FprEN 12348

SLOVENSKI STANDARD
01-februar-2024
Nadomešča:
SIST EN 12348:2000+A1:2009
Stabilni vrtalni stroji (na stojalu) - Varnost
Core drilling machines on stand - Safety
Kernbohrmaschinen auf Ständer - Sicherheit
Foreuses à béton (carotteuses) sur colonne - Sécurité
Ta slovenski standard je istoveten z: prEN 12348
ICS:
25.080.40 Vrtalniki Drilling machines
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 12348
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2023
ICS Will supersede EN 12348:2000+A1:2009
English Version
Core drilling machines on stand - Safety
Foreuses à béton (carotteuses) sur colonne - Sécurité Kernbohrmaschinen auf Ständer - Sicherheit
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 151.
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 12348:2023 E
worldwide for CEN national Members.

prEN 12348:2023 (E)
Contents Page
European Foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Safety requirements and/or measures . 9
4.1 General . 9
4.2 Mechanical hazards . 9
4.2.1 General . 9
4.2.2 Protection against moving parts . 10
4.2.3 Safety distance for manually fed machines . 10
4.2.4 Stability . 10
4.2.5 Control device . 11
4.2.6 Failure of the power supply . 12
4.2.7 Dissipation of residual energy . 12
4.3 Electrical hazards . 12
4.3.1 General . 12
4.3.2 Water pump . 13
4.4 Ergonomics . 13
4.5 Thermal hazards . 13
4.5.1 General . 13
4.5.2 Test method . 13
4.6 Exhaust fumes (internal combustion engine machines) and exhaust air (pneumatic
machines) . 13
4.7 Hydraulic and pneumatic installations . 13
4.7.1 Hydraulic installations . 13
4.7.2 Pneumatic installations . 14
4.7.3 Hoses and pipes under pressure . 14
4.8 Fluid containers . 14
4.9 Water supply and dust emissions . 14
4.10 Rotational speed . 14
4.11 Noise . 15
4.11.1 Noise reduction at the design stage . 15
4.11.2 Noise emission measurement, declaration and verification procedures . 15
4.12 Vibration . 15
4.12.1 Vibration reduction at the design stage . 15
4.12.2 Vibration measurement, declaration and verification procedures. 15
4.13 Maintenance . 15
5 Verification of safety requirements and/or protective/risk reduction measures . 16
6 Information for use . 18
6.1 General . 18
6.2 Marking . 18
6.2.1 Regular marking. 18
6.2.2 Warnings . 19
prEN 12348:2023 (E)
6.3 Accompanying documents. 19
6.3.1 Instruction handbook . 19
6.3.2 Description of the machine . 19
6.3.3 Instructions for transport, handling and storage of the device and its modules . 19
6.3.4 Instructions for the installation and the use of the device . 19
6.3.5 Maintenance instructions . 21
Annex A (informative) List of significant hazards . 22
Annex B (informative) Safety signs . 24
Figure B.1 — “Refer to instruction manual/booklet” (see EN ISO 7010:2020, Register No.
EN ISO 7010-M002) . 24
Figure B.2 —“Caution, risk of cutting” . 24
Figure B.3 — “Wear ear protection” (see EN ISO 7010:2020, Register No.
EN ISO 7010-M003) . 24
Figure B.4 — “Wear eye protection” (see EN ISO 7010:2020, Register No.
EN ISO 7010-M004) . 24
Figure B.5 — “General warning sign” (see EN ISO 7010:2020, Register No.
EN ISO 7010-W001) . 25
Figure B.6 — “Wear protective gloves” (see EN ISO 7010:2020, Register No.
