SIST EN 12418:2000+A1:2009
(Main)Masonry and stone cutting-off machines for job site - Safety
Masonry and stone cutting-off machines for job site - Safety
This European Standard applies to transportable masonry and stone cutting-off machines stationary during work, principally used on job site building construction for cutting-off stones, other mineral construction materials and composite materials having at least one supporting surface. The power for the tool rotation is supplied by electrical or internal combustion prime motor. This European Standard deals with all significant hazards pertinent to masonry and stone cutting-off machines for job site (see clause 4), when they are used as intended and under the conditions foreseen by the manufacturer. This European Standard specifies the appropriate technical measures to eliminate or reduce risks arising from the significant hazards.
These machines are designed for use with rotating diamond cutting-off wheels with a continuous rim and/or segmented rim.
This European Standard does not apply to:
- metal cutting-off machines;
- wood and timber sawing machines;
- machines with a feed or descent mechanism other than manual, or with a pedal;
- mobile machines on a trolley travelling on the ground;
- hand-held portable grinding and cutting-off machines;
- hand-held portable grinding and cutting-off machines mounted on a support to be used in a fixed position.
This European Standard does not cover the operation of transportable masonry and stone cutting-off machines in potential explosive atmospheres.
This European Standard covers electrical hazards making reference to relevant European Standards (see 5.2).
Those hazards that are relevant for all mechanical, electrical, hydraulic, pneumatic and other equipment of machinery and that are dealt with in standards for common use are not covered by this European Standard. Reference to pertinent standards of this kind is made where such standards are applicable and so far necessary.
In this standard, the masonry and stone cutting-off machines for job site construction are called: "cutting-off machines" or "machines", and
Steintrennmaschinen für den Baustelleneinsatz - Sicherheit
Diese Europäische Norm gilt für transportable Steintrennmaschinen, die während des Einsatzes stationär sind, und die hauptsächlich auf Baustellen zum Trennen von Steinen und anderen mineralischen Bau-materialien sowie Verbundwerkstoffen verwendet werden, die mindestens eine Auflagefläche besitzen. Die Antriebsenergie für die Drehbewegung des Werkzeugs wird durch elektrischen oder Verbrennungsmotor zur Verfügung gestellt. Diese Europäische Norm behandelt alle signifikanten Gefährdungen, die auf Steintrenn-maschinen für den Baustelleneinsatz zutreffen, wenn sie bestimmungsgemäß und entsprechend den Empfehlungen des Herstellers verwendet werden (siehe Abschnitt 4). Diese Norm spezifiziert die entsprechenden Maßnahmen zur Beseitigung oder Verminderung der Risiken, die von den signifikanten Gefährdungen ausgehen.
Diese Maschinen sind zum Einsatz mit rotierenden segmentierten Diamanttrennscheiben und Diamant-trennscheiben mit geschlossenem Rand vorgesehen.
Diese Europäische Norm gilt nicht für:
- Metalltrennmaschinen;
- Holztrennmaschinen;
- Maschinen, deren Vorschub oder Absenkmechanismus anders als manuell oder über ein Pedal gesteuert wird;
- mobile Maschinen auf einem Fahrwerk, das auf dem Boden fährt;
- handgeführte, tragbare Schleif und Trennmaschinen;
- auf einer Tragvorrichtung montierte handgeführte, tragbare Schleif und Trennmaschinen zur Anwendung in einer festen Position.
Diese Europäische Norm behandelt nicht den Einsatz von transportablen Steintrennmaschinen in explosions-gefährdeten Bereichen.
Diese Europäische Norm behandelt elektrische Gefährdungen durch Verweis auf relevante Europäische Normen (siehe 5.2).
Die Gefährdungen, die für alle mechanischen, elektrischen, hydraulischen, pneumatischen Einrichtungen von Maschinen relevant sind und in entsprechenden allgemeinen Normen behandelt werden, umfasst diese Europäische Norm nicht. Soweit erforderlich, wird auf anwendbare Normen dieser Art verwiesen.
