prEN 1083-2

SLOVENSKI STANDARD
01-januar-2024
Krtače na električni pogon - 2. del: Varnostne zahteve
Power-driven brushes - Part 2: Safety requirements
Kraftbetriebene Bürstwerkzeuge - Teil 2: Sicherheitstechnische Anforderungen
Brosses entraînées par un moteur - Partie 2: Exigences de sécurité
Ta slovenski standard je istoveten z: prEN 1083-2
ICS:
25.100.70 Brusiva Abrasives
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2023
ICS 25.100.70 Will supersede EN 1083-2:1997
English Version
Power-driven brushes - Part 2: Safety requirements
Brosses entraînées par un moteur - Partie 2: Exigences Kraftbetriebene Bürstwerkzeuge - Teil 2:
de sécurité Sicherheitstechnische Anforderungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 143.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1083-2:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and symbols . 5
3.1 Brushing machines . 5
3.2 Type of application . 6
3.3 Symbols . 7
4 List of significant hazards . 8
5 Safety requirements . 8
5.1 General requirements . 8
5.2 Safety factors . 8
5.3 Requirements for brushing tools for hand-held machines for hand-held brushing . 9
5.3.1 Dimensional limitations . 9
5.3.2 Permissible tolerances for the bore diameter . 10
5.3.3 Tolerances of the shank of brushes . 10
5.3.4 Requirements for the mounting thread. 10
5.4 Marking . 10
6 Verification of the safety requirements . 10
6.1 Verification of the general requirements . 10
6.2 Verification of the safety factor . 10
6.2.1 General. 10
6.2.2 Mounting . 10
6.2.3 Procedure of the tests . 11
6.3 Verification of dimensional requirements . 11
6.4 Verification of marking . 11
7 Information for use . 11
Annex A (normative) Marking . 13
European foreword
This document (prEN 1083-2:2023) has been prepared by Technical Committee CEN/TC 143 “Machine
tools – Safety”, the secretariat of which is held by SNV.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1083-2:1997.
a) Safety requirements updated by taking over principles from the safety standards for abrasives which
are used on similar machines and for similar applications like brushing tools.
Introduction
This document has been prepared to provide one means of conforming with essential safety
requirements, e.g. of the General Product Safety Directive and associated EFTA regulations.
This document is addressed to designers, manufacturers and suppliers of the rotating technical brushes
described in the scope. In addition, it helps designers, manufacturers and suppliers of brushing machines
in the selection of brushes, in order to reduce the risks and achieve conformity of the respective
machinery with the Essential Safety Requirements of the Machinery Directive.
1 Scope
This document specifies requirements and measures for removal or reduction of hazards resulting from
the design and application of power-driven brushes.
NOTE Power-driven brushing tools are e.g. cup brushes, wheel brushes, end brushes, disc brushes, tube
brushes and head brushes.
This document 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.
This document does not apply to cylinder brushes and strip brushes, brushes for car washing, vacuum
cleaners, floor cleaning, drain and street cleaning machines and dental brushes.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1083-1, Power-driven brushes - Part 1: Definitions and nomenclature
ISO 286-2, Geometrical product specifications (GPS) — ISO code system for tolerances on linear sizes —
Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
ISO 3864-2, Graphical symbols — Safety colours and safety signs — Part 2: Design principles for product
safety labels
ISO 7010, Graphical symbols — Safety colours and safety signs — Registered safety signs
3 Terms, definitions and symbols
For the purposes of this document, the terms and definitions given in EN 1083-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1 Brushing machines
3.1.1
stationary machine
machine being fixed in position during operation
Note 1 to entry: Included are fixed swing frame brushing machines and mobile machines clamped firmly in
position during use.
3.1.2
mobile machine
machine not being fixed in position during operation
Note 1 to entry: Mobile machines are manually guided (but not hand-held) by the operator during use.
Note 2 to entry: Mobile machines are e.g. brushing machines which are moved on wheels over the working
surface.
3.1.3
hand-held machine
machine being held in the hand during operation
Note 1 to entry: Hand-held machines are e.g. angle grinder, axial grinder, power drill.
3.2 Type of application
3.2.2
mechanically guided brushing
brushing process with feed movements of the brush and/or workpiece guided by mechanical means
Note 1 to entry: See Table 1.
3.2.3
manually guided brushing
brushing process with feed movements of the brush and/or the workpiece manually guided by the
operator
Note 1 to entry: See Table 1.
3.2.4
hand-held brushing
brushing process with the machine entirely guided by the operator
Note 1 to entry: See Table 1.
Table 1 — Type of application
Type of machine Type of application Brushing tool Workpiece
Fixed Guided mechanically
Mechanically guided
Stationary machines Guided mechanically Fixed
brushing
Guided mechanically Guided mechanically
Guided by hand Fixed
Stationary and mobile Manually guided
machines brushing
Fixed Guided by hand
Guided by hand Fixed
Hand-held machines Hand-held brushing
Guided by hand Guided by hand
3.3 Symbols
The symbols used in this document are listed in Table 2.
Table 2 — Symbols
Symbol Designation Definition Unit
L
Free length of shaft — mm
L
Clamping length of the shaft — mm
Revolutions per minute at which the shaft
n
Deflection speed of the shaft of a rotating brush is folding under 1/min
ab
centrifugal force
Revolutions per minute at which the shaft
Minimum deflection speed of the
n
of a rotating brush shall not fold under 1/min
ab min
shaft
centrifugal force
Revolutions per minute at which a rotating
n
Bursting speed brush breaks or looses parts of the 1/min
br
filament due to centrifugal force
Revolutions per minute at which a rotating
n
Minimum bursting speed brush shall not break or loose parts of the 1/min
br min
filament due to centrifugal force
Maximum permissible speed of Revolutions per minute of a rotating brush
n
1/min
max
rotation at maximum operating speed
Safety factor against deformation
Bursting speed divided by maximum
or bursting of the brush body or
operating speed, all squared:
s
—
br
loosening of filaments due to
s = (n /n )
br br max
centrifugal force
Deflection speed divided by maximum
Safety factor against shank
permissible speed of rotation:
s
—
ab
deflection
s = n /n
ab ab max
Deflection speed divided by maximum
permissible speed of rotation:
f
Burst speed factor —
br
f = n /n
br br min max
4 List of significant hazards
The significant hazards are given in Table 3.
Table 3 — List of significant hazards
Relevant clauses in this
Hazard designation Hazardous situation (Examples)
document
1. Brush 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
Ejection of parts
— improper handling and storage
Clause 7
— improper use (mounting and
brushing operation) Clause 7
2. Loosening of parts of the brush
Clause 7
during use
Hand arm vibration on hand-held

machines caused by:
— improper use
Vibration
Clause 7
— incorrect mounting
Clause 7
Inhalation of dust caused by:
Extraction of dust and sparks
— improper extraction or missing
Clause 7
during brushing
breathing protection
Danger of fire or explosion caused by:
Extraction of sparks during
Clause 7
— unsafe working environment
brushing
5 Safety requirement
...