EN ISO 7010-M009) . 25
Annex C (normative) Verification of surface temperature . 26
C.1 Test equipment . 26
C.2 Test method . 26
C.3 Test acceptance . 26
Annex D (informative) Vibration test code . 27
D.1 General . 27
D.2 Terms and definitions . 27
D.3 Vibration parameters to be measured and determined. 27
D.4 Instrumentation . 27
D.4.1 General . 27
D.4.2 Accelerometer . 27
D.4.3 Fastening of accelerometer . 27
D.4.4 Calibration . 28
D.5 Operating conditions, testing and declaration of results . 28
D.6 Uncertainties . 28
D.7 Information . 28
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of Directive 2006/42/EC aimed to be covered . 29
Table ZA.1 — Correspondence between this European Standard and Annex I of
Directive 2006/42/EC . 29
Bibliography . 32

prEN 12348:2023 (E)
European Foreword
This document (prEN 12348:2023) has been prepared by Technical Committee CEN/TC 151
“Construction equipment and building material machines - Safety”, the secretariat of which is held by
DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12348:2000+A1:2009.
In comparison with the previous edition, the following technical modifications have been made:
a) normative references revised and updated;
b) delimitation to EN IEC 62841-3-6:2014 implemented;
c) terms and definitions revised and updated;
d) safety requirements revised and updated;
e) requirements for warnings;
f) requirements for Information for use;
g) requirements for operator's instructions;
h) figures and safety signs updated;
i) list of significant hazards revised and updated.
This document 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 Directives, see informative Annex ZA, which is an integral part of this document.
prEN 12348:2023 (E)
Introduction
This document is a type-C standard as stated in EN ISO 12100:2010.
This document is of relevance, in particular, for the following stakeholder groups representing the market
players with regard to machinery safety:
 machine manufacturers (small, medium and large enterprises);
 health and safety bodies (regulators, accident prevention organizations, market surveillance, etc.).
Others can be affected by the level of machinery safety achieved with the means of the document by the
above-mentioned stakeholder groups:
 machine users/employers (small, medium and large enterprises);
 machine users/employees (e. g. trade unions, organizations for people with special needs);
 service providers, e. g. for maintenance (small, medium and large enterprises);
 consumers (in the case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate at the drafting
process of this document.
The machinery concerned and the extent to which hazards, hazardous situations and hazardous events
are covered are indicated in the scope of this document.
When requirements of this type-C standard are different from those which are stated in type-A or type-B
standards, the requirements of this type-C standard take precedence over the requirements of the other
standards for machines that have been designed and built according to the requirements of this type-C
standard.
prEN 12348:2023 (E)
1 Scope
This document applies to core drilling machines on transportable stands equipped with a diamond or
similar superabrasive core drill bit, with or without a water supply connection device, and intended to
drill holes into stone, concrete and similar mineral materials in a stationary position where the power for
the tool rotation is supplied by an electrical, hydraulic, pneumatic or internal combustion prime motor.
The drill unit can be equipped with a soft impact device.
The feed movement of the drill head and core drill bit can be effected by manual, electrical, hydraulic or
pneumatic means.
This document deals with all significant hazards, hazardous situations and hazardous events relevant to
core drilling machines on a stand, when they are used as intended and under conditions of misuse which
are reasonably foreseeable by the manufacturer (see Annex A).
This document specifies the appropriate technical measures to eliminate or reduce risks arising from the
significant hazards associated during the lifetime of the machine, see EN ISO 12100:2010, 5.4.
This document does not apply to:
 percussive or rotary-percussive rock drills either mounted or unmounted;
 hand-held power drills;
 hydraulic or pneumatic power-supply sources;
 mobile undercarriages to which machines can be fitted;
 machinery for drilling and foundation equipment (which is covered by EN 16228-1:2014 to -7:2014);
 machinery with electric main motor ≤ 3,7 kW which is covered by EN 62841-3-6:2014.
In this document, core drilling machines on a stand are called “machines” and diamond core drill bits are
called “tools”.
NOTE The term “diamond” is used as a generic word which covers all varieties of superabrasive products such
as diamond, boron nitride or similar.
This document does not apply to core drilling machines on stand manufactured before the date of its
publication.