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Scies de chantier à tronçonner les matériaux - Sécurité
Rezalniki kamenja na gradbiščih - Varnost
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steintrennmaschinen für den Baustelleneinsatz - SicherheitScies de chantier à tronçonner les matériaux - SécuritéMasonry and stone cutting-off machines for job site - Safety91.220Gradbena opremaConstruction equipmentICS:Ta slovenski standard je istoveten z:EN 12418:2000+A1:2009SIST EN 12418:2000+A1:2009en01-maj-2009SIST EN 12418:2000+A1:2009SLOVENSKI
STANDARD
SIST EN 12418:2000+A1:2009
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12418:2000+A1
March 2009 ICS 91.220 Supersedes EN 12418:2000English Version
Masonry and stone cutting-off machines for job site - Safety
Scies de chantier à tronçonner les matériaux - Sécurité
Steintrennmaschinen für den Baustelleneinsatz - SicherheitThis European Standard was approved by CEN on 3 May 2000 and includes Amendment 1 approved by CEN on 15 February 2009.
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:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12418:2000+A1:2009: ESIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 2 Contents Page Foreword .3Introduction .41Scope .42Normative references .53Terms and definitions .64List of significant hazards .95Safety requirements and/or measures . 115.1Mechanical hazard . 115.2Electrical hazards . 155.3Thermal hazards . 155.4Exhaust fumes (and gas) . 165.5Fluid containers . 165.6Protection against water splashes. 165.7Rotational speed . 165.8Noise . 175.9Maintenance . 176Verification of safety requirements and/or measures . 177Information for use . 177.1Marking . 177.2Accompanying documents . 18Annex A (normative)
Noise test code - Grade 2 of accuracy. 22Annex B (normative)
Dimensions of the flanges for cutting-off diamond wheel . 25Annex C (normative)
Strength of guards - State of the art concerning the characteristics of guards used with cutting-off wheels . 27Annex D (normative)
Pictograms . 31Annex E (normative)
Verification of surface temperature . 33Annex F (normative)
!Vibration test code" . 34Annex ZA (informative)
!Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC, amended by 98/79/EC" . 38Annex ZB (informative)
!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC" . 39Bibliography . 40 SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 3 Foreword This document (EN 12418:2000+A1:2009) 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 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 September 2009, and conflicting national standards shall be withdrawn at the latest by December 2009. This document includes Amendment 1, approved by CEN on 2009-02-15. This document supersedes EN 12418:2000. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ". 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." The annex A is normative and contains "Noise test code - Grade 2 of accuracy", annex B is normative and contains "Dimensions of the flanges for cutting-off diamond wheel", annex C is normative and contains "Strength of cutting-off wheel guards ", the annex D is normative and contains "Pictograms“, the annex E is normative and contains "Verification of surface temperature” !, the Annex F is normative and contains "Vibration text code"" and the annex ZA is informative and contains "Relationship of this European Standard with EU Directives“; this European Standard also contains a Bibliography. 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.
SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 4 Introduction This European standard is a Type C-standard as stated in !EN ISO 12100-1:2003". The machinery concerned and the extent to which hazards are covered is indicated in the scope of this standard. 1 Scope This European Standard applies to transportable masonry and stone cutting-off machines stationary during work, principally used on job site building construction for cutting-off stones, other mineral construction materials and composite materials having at least one supporting surface. The power for the tool rotation is supplied by electrical or internal combustion prime motor. This European Standard deals with all significant hazards pertinent to masonry and stone cutting-off machines for job site (see clause 4), when they are used as intended and under the conditions foreseen by the manufacturer. This European Standard specifies the appropriate technical measures to eliminate or reduce risks arising from the significant hazards. These machines are designed for use with rotating diamond cutting-off wheels with a continuous rim and/or segmented rim. This European Standard does not apply to:
