www bzfxw com BRITISH STANDARD BS EN 50144 2 15 2001 Safety of hand held electric motor operated tools — Part 2 15 Particular requirements for hedge trimmers The European Standard EN 50144 2 15 2001 h[.]
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BRITISH STANDARD Safety of hand-held electric motor operated tools — Part 2-15: Particular requirements for hedge trimmers The European Standard EN 50144-2-15:2001 has the status of a British Standard ICS 65.060.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 50144-2-15:2001 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 50144-2-15:2001 National foreword This British Standard is the official English language version of EN 50144-2-15:2001 It supersedes BS EN 50144-2-15:1997 which will be withdrawn on 2003-08-01 The UK participation in its preparation was entrusted by Technical Committee CPL/61, Safety of household and similar electrical appliances, to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 June 2001 Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages to 19 and a back cover The BSI copyright date displayed in this document indicates when the document was last issued Amendments issued since publication Amd No © BSI 06-2001 ISBN 580 37727 X Date Comments Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50144-2-15 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM April 2001 ICS 25.140.20 ; 65.060.80 Supersedes EN 50144-2-15:1997 English version Safety of hand-held electric motor operated tools Part 2-15: Particular requirements for hedge trimmers Sécurité des outils électroportatifs moteur Partie 2-15: Règles particulières pour les taillehaies Sicherheit handgeführter motorbetriebener Elektrowerkzeuge Teil 2-15: Besondere Anforderungen für Heckenscheren This European Standard was approved by CENELEC on 2000-08-01 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 © 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 50144-2-15:2001 E Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50144-2-15:2001 -2- 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 July 1994 and was approved by CENELEC as EN 50144-2-15 on 1995-03-06 A draft for an amendment was submitted to UAP in August 1999 and was approved by CENELEC on 2000-08-01 for inclusion into a second edition of EN 50144-2-15 This European Standard supersedes EN 50144-2-15:1997 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) 2001-10-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2003-08-01 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 provisions of information arising from these measurements and the provisions 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 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 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI -3- EN 50144-2-15:2001 Contents 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Scope Definitions General requirements General conditions for the tests Rating Classification Marking and information for use Protection against electric shock Starting Input and current Heating Leakage current Environmental requirements Moisture resistance Insulation resistance and electric strength Endurance Abnormal operation Mechanical hazards Mechanical strength 11 Construction 11 Components 12 Internal wiring 12 Supply connection and external flexible cables and cords 12 Terminals for external conductors 12 Provision for earthing 12 Screws and connections 12 Creepage distances, clearances and distances through insulation 12 Resistance to heat, fire and tracking 13 Resistance to rusting 13 Radiation 13 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Annexes 19 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50144-2-15:2001 -4- Scope This clause of Part is applicable except as follows: 1.1 Addition: This standard applies to hedge trimmers which are designed for use by one operator, for trimming hedges and bushes utilizing one or more linear reciprocating cutter blades This standard is not applicable to hedge trimmers with a rotating blade or hedge trimmers powered by back-pack or other external source This standard does not give requirements for the design of the tool to reduce the risks arising from noise and vibration Definitions This clause of Part is applicable except as follows: 2.2.18 Replacement: 2.2.18 normal load: Continuous operation with no external load applied, the cutting device being adjusted as for normal use The normal load is based on the rated voltage or upper limit of the rated voltage range Addition: ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 2.2.101 blade tooth: The part of the cutter blade which is sharpened to perform the shearing action See Figure 101 2.2.102 cutter blade: The part of the cutting device having blade teeth which cut the hedge by shearing action either against other blade teeth or against an unsharpened shear plate See Figure 101 2.2.103 cutting device: The part of the assembly of cutter blade and shear plate or the cutter blade together with any supporting part, which performs the cutting action See Figure 101 This may be either single or double sided 2.2.104 cutting length: The effective cutting length of the cutting device measured from the inside edge of the first blade tooth or shear plate tooth to the inside edge of the last blade tooth or shear plate tooth, see Figure 102 Where both blades move the measurements shall be taken when the first and last teeth are furthest apart 2.2.105 front handle: A handle