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 60204-1:2018, Safety of machinery — Electrical equipment of machines — Part 1: General
requirements
EN 60335-1:2012, Household and similar electrical appliances — Safety — Part 1: General requirements
(IEC 60335-1:2001, modified)
EN 60335-2-41:2012, Household and similar electrical appliances — Safety — Part 1: General
requirements (IEC 60335-1:2001, modified)
EN 60529:1991, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989)
prEN 12348:2023 (E)
EN 62841-1:2015+AC:2015, Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery — Safety — Part 1: General requirements (IEC 62841-1:2014, modified + Cor. 1:2014 +
Cor. 2:2015)
EN 62841-3-6:2014, Electric motor-operated hand-held tools, transportable tools and lawn and garden
machinery — Safety — Part 3-6: Particular requirements for transportable diamond drills with liquid
system (IEC 62841-3-6:2014, modified)
EN IEC 60335-2-41:2021, Household and similar electrical appliances — Safety — Part 2-41: Particular
requirements for pumps (IEC 60335-2-41 2012)
EN ISO 4413:2010, Hydraulic fluid power — General rules and safety requirements for systems and their
components (ISO 4413:2010)
EN ISO 4414:2010, Pneumatic fluid power — General rules and safety requirements for systems and their
components (ISO 4414:2010)
EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk
reduction (ISO 12100:2010)
EN ISO 13732-1:2008, Ergonomics of the thermal environment — Methods for the assessment of human
responses to contact with surfaces — Part 1: Hot surfaces (ISO 13732-1:2006)
prEN ISO 13849-1:2021, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design (ISO/DIS 13849-1:2021)
EN ISO 13850:2015, Safety of machinery — Emergency stop function — Principles for design
(ISO 13850:2015)
EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by
upper and lower limbs
EN ISO 14120:2015, Safety of machinery — Guards — General requirements for the design and
construction of fixed and movable guards (ISO 14120:2015)
EN ISO 18752:2022, Rubber hoses and hose assemblies — Wire- or textile-reinforced single-pressure types
for hydraulic applications — Specification (ISO 18752:2022)
ISO 5348:2021, Mechanical vibration and shock — Mechanical mounting of accelerometers
ISO 16063-1:1998, Methods for the calibration of vibration and shock transducers — Part 1: Basic concepts
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 12100:2010 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
 IEC Electropedia: available at http://www.electropedia.org/
 ISO Online browsing platform: available at http://www.iso.org/obp
prEN 12348:2023 (E)
3.1
core drilling device
device with a manual or powered feed used to drill holes with a diamond core bit into walls, floors and
ceilings consisting of a core drill unit mounted on a transportable stand having a drive spindle equipped
with a core drill bit
Note 1 to entry: The components of a core drilling device are shown in Figure 1.

Key
1 drill stand including a column which can be tiltable and a base
2 core drill unit
3 core drill bit including any connecting accessories (not being part of the machine)
4 feed mechanism to move the drill unit up and down
5 water supply or dust suction system
6 residual current device (RCD) if any
7 water or dust collection device
Figure 1 — Main parts of a core drilling device
prEN 12348:2023 (E)
3.2
core drill unit
drilling unit consists of all the components required for drilling
EXAMPLE The following list gives typical examples:
 drill head with spindle driving device. This driving device can be: internal combustion, electric, pneumatic or
hydraulic;
 drive spindle with fixture for core drill bit;
 water supply and/or dust extraction system;
 on/off control for rotation;
 on/off control for feed;
 on/off control for water supply.
3.3
drill stand
consists of a base with means for fixing it in position, a column which can be tiltable with means for
guiding the drilling unit and optional wheels for transport
Note 1 to entry: The fixing of the base can be an anchor, a clamp or similar.
3.4
core drill bit
rotating abrasive tool(s) which perform(s) the drilling operation
Note 1 to entry: The tool is a rotating (segmented or continuous rim) diamond or similar superabrasive drill that
removes a cylindrical core from the drill hole.
