BRITISH STANDARD BS EN 50144 2 6 2001 Incorporating Amendment No 1 Safety of hand held electric motor operated tools — Part 2 6 Particular requirements for hammers The European Standard EN 50144 2 6 2[.]
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BRITISH STANDARD BS EN 50144-2-6:2001 Incorporating Amendment No Safety of hand-held electric motor operated tools — Part 2-6: Particular requirements for hammers The European Standard EN 50144-2-6:2000, with the incorporation of Amendment A1:2001, has the status of a British Standard ICS 25.140.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 50144-2-6:2001 National foreword This British Standard is the official English language version of EN 50144-2-6:2000 including amendment A1:2001 It supersedes BS EN 50144-2-6:1997 which is withdrawn The UK participation in its preparation was entrusted by Technical Committee CPL/61, Safety of household and similar electrical appliances, to Subcommittee CPL/61/6, Portable motor operated tools, which has the responsibility to: — aid enquirers to understand the text; — present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; — monitor related international and European developments and promulgate them in the UK A list of organizations represented on this subcommittee can be obtained on request to its secretary Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 2001 Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages to 17 and a back cover The BSI copyright date displayed in this document indicates when the document was last issued Sidelining in this document indicates the most recent changes by amendment Amendments issued since publication © BSI 25 April 2002 ISBN 580 37201 Amd No Date Comments 13540 25 April 2002 Indicated by a sideline Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 50144-2-6 NORME EUROPÉENNE December 2000 EUROPÄISCHE NORM + A1 August 2001 ICS 25.140.20; 25.120.10 Supersedes EN 50144-2-6:1996 English version Safety of hand-held electric motor operated tools Part 2-6: Particular requirements for hammers (includes amendment A1:2001) Sécurité des outils électroportatifs moteur Partie 2-6: Règles particulières pour les marteaux Sicherheit handgeführter motorbetriebener Elektrowerkzeuge Teil 2-6: Besondere Anforderungen an Hämmer (inclut l′amendement A1:2001) (enthält Änderung A1:2001) This European Standard was approved by CENELEC on 1998-10-01 Amendment A1 was approved by CENELEC on 2001-05-01 CENELEC 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 Central Secretariat or to any CENELEC 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 CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels © 2000 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 50144-2-6:2000 + A1:2001 E Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page EN 50144-2-6:2000 Foreword This European Standard has been prepared by the Technical Committee CENELEC TC 61F, Hand-held and transportable electric motor operated tools The text of the draft was submitted to the Unique Acceptance Procedure (UAP) in December 1993 and was approved by CENELEC as EN 50144-2-6 on 1994-10-04 A draft for an amendment was submitted to UAP in April 1994 and was approved by CENELEC on 1994-10-04 for inclusion into the European Standard A further amendment was submitted to UAP in May 1996 and was approved by CENELEC as amendment A1 to EN 50144-2-6 on 1996-12-09 Amendments to fulfil the essential requirements of the Machinery Directive were submitted to the formal vote in June 1998 and were approved by CENELEC on 1998-10-01 for inclusion, together with the earlier amendment, into a second edition of EN 50144-2-6 This European Standard supersedes EN 50144-2-6:1996 The following dates were fixed: - - latest date by which the EN has to be implemented at a national level by publication of an identical national standard or by endorsement (dop) 2001-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2001-12-01 This standard is divided into two parts: Part 1: General requirements which are common to most hand-held electric motor operated tools (for the purpose of this standard referred to simply as tools) Part 2: Requirements for particular types of tool which either supplement or modify the requirements given in Part to account for the particular hazards and characteristics of these specific tools This European Standard has been prepared under a mandate given to CEN/CENELEC by the European Commission and the European Free Trade Association and supports the essential health and safety requirements of the Machinery Directive Compliance with the clauses of Part together with this Part provides one means of conforming with the essential health and safety requirements of the Directive For noise and vibration this standard covers the requirements for their measurement, the provision of information arising from these measurements and the provision of information about the personal protective equipment required Specific requirements for the reduction of the risk arising from noise and vibration through the design of the tool are not given as this reflects the current state of the art As with any standard, technical progress will be kept under review so that any developments can be taken into account CEN TC/255 is producing standards for non-electrically powered tools Warning: Other requirements and other EC Directives can be applicable to the products falling within the scope of this standard This standard follows the overall requirements of EN 292-1 and EN 292-2 Subclauses, tables and figures which are additional to those in Part are numbered starting from 101 NOTE: In this European Standard the following print types are used: - Requirements proper; - Test specifications; - Explanatory matter © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page EN 50144-2-6:2000 Foreword to amendment A1 This amendment to the European Standard EN 50144-2-6 was prepared by the Technical Committee CENELEC TC 61F, Hand-held and transportable electric motor-operated tools The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as amendment A1 to EN 50144-2-6:2000 on 2001-05-01 The following dates were fixed: — — latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-08-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2004-08-01 © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page EN 50144-2-6:2000 Contents Page Scope Definitions General requirements General conditions for the tests 5 Rating Classification Marking and information for use Protection against electric shock Starting 10 Input and current 11 Heating 12 Leakage current 13 Environmental requirements 14 Moisture resistance 15 Insulation resistance and electric strength 16 Endurance 17 Abnormal operation 18 Mechanical hazards 19 Mechanical strength 11 20 Construction 11 21 Components 12 22 Internal wiring 12 23 Supply connection and external flexible cables and cords 12 24 Terminals for external conductors 12 25 Provision for earthing 12 26 Screws and connections 12 27 Creepage distances, clearances and distances through insulation 12 28 Resistance to heat, fire and tracking 12 29 Resistance to rusting 12 30 Radiation 12 Annexes 17 © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page EN 50144-2-6:2000 Scope This clause of Part is applicable except as follows: Addition: This European Standard applies to hammers including rotary hammers This standard does not give requirements for the design of the tool for the reduction of the risk arising from noise and vibration Definitions This clause of Part is applicable except as follows: 2.2.18 Replacement: 2.2.18 normal load: load obtained when the hammer, mounted in an apparatus as shown in Figure 101, is operated intermittently, each cycle comprising a period of operation of 30 s and a rest period of 90 s with the hammer switched off, an axial force just sufficient to ensure steady operation of the hammer mechanism being applied to the hammer through a resilient medium General requirements This clause of Part is applicable General conditions for the tests This clause of Part is applicable Rating This clause of Part is applicable Classification This clause of Part is applicable Marking and information for use This clause of Part is applicable except as follows: 7.13.1 Addition: — information on the correct use of dust collection equipment, if fitted; Additional subclause: 7.13.101 The instruction sheet shall also include the following: “Hearing protection should be worn” © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page EN 50144-2-6:2000 Protection against electric shock This clause of Part is applicable Starting This clause of Part is applicable 10 Input and current This clause of Part is applicable 11 Heating This clause of Part is applicable except as follows: 11.2 Addition: If it is not possible to attain rated input when operating the hammer as specified for normal load, the hammer is loaded by means of a brake adjusted so as to attain rated input, the hammer mechanism being not engaged or removed 11.6 Addition: The temperature rise limit specified for the external enclosure does not apply to the hammer mechanism 12 Leakage current This clause of Part is applicable 13 Environmental requirements This clause of Part is applicable except as follows: 13.1.2 Replacement: The tests under working conditions, orientation within the cabin and material to be worked shall be in accordance with the following: Material Concrete block 800 mm ´ 500 mm ´ 200 mm, formulation in accordance with Table 101 Table 101 — Concrete formulation (per cubic metre) Cement Water Aggregate 1844 kg 330 kg 99 kg Particle size Fraction (%) to mm 38 ± to mm 50 ± to 16 mm 80 ± to 32 mm 100 Compressive strength after 28 days to be 40 N/mm © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page EN 50144-2-6:2000 Feed-speed Just sufficient force to ensure steady working Depth of cut 80 % of drill bit length but not more than 190 mm Width of cut-off Not applicable Tool bit/cutter/ abrasive Type as specified by the manufacturer which is as close as possible to Table 102 Table 102 — Drill bit size Tool mass kg £ 3,5 > 3,5 £5 >5 £7 >7 £ 10 > 10 £ 18 > 18 Diameter of drill bit mm 10 16 20 25 32 40 Usable length of drill bit mm 100 200 250 New or sharpened drill to be used at the start of the test period Integral collection (if any) Emptied as required during a pause in the test Orientation Hammers having a tool mass of up to 10 kg: drilling in a horizontal direction across the cabin with the airflow from left to right of the operator (see Figure 102) Holes drilled to be within 90 cm to 120 cm of the floor This is achievable by placing the test