located at or towards the cutting device See Figure 103 2.2.106 rear handle: A handle located furthest from the cutting device See Figure 103 2.2.107 blade control: A device activated by the operator’s hand or fingers for controlling the cutter blade movement 2.2.108 blunt extension: A blunt part of the cutting device or a part of an unsharpened plate fitted to the cutting device which extends beyond the blade teeth See Figure 101 2.2.109 run-down time: The elapsed time from the release of the blade control until the cutter blade stops 2.2.110 maximum speed: The highest motor speed obtainable when adjusted in accordance with the manufacturer’s specifications and/or instructions and with the cutting device engaged Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI -5- EN 50144-2-15:2001 General requirements This clause of Part is applicable General conditions for the tests This clause of Part is applicable except as follows: 4.3 Addition: For the test of subclause 18.104 additional samples may be provided 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: 7.1 Addition: ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Hedge trimmers shall be marked with pictograms/symbols or safety recommendations/warnings of the following substance This requirement also applies to hedge trimmers or accessories which can be fittted to multi-purpose tools Safety recommendations and warnings shall be written in the official language, or one of the official languages, of the country in which they are to be sold - Read the instructions - Do not expose to rain NOTE: For splash-proof or watertight hedge trimmers this warning need not be marked on the electric tool itself Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50144-2-15:2001 -6- - Remove plug from the mains immediately if cable is damaged or cut Marking giving cautionary information shall be located as close as practicable to the relevant hazard Applicable pictograms/symbols shall be in colours contrasting with the background If the marking is cast, embossed or stamped colours are not required 7.13.2 Addition: The instruction sheet shall include, as a minimum, information under the following headings: 1) Identification and nomenclature of parts involved in safety provisions 2) Assembly instructions (if the tool is supplied with parts to be assembled by the user) 3) Meaning of the pictograms/symbols used on the tool 4) Operating instructions including at least the following: - ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ starting and stopping with reference to safety; supply cable, extension cord, type of plug and socket and recommendation for the use of a residual current device; need for the person using the tool to achieve a stable position warning about damp operating conditions; regular maintenance, replacement, sharpening; use of gloves 5) Holding the tool in use, distance from the cutting zone, access to work, cutting height 6) In addition, the substance of the following shall be given: - always ensure all handles and guards are fitted when using the tool - never attempt to use an incomplete machine or one fitted with an unauthorised modification; - before cleaning the hedge trimmer switch off the tool and remove the plug from the mains supply; - check cutting blades regularly for damage, and if damaged repair immediately; - keep cable away from the cutting area; - check cable for damage before starting work and replace if necessary; - never allow children to use the tool; - after use the tool should be stored so that the blade is not exposed Protection against electric shock This clause of Part is applicable except as follows: Additional subclauses: 8.101 The requirements given in this subclause apply to Class II hedgetrimmers and hedge trimmer attachments for use in conjunction with multipurpose tools Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI -7- EN 50144-2-15:2001 Handles shall be constructed either of insulating material or of metal having a fixed insulating covering complying with the requirements for supplementary insulation Handles shall be so designed that when held as in normal use the risk of any part of a hand of the user coming into contact with metal parts which are in electrical contact with the shear blades is prevented Compliance is checked by inspection and by the tests of 15.3, applied to the handles and carried out after the test specified in 19.3 Moreover, the covering of insulation material of metal handles shall comply with the following test: A sample of the covered part is conditioned at a temperature of 70 °C ± °C for days (168 h) After conditioning, the sample is allowed to attain approximately room temperature The covering shall not shrink to the extent that the required insulation is no longer given Neither shall the covering peel off such that it may move longitudinally The sample is then maintained for h at temperature of –10 °C ± °C While still at this temperature, the sample is subjected, in a device as shown in Figure 104, to an impact load applied by means of a weight “A” having a mass of 300 g and falling from a height of 350 mm onto a chisel “B” of hardened steel, the edge of which is placed on the sample as shown in Figure 104 One impact is applied to each place where the covering is likely to be weak or is likely to be damaged in normal use, the distance between the points of impact being at least 10 mm After this test, the covering shall not have peeled off and an electric strength