3.5
rated spindle speed
speed of the drive spindle, in revolutions per minute, at rated conditions specified by the machine
manufacturer without tool and under no-load
3.6
nominal mass
mass of the device or its components in kg equipped with all its dismountable parts, but without the tool
mounted and the attached tank(s) being empty
4 Safety requirements and/or measures
4.1 General
Machinery shall comply with the safety requirements and/or protective/risk reduction measures of this
clause. In addition, the machine shall be designed according to the principles of EN ISO 12100:2010 for
relevant but not significant hazards which are not dealt with by this document.
Covering each significant hazard is sufficient for covering combinations of hazards.
4.2 Mechanical hazards
4.2.1 General
Components and parts which shall be manually handled, all the accessible parts, with the exception of the
drill bit, shall be free of sharp edges and burrs which could generate hazards when setting, using,
handling, and maintaining the machine. Burrs resulting from, for example, manufacturing, casting or
welding shall be eliminated and sharp edges shall be smoothed.
prEN 12348:2023 (E)
4.2.2 Protection against moving parts
4.2.2.1 Transmission parts
Rotating transmission parts, for example, couplings and drive shafts, with the exception of the drive
spindle end, shall be provided with fixed enclosing guards to prevent contact. These guards shall comply
with EN ISO 14120:2015 and EN ISO 13857:2019, Table 4. Fixed enclosing guards shall be held in
position either by welding or by mounting them in such a way that they can be opened or removed only
with the aid of tools or keys.
Fixed guards shall have their fixing system permanently attached to the guard and/or the machine when
the guard is removed.
4.2.2.2 Feed of the drilling unit on the column
The drilling unit shall be lockable at least in one position or shall be designed to be self-sustaining in any
stop- position on the column.
Devices equipped with a powered feed system shall be self-sustaining in any stop-position.
Devices shall be designed in such a way that separation of the drill unit from the column needs an
intentional action.
End stops corresponding to the two ends of the working stroke shall be fitted.
Components such as rope(s), chain(s) and belt(s), which may be integral part(s) of the feed system of a
device and are directly involved in the pull-down and pull-up operation of the drill unit, shall fulfil the
following requirements:
 they shall be selected with a safety factor of 3,5, (minimum breaking force in relation to maximum
load) in normal operation as intended by the manufacturer;
 an adequate and safe means of tensioning shall be provided.
4.2.2.3 Fixing of drill bit to the drive spindle
The drive spindle end shall be designed in such a way that the core drill bit and the connecting accessories
prevent self-loosening during normal drilling operation.
4.2.3 Safety distance for manually fed machines
The shortest distance between a manual feed control device and the core-drill bit intended by the
machine manufacturer shall be ≥ 2,5 cm.
4.2.4 Stability
4.2.4.1 Stability during work with anchor fixing
The drill stand shall be equipped with fixing devices which will allow rigid and safe mounting to the
material to be drilled. For anchor fixing, slotted hole(s) shall be provided.
Nuts and screws intended to adjust the stand in position shall need intentional action to loosen them.
4.2.4.2 Stability during work with vacuum device
Vacuum devices for fixing the drill stand shall be provided with a means that informs the user of the actual
vacuum.
Compliance is checked by inspection.
Vacuum devices for fixing the drill stand shall be able to withstand the forces during the drilling process
including the situation of a jammed drill bit.
prEN 12348:2023 (E)
4.2.4.3 Test method for vacuum devices
Compliance is checked by the following test which simulates the bit becoming jammed in the work piece.
The core drilling device shall be fixed with the vacuum device to a 12 mm steel plate. The vacuum shall
be adjusted to the minimum level specified in accordance with 6.2.1.3. The output spindle of the drill unit
is coupled to a stalling device. If the tool is equipped with a gear selection, the gear resulting in the highest
torque shall be chosen. If the tool is equipped with an adjustable clutch, this shall be adjusted to the
highest torque setting. The tool shall come to full speed and then stopped by the stalling device within
45° to 90° of spindle rotation. The stall is maintained for 3 s. Following this test, the tool is maintained in
the stalled position and the power switch is then operated on and off 3 times.
During the test, the operator(s) shall be outside the radius of the tool in case the vacuum system comes
loose.