block on a bench 80 cm high, the 800 mm side of the test block being horizontal Hammers having a tool mass of over 10 kg: drilling down in a vertical direction, with the airflow from left to right of the operator The upper surface of the test block should be between 200 mm and 400 mm above the floor surface This allows the block to be supported on e.g wood blocks for ease of transportation Test cycle One hole every minutes Test period 60 minutes total 13.2 Addition: Test requirements for hammers without rotary action are not covered by this standard 13.2.2 Replacement of paragraph 2: For hammers with rotary action the speed setting shall be that recommended by the manufacturer for the drill bit size defined for the test for drilling in concrete © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page EN 50144-2-6:2000 13.2.3 Replacement: Rotary hammers are tested under load as shown in Figure 103 and in accordance with the conditions shown in Tables 101, 102 and 103 Care shall be taken that the location of the work piece on its support does not adversely affect the result of the test If necessary, the work piece shall be supported on a resilient material 20 mm thick which compresses to 10 mm under the weight of the work piece The result to be used shall be the arithmetic mean, rounded off to the nearest decibel, of the values obtained from five consecutive tests The tool shall be held by the operator in such as way as to correspond to normal use Table 103 — Test conditions for rotary hammers Orientation Drilling vertically down in into a concrete block having the formulation specified in Table 101 and having the dimensions 500 mm ´ 500 mm and 200 mm in height and supported on resilient material Tool bit Drill bit as recommended by the manufacturer for drilling in concrete and of the size defined in Table 102 Feed force 1,5 times the mass of the tool but not less than 80 N Test cycle Measurement starts when the drill bit has reached a depth equal to its diameter and stops when the depth has reached 80 % of its usable length or 180 mm, whichever is the shorter 13.3.4 Replacement of paragraph 2: For hammers without rotary action all speed setting devices shall be adjusted to the highest value For hammers with rotary action the speed setting shall be that recommended by the manufacturer for the drill bit size defined for the test for drilling in concrete 13.3.7 Replacement of paragraphs and 3: Hammers with rotary action are tested under load as shown in Figure 103 and in accordance with the conditions shown in Tables 101, 102 and 103 Hammers without rotary action are tested under load in the test fixture shown in Figure 104 and defined in Table 104, which is mounted on a concrete block having the formulation and dimensions specified in Tables 101 and 103 The test fixture shown in Figure 104, which is made of steel, consists of a tube filled with hardened steel balls (ball bearings) on which a specially constructed test tool bit impacts The parts of the fixture apart from the test tool shall be rigidly clamped to prevent additional vibration The length of the test tool bit shall correspond to the shortest normal tool recommended by the manufacturer, the test tool bit rebound shall be restrained by means of a spring exerting just sufficient force to prevent “chattering” Table 104 — Test fixture parameters for hammers without rotary action Shank diameter d mm Steel tube diameter D mm Steel ball diameter mm Ball column height H mm £ 23 40 100 > 23 60 150 © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page EN 50144-2-6:2000 When using the test fixture shown in Figure 104, the force to be applied to the tool in addition to its weight shall be sufficient to ensure stable operation In general, this is achieved by a feed force, expressed in N, which is 30 times the mass of the tool in kg but not more than 200 N 14 Moisture resistance This clause of Part is applicable 15 Insulation resistance and electric strength This clause of Part is applicable 16 Endurance This clause of Part is applicable except as follows: 16.2 Replacement: Hammers without rotary action as well as rotary hammers are mounted in the vertical position in an apparatus as shown in Figure 101 They are operated at rated voltage or at the upper limit of the rated voltage range and under normal load for four periods of h each, the interval between these periods being at least 30 Rotary hammers which have a selector switch to select the mode of operation shall be operated with such a switch set to the combined mode position (hammer with rotation) 17 Abnormal operation This clause of Part is applicable 18 Mechanical hazards This clause of Part is applicable except as follows: 18.3 Replacement: Rotary hammers having an input power of 700 W or more shall have at least two handles to control the tool One of the handles may be the body of the tool if suitably shaped Additional subclauses: 18.101 Rotary hammers shall be constructed in such a way that reaction torques, including sudden stalling torque, which can lead to injuries to hands and arms or to accidents resulting from persons falling or dropping tools, are avoided Compliance is checked by the tests described in 18.101.1, 18.101.2 and 18.101.3 18.101.1 The range of operating conditions is such that it is not possible to specify a single test