metal cutting-off machines; wood and timber sawing machines; machines with a feed or descent mechanism other than manual, or with a pedal; mobile machines on a trolley travelling on the ground; hand-held portable grinding and cutting-off machines; hand-held portable grinding and cutting-off machines mounted on a support to be used in a fixed position. This European Standard does not cover the operation of transportable masonry and stone cutting-off machines in potential explosive atmospheres. This European Standard covers electrical hazards making reference to relevant European Standards (see 5.2). Those hazards that are relevant for all mechanical, electrical, hydraulic, pneumatic and other equipment of machinery and that are dealt with in standards for common use are not covered by this European Standard. Reference to pertinent standards of this kind is made where such standards are applicable and so far necessary. In this standard, the masonry and stone cutting-off machines for job site construction are called: "cutting-off machines" or "machines", and cutting-off wheels are also called: "tools“. This standard applies primarily to the machines which are manufactured after the date of approval of the standard by CEN. SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 5 2 Normative references !The following referenced documents are indispensable for the application 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." !deleted text" !EN 953", Safety of machinery - General requirements for the design and construction of guards (fixed, movable) !deleted text" !EN 12096:1997, Mechanical vibration — Declaration and verification of vibration emission values" !EN 13218:2002", Machine tools — Safety — Stationary grinding machines !EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC 60204-1:2005, modified)" !EN 60335-1:2002, Household and similar electrical appliances — Safety — Part 1: General requirements (IEC 60033-1:2001, modified)" !EN 60335-2-41:2003, Household and similar electrical appliances — Safety — Part 2-41: Particular requirements for pumps (IEC 60335-2-41:2002)" !EN 61029-1:2000", Safety of transportable motor operated electric tools — Part 1: General requirements (IEC 61029-1:1990, modified) prEN 61029-2-7:1992, Safety of transportable motor operated electric tools — Part 2-7: Particular requirements for diamond saws with water supply !prEN ISO 3744:2006, Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering method in an essentially free field over a reflecting plane (ISO/DIS 3744:2006)" !EN ISO 5349-2:2001, Mechanical vibration — Measurement and evaluation of human exposure to hand-transmitted vibration — Part 2: Practical guidance for measurement at the workplace (ISO 5349-2:2001) EN ISO 8041:2005, Human response to vibration — Measuring instrumentation (ISO 8041:2005)" EN ISO 11201:1995, !Acoustics — Noise emitted by machinery and equipment — Measurement of emission sound pressure levels at a work station and at other specified positions — Engineering method in an essentially free field over a reflecting plane (ISO 11201:1995)" !EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology, methodology (ISO 12100-1:2003) EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical principles (ISO 12100-2:2003) 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) EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and lower limbs (ISO 13857:2008) SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 6 EN ISO 20643:2008, Mechanical vibration — Hand-held and hand-guided machinery — Principles for evaluation of vibration emission (ISO 20643:2005) ISO 5348:1998, Mechanical vibration and shock — Mechanical mounting of accelerometers ISO 7000:2004, Graphical symbols for use on equipment — Index and synopsis 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 Standard the terms and definitions stated in !EN ISO 12100-1:2003" apply. Additional terms and definitions specifically needed for this Standard are added below. 3.1 cutting-off machine transportable machine used in building and site construction, operating at a stationary position and is intended for cutting primarily construction material of different weight, shape and dimensions, for example natural stone, concrete (reinforced or otherwise), bricks, concrete blocks (breeze blocks), paving slabs or cobblestones, roof tiles and ceramic tiles. The feed of the material or of the table where it is placed is made by hand. The cutting head, if movable, is moved manually or by a pedal. The power source of a cutting-off machine is an electrical motor or an internal combustion engine with built-in tank. 3.2 types of cutting-off machines cutting-off machines can be basically classified in four different types defined below: Type 1: Machine with a movable table having a fixed (permanently or by means of clamps) or swinging moveable cutting head (tiltable or not) which is located over the table; Type 2: Machine with a fixed table having a horizontal moving cutting head and, if applicable, vertically adjustable and tiltable cutting head located over the table; Type 3: Machine with a fixed table having a vertically moving cutting head; Type 4: Machine with a fixed or movable and/or inclinable table having a fixed cutting head, and only intended for use with continuous rim tools having a maximum diameter of 250 mm. The motor is located under the table SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 7
Figure 1 — Sketches of the different types of cutting-off machines SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 8 3.3 parts of a cutting-off machine cutting-off machine comprising the following parts: frame; electric motor or an ICE (internal combustion engine) to drive the cutting-off wheel in rotation; cutting head; rotating cutting-off wheel (see clause 1); material-carrying table (movable and/or tiltable or not); cutting-off wheel guard; self containing water tank with an electrical or mechanical water pump or an alternative water supply See also figure 2.