During the test, the drill stand shall not come loose and shall not rotate by more than 10°.
NOTE Due to the various existing fixing systems for different machine applications it is not possible to give
precise technical requirements for these systems in this document.
4.2.4.4 Stability during transportation, assembly and dismantling
As the stability of the drill stand is not given for these situations, the operator’s manual shall give
instructions for safe handling.
4.2.5 Control device
4.2.5.1 General
For control functions in electric, hydraulic and pneumatic systems, the requirements specified in
EN 60204-1:2018, Clause 9, EN ISO 4413:2010, EN ISO 4414:2010 shall be applied.
Control devices shall be marked without ambiguity. They shall be positioned for safe, quick and
comfortable operation.
NOTE For guidance, see EN ISO 12100:2010, 6.2.8.
For safety-critical functions (SCF), performance level (PL) values shall be determined using the methods
of prEN ISO 13849-1:2021 (see Table 1).
Table 1 — Required performance levels
Type and purpose of SCF Minimum performance level (PL)
Power switch – prevent unwanted switch-on a
Power switch – provide desired switch-off b
Provide desired direction of rotation is not a SCF
Overspeed prevention to prevent output speed
a
above 130 % of rated (no-load) speed
Prevent self-resetting (of the power-unit if
a
hydraulic or pneumatic) as required in 4.2.5.4

4.2.5.2 Start and stop control device for the drive of the spindle and the powered feed
Machines shall be equipped with control devices to start and stop the drive of the spindle and to start and
stop the powered feed.
Starting shall only be possible by an intentional actuation.
prEN 12348:2023 (E)
The stop control devices shall cut the relevant power supply.
4.2.5.3 Emergency stop
Emergency stop device is not required for manually fed devices as it would not reduce the stopping time
the operator being close to the drill unit.
All devices with automatic feed shall be fitted with an easily accessible emergency stop in the system.
This emergency stop shall be in accordance with EN ISO 13850:2015, 4.1.3, stop category 0It shall stop
all dangerous movements as quickly as possible without creating an additional hazard.
NOTE For drill units with integrated feed control, an emergency stop is not required.
4.2.5.4 Protective devices
Electric and/or electronic protective devices (e.g. overload or overtemperature protective devices) or
circuits that shut down the power tool shall not be self-resetting designs if there is a risk associated with
unintentional start-up.
Electronic speed and load controllers are not considered to be a protective device if they do not switch
off the power tool but reduce the speed of the power tool when loaded and increase the speed of the
power tool when unloaded. A residual current device (RCD) is not considered a protective device.
Resetting a protective device by switching the power tool off and on with the circuit breaker is considered
as a non-automatic resetting action.
4.2.6 Failure of the power supply
An interruption of the mains power supply and a reestablishment after an interruption shall not lead to
a dangerous situation in particular:
 the drill unit and feed unit shall not be restarted automatically; an intentional action shall be
necessary;
 the drill unit and feed unit shall not be prevented from stopping if the stop command has been given;
 neither movement nor dangerous actions shall occur.
Such failures shall not obstruct any stop controls from functioning.
4.2.7 Dissipation of residual energy
On pneumatically powered machines, a main line valve shall be provided which either connects the
machines to the air supply or in the closed position shuts off the air supply and releases the air pressure
in the drilling unit when stopping the machine.
4.3 Electrical hazards
4.3.1 General
Machines with an electric motor the power of which is less than or equal to 3,7 kW shall fulfil the electrical
safety requirements of EN 62841-1:2015+AC:2015 and EN 62841-3-6:2014.
Machines with an electric motor the power of which is more than 3,7 kW shall fulfil the electrical safety
requirements of EN 60204-1:2018, in particular Clauses 4, 5, 6, 14, 15 and 16. In addition to
EN 60204-1:2018, 4.4.3, these machines shall work as intended in an ambient temperature range of 0 °C
to 40 °C.
NOTE The mains disconnection device can be implemented by means of a CEE plug/socket combination.
