This document 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 document deals with all significant hazards, hazardous situations or hazardous events relevant to masonry and stone cutting-off machines for job site (see Annex A), when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer. This document specifies the appropriate technical measures to eliminate or reduce risks arising from the significant hazards during the lifetime of the machinery as described in EN ISO 12100:2010, 5.4. These machines are designed for use with rotating diamond cutting-off wheels with a continuous rim and/or segmented rim. This document 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 document does not cover the operation of transportable masonry and stone cutting-off machines in potential explosive atmospheres. In this document, 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 document applies to machines which are manufactured after the date of approval of the standard by CEN.

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72	undefined
81	1 Scope 2 Normative references
83	3 Terms and definitions
86	4 Safety requirements and/or protective/risk reduction measures 4.1 General 4.2 Mechanical hazard 4.2.1 General
87	4.2.2 Protection against moving parts 4.2.2.1 Transmission parts 4.2.2.2 Connection between the cutting head and the frame 4.2.2.3 Moving parts involved in the working process (protection against contact with the cutting-off wheel and its fixing devices)
89	4.2.3 Minimum strength of the guards 4.2.4 Frame and legs 4.2.4.1 Stability of the machine 4.2.4.2 Connection of legs to frame 4.2.5 Transport and handling 4.2.6 Fixing of the cutting-off wheel 4.2.6.1 Device for mounting the cutting-off wheel 4.2.6.2 Flanges 4.2.7 Combustion engine-starting device
90	4.2.8 Guiding device of the table and for the material 4.2.8.1 Guiding device of the table 4.2.8.2 Guiding device for the material 4.2.9 Control devices 4.2.9.1 General 4.2.9.2 Start and stop control device (rotation of the cutting-off wheel)
91	4.2.10 Failure of the power supply 4.3 Electrical hazards 4.3.1 General 4.3.2 Water pump 4.4 Thermal hazards 4.4.1 General 4.4.2 Test method 4.5 Exhaust fumes (and gas)
92	4.6 Fluid containers 4.7 Protection against water splashes and dust emissions 4.8 Rotational speed 4.9 Noise 4.9.1 Noise reduction at the design stage
93	4.9.2 Noise emission measurement, declaration and verification procedures 4.10 Vibrations 4.11 Maintenance
94	5 Verification of safety requirements and/or protective/risk reduction measures
96	6 Information for use 6.1 General 6.2 Marking, warnings and signs 6.2.1 Marking 6.2.2 Warnings and signs
97	6.3 Accompanying documents 6.3.1 Instruction handbook 6.3.2 Description of the machine
98	6.3.3 Instructions for transport, handling and storage of the machine and its dismountable parts 6.3.4 Instructions for the installation and the use of the machine
100	6.3.5 Maintenance instructions
101	Annex A (informative)List of significant hazards
103	Annex B (normative)Noise test code – accuracy grade 2 B.1 General B.2 Measurement of the A-weighted emission sound pressure level at the workstation of the operator
104	B.3 Determination of the sound power level emitted by the machine B.4 Measurement uncertainties
105	B.5 Operating conditions
106	B.6 Information to be recorded B.7 Information to be reported B.8 Noise emission declaration by the manufacturer
108	Annex C (normative)Dimensions of the flanges for cutting-off diamond wheel C.1 General C.2 Ratios to the diameters of the cutting-off wheel
109	C.3 Minimum diameter S of the flange C.4 Minimum width R of contact surface of the flange with the cutting-off wheel C.5 Depth of the clearance T
110	Annex D (normative)Strength of guards – State of the art concerning the characteristics of guards used with cutting-off wheels D.1 General D.2 Guard specifications for type−1 and −2 machines (see 3.2) D.2.1 Calculation method D.2.1.1 General
112	D.2.1.2 Formula for determining the translation energy of the fragment of a tool
113	D.2.1.3 Formula for determining the minimum thickness tp of the peripheral part (P) of the guard material according to the chosen material D.2.1.4 Formula for determining the minimum thickness tL of the side part (L) of the guard D.2.2 Example of a minimum thickness of guards made with E24 grade-2 steel (alternative to D.2.1)
114	D.2.3 Other methods for determining the minimum thickness of guards
115	Annex E (informative)Safety signs
117	Annex F (normative)Verification of surface temperature F.1 Test equipment F.2 Test method F.3 Test acceptance
118	Annex G (informative)Vibration-test code G.1 General G.2 Terms and definitions G.3 Vibration parameters to be measured and determined G.4 Instrumentation G.4.1 General G.4.2 Accelerometer G.4.3 Fastening of accelerometer
119	G.4.4 Calibration G.5 Operating conditions, testing and declaration of results G.6 Uncertainties
120	G.7 Information
121	Annex ZA (informative)Relationship between this European Standard and the essential requirements of EU Directive 2006/42/EC aimed to be covered

Published By	Publication Date	Number of Pages
BSI	2022	124


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Status	Definitive
Pages	124
Publication Date	2022-04-08
ISBN	978 0 539 20879 5
Standard Number	BS EN 12418:2021 – TC
Title	Tracked Changes. Masonry and stone cutting-off machines for job site. Safety
Descriptors	Grinding wheels, Safety devices, Occupational safety, Machine tools, Masonry work, Instructions for use, Verification, Equipment safety, Single-point cutting tools, Machine tool components, Transportable, Parting tools, Flanges, Machine guards, Acoustic measurement, Stone, Construction equipment, Safety measures, Marking, Cutting tools, Hazards
Publisher	BSI
Committee	B/513/-/6
ICS Codes	91.220 - Construction equipment

BS EN 12418:2021 – TC:2022 Edition

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