Cutting-off machine with internal combustion engine Cutting-off machine with electric motor 1 frame (incorporating the water tank) 2 legs (demountable or otherwise) 3 cutting head 4 cutting-off wheel
5 electric motor (or engine) 6 handle for moving the cutting head 7 foot pedal for lowering the cutting head (if any) 8 cutting-off wheel guard 9 moveable table including material stop for supporting materials to be cut 10 water splash deflector 11 table guiding tracks 12 water supply system 13 front stop of the table 14 cutting depth stop (for types 1 and 2 machines) Figure 2 — Examples of cutting-off machines SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 9 3.4 cutting head cutting head, also called mobile unit, consisting of: the cutting-off wheel; its fixing means on the spindle; the power unit or if the prime mover is fixed, the power transmission to the cutting-off wheel; the handle; the control panel; the guards which are moveable relative to the frame 3.5 rated spindle speed speed of the drive spindle in revolutions per minute (min-1) at the rated conditions specified by the machine manufacturer but without cutting-off wheel and under no load 3.6 nominal mass mass of the cutting-off machine equipped with all its dismountable parts, but without the cutting-off wheel, the tanks being empty 3.7 maximum operating mass mass of the cutting-off machine equipped with all its dismountable parts, ready for use, with the cutting-off wheel mounted and the tanks being full 4 List of significant hazards This clause contains all significant hazards and hazardous situations, as far as they are dealt with in this European Standard, identified by risk assessment significant for this type of machinery and which require action to eliminate or reduce risk. Table 1 — List of significant hazards
HazardsRelevant subclauses
4.1 Crushing hazard 5.1.1, 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.6, 5.1.7, 5.1.8, 5.1.9, 5.1.10, 7.2.1
4.2 Shearing hazard 5.1.1, 5.1.2, 5.1.3, 5.1.5, 5.1.6, 5.1.8, 5.1.9, 5.1.10
4.3 Cutting and severing hazard 5.1.1, 5.1.2, 5.1.3, 5.1.6, 5.1.8, 5.1.9, 5.1.10
4.4 Entanglement hazard 5.1.1, 5.1.2, 5.1.3, 5.1.6, 5.1.8, 5.1.9, 5.1.10
4.5 Drawing-in or trapping hazard 5.1.1, 5.1.2, 5.1.3, 5.1.6, 5.1.9, 5.1.10
(continued) SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 10 Table 1 - List of significant hazards (continued)
Hazards Relevant subclauses 4.6 Impact hazard 5.1.1, 5.1.2, 5.1.3, 5.1.5, 5.1.6, 5.1.7, 5.1.8, 5.1.9, 5.1.10, 7.2.1
4.7 Fluid ejection hazard 5.6
4.8 Hazards caused by ejection of parts (material/work pieces) 5.1.1, 5.1.2, 5.1.3, 5.1.6, 5.1.7, 5.1.8, 5.1.9, 5.1.10, 5.7, 7.2.1
4.9 Hazards caused by loss of stability (machinery and machine parts) 5.1.4, 5.1.5, 5.1.9, 7.2.1
4.10 Slip, trip and fall hazard in relationship with machinery 5.5, 7.2.1
4.11 Hazards caused by electrical contact direct or indirect 5.2, 7.2.1
4.12 Hazards resulting in burns and/or scalds, by possible contact of persons, by flames or explosions and also by radiation of heat sources 5.3, 7.2.1
4.13 Health-damaging effects by hot or cold work environment and by noise 5.8, 7.2.1
4.14 Hazards resulting from contact with or inhalation of harmful fluids, gases, mists, fumes and dusts 5.4, 5.5, 5.9, 7.2.1
4.15 Hazards caused by fire and/or explosion 7.2.1
4.16 Unhealthy postures or excessive efforts 5.1.5, 5.1.7, 5.1.8, 7.2.1.3
4.17 Hazards caused by inadequate local lighting 7.2.1
4.18 Hazards caused by human errors 5.1.2, 5.2.1, 7.1, 7.2.1
4.19 Hazard combinations 5.1.1, 7.1, 7.2.1
4.20 Hazard caused by failure of energy supply (of energy and/or control circuits) 5.1.10, 5.2, 7.2.1
4.21 Hazards caused by failure/disorder of control system 5.1.9, 5.1.10, 5.2, 7.2.1
4.22 Hazards caused by errors of fitting 7.1, 7.2.1
4.23 Hazards caused by temporarily missing and/or incor-rectly positioned safety related measures/means as:
4.23.1 Guards of all kinds 7.2.1
4.23.2 Safety related protection devices of all kinds 7.2.1
4.23.3 Starting and stopping devices 7.2.1
4.23.4 Information on safety signs and tags 7.1.3