For machines with three phase electrical supply, a device enabling phase inversion (to ensure correct tool
rotation) shall be provided.
prEN 12348:2023 (E)
The enclosure of the electrical controls shall provide a degree of protection of at least IP 54 according to
EN 60529:1991.
4.3.2 Water pump
Where water is supplied by an electrical pump for flushing the drilling tool operating above Safety Extra
Low Voltage (above 50 V) the pump shall fulfil the relevant requirements of EN 60335-1:2012 and
EN IEC 60335-2-41:2021.
4.4 Ergonomics
Components of the core drilling device having a mass greater than 25 kg or core drilling devices that
cannot be separated into modules less than 25 kg shall have hoisting points for lifting devices that allow
their transport and handling during the installation. These points shall be indicated in the operator’s
manual.
4.5 Thermal hazards
4.5.1 General
Handles and other surfaces which require continuous contact shall have a surface temperature not
exceeding 43 °C.
Controls and other parts of the machine which are contacted occasionally shall meet the limits as given
in EN ISO 13732-1:2008, 4.2, according to the chosen material for a contact period up to 5 s, lowest curve.
Hot areas which can be contacted unintentionally shall meet the levels of EN ISO 13732-1:2008 for a
contact period below 1 s. These areas shall be either located at a distance greater than 120 mm from the
gripping areas, or they shall be protected by shields.
These shields shall be designed to reduce the heat transfer from the surface to the body of the operator.
This can be achieved by a structured surface, ribs or special coating.
4.5.2 Test method
The test method to verify the surface temperature of the machine is described in Annex C.
The machine parts whose temperatures exceed the permissible limits of EN ISO 13732-1:2008 for a
contact period not exceeding 1 s and whose surface is greater than 10 cm², shall not be accessible to the
test cone according to Annex C.
4.6 Exhaust fumes (internal combustion engine machines) and exhaust air (pneumatic
machines)
The engine’s exhaust and pneumatic motor exhaust(s) shall not be directed towards the operator when
in the operating position as specified by the manufacturer.
This requirement is considered fulfilled when the angle made by the axis of the outlet of the exhaust
device and the longitudinal axis of the machine, measured from the position of the operator, is equal to
or greater than 90°.
4.7 Hydraulic and pneumatic installations
4.7.1 Hydraulic installations
The hydraulic installations shall comply with the requirements of EN ISO 12100:2010, 6.2.10, and
EN ISO 4413:2010.
prEN 12348:2023 (E)
4.7.2 Pneumatic installations
Pneumatic installations shall comply with the requirements of EN ISO 12100:2010, 6.2.10, and
EN ISO 4414:2010.
4.7.3 Hoses and pipes under pressure
Hoses and pipes under hydraulic and pneumatic pressure respectively shall conform to the requirements
of EN ISO 4413:2010 and EN ISO 4414:2010 respectively.
Core drilling devices with hoses and pipes under pressure shall be so designed that all components
withstand the effect of hot surfaces, inlet pressure and stored energy.
Pipes, hoses and fittings shall be able to withstand the stresses from the pressure. The hoses shall be
marked with the rated working pressure.
Flexible hydraulic hoses intended for pressures higher than 15 MPa (150 bar) shall not be installed by
means of reusable fittings. Fittings which require dedicated tooling (such as a press) and parts authorized
by the manufacturer are not considered as reusable fittings. Hydraulic hoses shall comply with the
requirements of EN ISO 18752:2022.
Hydraulic hoses and pipes shall be separated from electric power wiring and be guarded against hot
surfaces and sharp edges.
Pipes and hoses which shall be disconnected shall be fitted with self-sealing couplings. These couplings
shall be designed or marked to avoid incorrect connection.
4.8 Fluid containers
When filled according to manufacturer’s instructions, fluid containers, such as batteries, fuel and oil
tanks, except water tanks, shall be designed to prevent spillage at every position of the drilling unit.
Seeping at vent systems shall not be considered as spillage.
The tanks for hydraulic fluid shall be fitted with level indicators.
