688-1:1995).
EN ISO 11688-2, Acoustics - Recommended practice for the design of low-noise machinery and
equipment - Part 2: Introduction to the physics of low-noise design (ISO/TR 11688-2:1998).
EN ISO 14163, Acoustics - Guidelines for noise control by silencers (ISO 14163:1998).
prEN ISO 15744, Hand-held non-electric powertools – Noise measurement code – Engineering
method (grade 2) (ISO/DIS 15744:1999).
ISO 525, Bonded abrasive products - General requirements.
3 Terms and definitions
For the purposes of this European 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
3.2 Terms and definitions related to grinders
3.2.1
grinder
power tool driving a rotating spindle on which an abrasive product is mounted
NOTE A grinder equipped with a cutting off wheel is often called a cutting off machine.
3.2.2
machine spindle
shaft of the grinder which supports, locates and drives the abrasive product
3.2.3
rated speed, r/min
maximum rotational speed of the machine spindle, in revolutions per minute under operating
conditions with the abrasive product mounted and at the upper limit of the energy supply, e.g.
pressure or flow, as specified by the manufacturer
3.2.4
maximum operating speed
maximum peripheral speed of an abrasive product, given in m/s, as specified by the
manufacturer of the abrasive product
3.2.5
flange
disc, normally of metal, mounted on the machine spindle to support and clamp the abrasive
product
3.2.6
flange set
means provided to clamp an unthreaded abrasive product, on the rotating machine spindle
3.2.7
backing flange
flange fixed to the machine spindle and having an unrecessed flat surface against which an
abrasive product is screwed, e.g. a cup wheel, a cone or a plug
NOTE The terms backing, back flange or fixed flange are terms also used.
3.2.8
flange contact diameter, d
f
outside diameter of the contact surface of a flange
3.2.9
guard
device which partly encloses the abrasive product
3.2.10
blotter
thin piece of a compressible material placed between the abrasive product and the flange of the
grinder
3.2.11
tightening torque
torque for tightening the clamping device to fasten the abrasive product to the machine spindle
For other terms, see EN 1070 and also ISO 3857-3 and ISO 5391. For examples of grinders see
annex A.
4 List of significant hazards
The following significant hazards can occur in the use of grinders.
Table 1 - List of significant hazards
Significant hazard type Reference to safety requirement
By design or Information for
guarding use
4.1 Mechanical hazards
- cutting 5.1.1, 5.1.3
- drawing in or trapping (caused by hair, clothing etc. 5.1.6 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 due to:
. cracked abrasive product 5.1.6 6.2.2
. incorrect mounting of the abrasive product 5.1.7, 5.1.8
. misuse of grinder 6.2.2
. overspeed of grinder 5.1.5
. use of incorr
...
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