4.23.5 Information and warnings of all kinds 7.1, 7.2.1
4.23.6 Essential equipment and accessories for safe ad-justment and/or maintenance 5.1.8.2, 7.2.1 SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 11
5 Safety requirements and/or measures Machinery shall comply with the safety requirements and/or measures of this clause and in addition with !EN ISO 12100-1:2003" and !EN ISO 12100-2:2003" for hazards which are relevant but not significant and which are not dealt with in this standard. For the application of !EN ISO 13857", EN 953, and EN 60204-1 the manufacturer shall carry out an adequate risk assessment for the requirements thereof where choice is necessary. NOTE This specific risk assessment should be part of the general risk assessment relating to the hazards not covered by this standard. Covering each significant hazard is sufficient for covering combinations of hazards. 5.1 Mechanical hazard 5.1.1 General As components and parts have to be manually handled, all the accessible parts, with the exception of the cutting-off wheel, shall be free of sharp parts 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. 5.1.2 Protection against moving parts 5.1.2.1 Transmission parts Rotating transmission parts, for example, couplings and belt drives for drive shafts and mechanical water pumps shall be provided with fixed guards to prevent contact. These guards shall comply with !EN 953". Fixed 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. !These guards shall comply with EN 953 and 5.3.2.2 of EN ISO 12100-2:2003." !deleted text" 5.1.2.2 Connection between the cutting head and the frame For type 1 machines (see 3.2) with a swinging moveable cutting head, the cutting head, as far as it is not lockable, shall return automatically to rest position when released. In this case the area between the cutting head and the frame of the machine shall be protected to avoid any shearing hazard. This can be done either by design (taking into account the minimum distances given in EN 349:1993) or by enclosing the shearing area with guards. 5.1.2.3 Moving parts involved in the working process (protection against contact with the cutting-off wheel and its fixing devices) The safety measures to be taken shall be adapted according to the type of machines (see 3.2). SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 12 5.1.2.3.1 Types 1, 2 and 3 machines The upper part of the cutting-off wheel and its fixing device shall be covered with a fixed guard to avoid inadvertent contact and to protect against ejection of fragments from the tool and the work piece. For type 3 machines with a vertically moving cutting head, the cutting-off wheel shall be completely covered at the upper position. The guard shall be designed to allow fitting and removal of the cutting-off wheel. The spindle end shall be fully protected. When the tool guard is removable to allow access to the tool fixing device, the machine shall be so designed that the rotation of the tool is not possible without the guard. The following exception is possible. The existence of a device stopping the cutting-off wheel is not necessary, when the absence or the opening of the guard creates a projection of water, which prevents an intended use of the machine. The following requirements for the design of the cutting-off wheel guard shall be considered: a) When swinging both forward and rear edges of the cutting-off wheel guard shall be located below the horizontal plane passing through the centre of the cutting-off wheel when in normal cutting-off position (specified by the manufacturer) shown in figure 3a. When fixed the guard opening angle AOB shall not exceed 180°.
Figure 3a b) The rear edge of the cutting-off wheel guard shall be located, at least, as low as the horizontal plane passing by the lowest point of the flange. The foregoing condition shall be fulfilled when the cutting head is in the highest position. The rear angle of the guard α2 shall not be greater than the maximum upward angle α1 measured when the cutting head is in the highest position (see figure 3b).