4.9 Water supply and dust emissions
Core drilling devices intended for wet drilling shall be equipped with a water supply device. The volume
of water supplied to the core drill bit shall be sufficient to provide adequate bit flush and dust
suppression.
Core drilling devices intended for dry drilling shall include a dust-collector port located at the appropriate
place and of suitable shape and size. This device when connected to a dust collector according to 6.3.4
shall be capable of controlling the dust.
Dust-collecting and suppression systems for core drilling devices intended for dry cutting may be an
accessory. Local health and safety regulations regarding dust prevention shall be followed.
4.10 Rotational speed
Under the rated conditions of power supply specified by the machine manufacturer, the maximum
rotational speed of the spindle in revolutions per minute shall not exceed the speed as stated on the
machine according to 6.2.
The rotational speed of the spindle not being equipped with a core drill bit shall be measured under the
conditions specified by the manufacturer.
In the case of variation of the power supply specified by the machine manufacturer, the rotational speed
shall not be exceeded by more than 10 % of the rotational speed stated on the machine.
prEN 12348:2023 (E)
4.11 Noise
4.11.1 Noise reduction at the design stage
EN ISO 11688-1:2009 gives general technical information and guidance for the design of low-noise
machines. Special care shall be taken in the acoustical design of cutting-off machines.
This list of technical measures of noise reduction at source gives only examples and is not meant to be
complete:
 choice of low-noise machine components;
 mufflers;
 encapsulation of parts of the machine.
Main noise sources are:
 engine;
 exhaust system;
 transmission;
 hydraulic system;
 core drill bit;
 material to be cut.
NOTE EN ISO 11688-2:2000 gives useful information on noise generation mechanisms in machinery.
4.11.2 Noise emission measurement, declaration and verification procedures
Measurement, declaration and verification of noise emission values shall be made according to
EN 62841-3-6:2014, Annex I.
4.12 Vibration
4.12.1 Vibration reduction at the design stage
Whole-body vibration is not relevant for this type of machinery.
The hand-arm vibration shall be reduced to the lowest level taking into account the technical progress.
4.12.2 Vibration measurement, declaration and verification procedures
Measurement, declaration and verification of hand-arm vibration values shall be made according to
EN 62841-3-6:2014, Annex I.
4.13 Maintenance
The parts of the device which require regular maintenance shall be designed and placed so as to be easily
accessible.
In particular for devices with internal combustion engine:
 the oil drain shall be designed to allow easy recovery of the used oil;
 the sump drain plug shall be recognisable.
prEN 12348:2023 (E)
5 Verification of safety requirements and/or protective/risk reduction
measures
Safety requirements and/or protective/risk reduction measures of Clause 4 of this document shall be
verified according to Table 2.
a) Calculation: the results of which being to establish that the requirements of this document have been
met;
b) visual verification: the result of which only being to establish that something is present (e.g. a guard,
a marking, a document);
c) measurement: the result of which:
1) shows that the required numerical values have been met (e.g. geometric dimensions, safety
distances, resistance of insulation of the electric circuits);
2) provides values for noise emission and vibration declaration purposes;
d) functional tests: the result of which shows that the adequate signals intended to be forwarded to the
main control system of the complete device are available and comply with the requirements and with
the technical documentation;
e) special verification: the procedure being given or in the referred clause.
Table 2 — Means of verification of the safety requirements and/or measures
Clause
Title
number
4 Safety requirements and/or protective measures
4.1. General X
4.2 Mechanical hazards
4.2.1 General X
4.2.2 Protection against moving parts
4.2.2.1 Transmission parts X X X
4.2.2.2 Feed of the drilling unit on the column X X X
4.2.2.3 Fixing of drill bit to the drive spindle X X
4.2.3 Safety distance for manually fed machines  X
4.2.4 Stability
4.2.4.1 Stability during work with anchor fixing X X
4.2.4.2 Stability during work with vacuum device X X
4.2.4.3 Test method for vacuum devices   X
a) Calculation
b) Visual verification
c) Measurement
d) Functional test
e) Special verification
oSIST prEN 1234
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