to represent them all However, measurements indicate that a maximum force of 400 N is acceptable at the centre of the hand Using this maximum reaction force, the maximum allowed reaction torque MRmax can be calculated for various tool configurations and lever arm lengths and these are shown at 18.101.2.1 and 18.101.2.2 © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page 10 EN 50144-2-6:2000 18.101.2 The reaction torque MR shall neither as stalling torque nor as clutch torque exceed the maximum reaction torque given in 18.101.2.1 or 18.101.2.2 for the shape of the tool concerned and whether it has single or double-hand support Based on practical experience, it is assumed that with some double-hand support systems the reaction torque MR will be mainly absorbed at the auxiliary handle with the hand at the switch handle chiefly serving to provide operating pressure and guide the tool 18.101.2.1 Single-hand support © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page 11 EN 50144-2-6:2000 18.101.2.2 Double-hand support a1 m 18.101.3 The static stalling torque or slip torque of a clutch is measured with the driving spindle locked and with the tool in a cold condition Mechanical gears are adjusted to the lowest speed Electronic speed regulators are adjusted to their maximum speed value The tool is connected at rated voltage and switched on by means of the tool switch The torque measured shall not exceed the relevant maximum value given by 18.101.2.1 and 18.101.2.2 19 Mechanical strength This clause of Part is applicable except as follows: 19.1 Addition: The test of 19.3 is not made on hammers having a mass exceeding 10 kg 20 Construction This clause of Part is applicable © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page 12 EN 50144-2-6:2000 21 Components This clause of Part is applicable 22 Internal wiring This clause of Part is applicable 23 Supply connection and external flexible cables and cords This clause of Part is applicable except as follows: 23.2 Replacement of paragraph 1: Non-detachable flexible cables or cords shall be not lighter than heavy polychloroprene sheathed flexible cable (code designation H07 RN-F) 24 Terminals for external conductors This clause of Part is applicable except as follows: 24.1 Modification: Terminations for soldered connections are allowed, irrespective of the rated input 25 Provision for earthing This clause of Part is applicable 26 Screws and connections This clause of Part is applicable 27 Creepage distances, clearances and distances through insulation This clause of Part is applicable 28 Resistance to heat, fire and tracking This clause of Part is applicable 29 Resistance to rusting This clause of Part is applicable 30 Radiation This clause of Part is applicable © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page 13 EN 50144-2-6:2000 Key Synthetic rubber disk or material having similar properties with a shore hardness of 70 ° to 80 °, a thickness of 10 mm and a diameter of 75 mm Polyamide-lined yoke, adapted to suit the grip of the tool Sample Mechanical or pneumatic springs applying a force to the sample Punch Hardened steel ball with a diameter of 38 mm Hardened steel transfer plate of mass M2 and diameter D, grooved on underside as shown in detail Synthetic rubber disk or material having similar properties with a shore hardness of 70 ° to 80 °, a thickness of mm to mm and fitting closely in the cavity Steel base of mass M1 with a circular cavity having a diameter mm greater than that of the transfer plate Bottom of cavity grooved as shown in detail 10 Concrete block supported by compacted ballast of earth 11 Steel peg to prevent any horizontal movement 12 Burnished surface and edges When submitting a tool, the applicant may supply a suitable punch and shank if this is necessary for the steady operation of the impact mechanism The total mass of the shank shall not exceed that specified in the table Rated input of tool D Diameter of transfer plate (W) Up to and including 700 Over 700 up to and including 200 Over 200 up to and including 800 Over 800 up to and including 500 (mm) 100 140 180 220 a Distance between centres of grooves (mm) 6,5 5,75 5,0 4,5 M1 Mass of steel base M2 Mass of transfer plate M3 Total mass of punch and shank (kg) (kg) 1,0 2,25 3,8 6,0 (kg) 90 180 270 360 Figure 101 — Testing apparatus for hammers © BSI 25 April 2002 0,7 1,4 2,3 3,4 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page 14 EN 50144-2-6:2000 Figure 102 — Orientation of tool and operator © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page 15 EN 50144-2-6:2000 Operator standing on a device for measuring the force applied to the tool Resilient material Figure 103 — Application of load © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page 16 EN 50144-2-6:2000 l l Length of the inserted tool Figure 104 — Loading device © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Page 17 EN 50144-2-6:2000 Annexes The Annexes of Part are applicable © BSI 25 April 2002 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:33:19 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 50144-2-6:2001 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover Tel: +44 (0)20 8996 9000 Fax: +44 (0)20 8996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of 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