Figure 3b Front of the machine Link joint of the cutting head Front of the machine Tangent at the lowest edge of the wheel flange SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 13
5.1.2.3.2 Type 4 machines These machines are intended to be used only with continuous rim diamond cutting-off wheels. For this type of machine, where the cutting-off wheel fixing device is located below the table, the design shall be such that this fixing device is out of reach of the operator during the working procedure. The working area shall be protected by means of a water splash guard which can be fixed to a support fixed to the frame. This guard shall minimize water splash against the operator. 5.1.3 Minimum strength of the guards The guards of the cutting-off wheel (for type 1, 2 and 3 machines) shall be so designed to resist strains resulting from an accidental projection of a fragment of the cutting-off wheel. Brittleness of the guard material shall be taken into account. Permanent plastic deformation of the guard resulting from stresses shall be allowed. Guards shall remain attached to the cutting head in case of the projection of segments of the cutting-off wheel.
Annex C indicates the characteristics of guards which correctly fulfil their function. 5.1.4 Frame and legs 5.1.4.1 Stability of the machine The machine shall be stable in order to avoid overturning when operating or during handling the material to be cut on the table. This may be verified as follows: The machine without water (when the tank is located inside the frame of the machine), the cutting head and the table being secured, shall be inclined at an angle of 10° in all positions with respect to the vertical. It shall not overturn regardless of the position of the movable parts. 5.1.4.2 Connection of legs to frame Connection between legs and frame shall be so designed that any loss of the legs in particular when lifting the machine, is prevented. Disconnection shall only be possible by an intentional manual action. 5.1.5 Transport and handling The movable parts of the machine shall be either lockable or removable to avoid any risk of shearing or crushing e.g. during handling and carrying. NOTE For technical requirements relating to transport and lifting of the machine see !5.5.5" of
!EN ISO 12100-2:2003". SIST EN 12418:2000+A1:2009
EN 12418:2000+A1:2009 (E) 14 5.1.6 Fixing of the cutting-off wheel 5.1.6.1 Device for mounting the cutting-off wheel The device for mounting the cutting-off wheel shall be so designed that loosening and untightening shall be possible only by an intentional manual action (e.g. retaining the cutting-off wheel on the drive spindle by a threaded nut which, by the direction of the thread, prevents unscrewing during the cutting operation). 5.1.6.2 Flanges The flanges intended to mount a diamond cutting-off wheel shall comply with the requirements in annex B. 5.1.7 Starting with a crank Internal combustion engines which are hand-started using a crank shall be designed to avoid hazard caused by kick-back, for example, a safety starting crank shall be provided or the engine shall be fitted with an internal anti-kick-back device. Easily accessible storage facilities shall be provided for safety starting cranks. 5.1.8 Guiding device of the table and for the material 5.1.8.1 Guiding device of the table Cutting-off machines with a movable table, shall be equipped with a guiding device of the table which shall ensure stability of the table during cutting-off and a feed movement parallel to the plane of the cutting-off wheel. These requirements are fulfilled when the movable table has the following characteristics: it shall be designed to prevent it from leaving the track at each end; it shall be designed to prevent it overturning under the weight of the material intended to be cut; it shall be designed to avoid any crushing hazard of the operator's hands between the table and the frame, when the table slides back to its initial position. 5.1.8.2 Guiding device for the material Cutting-off machines with a moveable table shall be equipped with a cutting guide for straight and/or diagonal cutting and with a material stop (see figure 2) to aid the operator when applying the feed motion. For type 1 and 4 machines with mobile tables which do not have a guiding device for the material, the tables shall be covered with an anti slip surface (e.g. coating with elastomer) and with a front stop to resist the horizontal cutting force. For type 4 machine with a fixed table, its top surface shall be smooth and regular. For all types of machines intended for bevelled cut, the material shall be supported and guided by means of an adjusting stop, the table itself or an accessory. 5.1.9 Control devices 5.1.9.1 General For control functions in electric systems, see clauses
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