test shall be carried out between metal parts and metal foil wrapped round the covering of the handle shaft The test voltage of 2500 V is applied for During this test, no flashover or breakdown shall occur Starting This clause of Part is applicable 10 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Input and current This clause of Part is applicable except as follows: 10.1 This subclause is not applicable 11 Heating This clause of Part is applicable except as follows: 11.5 Addition: The hedge trimmer is operated for 30 12 Leakage current This clause of Part is applicable Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50144-2-15:2001 13 -8- Environmental requirements This clause of Part is applicable except as follows: 13.2.3 Replacement: Hedge trimmers are tested at no-load Three consecutive tests shall be carried out and the result of the test Lwa shall be the arithmetic mean, rounded off to the nearest decibel, of the three tests The tool is suspended in such a way as to correspond to normal use 13.2.4 Addition: The cutting device shall be horizontal 13.3.3 Replacement of paragraph 1: Measurements are made in the ‘Z’ direction only 13.3.7 Replacement of paragraphs and 3: Hedge trimmers are tested at no-load the tool being held as in normal use with the cutting device horizontal 14 Moisture resistance This clause of Part is applicable 15 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Insulation resistance and electric strength This clause of Part is applicable 16 Endurance This clause of Part is applicable except as follows: 16.2 Addition: During the test, the cutting device is lubricated, as necessary, to avoid undue friction 17 Abnormal operation This clause of Part is applicable Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI -9- 18 EN 50144-2-15:2001 Mechanical hazards This clause of Part is applicable except as follows: Additional subclauses: 18.101 Handles For the number of handles see Table 101 Handles shall be designed in such a way that each one can be grasped with one hand The gripping surface shall be at least 100 mm long On bail or closed handles (U-shaped handles) this dimension is related to the inner width of the gripping surface On straight handles it is the complete length between the housing and the end of the handle There shall be a minimum radial clearance of 25 mm around the gripping length If a part containing the motor complies with the dimensions above for a handle, it may be considered as a handle The gripping length of a bail or closed handle comprises any length that is straight or curved at a radius greater than 100 mm together with any bend radius up to 10 mm at either or both ends of the gripping surface If a straight handle is supported centrally (i.e T type) the gripping length is calculated as follows: a) for handles with a periphery (not including the support) less than 80 mm the gripping length is the sum of the two parts either side of the support; b) for handles with a periphery (not including the support) of 80 mm or more the gripping length is the complete length from end to end ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ If applicable, the part of the handle containing the blade control actuator is counted as part of the handle gripping length Finger grip or similar superimposed profiles shall not affect the method of calculating handle gripping length Handles shall be positively locked in position If they are adjustable in different positions it shall not be possible to lock them in a position not complying with the requirements of this standard For handles which are adjustable without the use of a tool it shall not be possible to alter the handle position when the cutting device is in operation When altering the handle position the cutting device shall be inoperable Compliance is checked by inspection and measurement 18.102 Hand protection 18.102.1 spread out From any handle it shall not be possible to touch the moving cutter blade with fingers Compliance is checked by the test of 18.102.2 18.102.2 The requirements are met if all handles are located so that the test distance from the cutter blade to the side furthest from the cutter blade of any handle is not less than 120 mm The distance is measured along the shortest path from the side of the handle furthest from the cutter blade to the nearest cutting edge of the cutter blade (see Figure 105) If there is a guard the distance is measured from the furthest side of the handle to the guard and from there to the nearest cutting edge of the cutter blade (see Figure 105) Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50144-2-15:2001 - 10 - 18.103 Cutting device To safeguard against contact with the cutter blade, hedge trimmers shall be constructed to meet the requirements given in Table 101 Table 101 Category No Cutting length ≤ 200 mm > 200 mm > 200 mm > 200 mm Minimum number of handles 2 Number of handles with blade control 1 2 Maximum stopping time No requirement No requirement 1s 1s Figure 106 Figure 106 Figure 106 or 107 Figure 108 Cutting device Blunt extensions shall extend over the full length of the cutting device for blade configurations according to Figures 106 and 107 For cutting devices with a blade configuration as shown in Figure 108 the blunt extensions shall reach a distance of at least 400 mm from any point of the rear face of the front handle (see Figure 109) If the front handle is located part way along the cutting device the blunt extensions shall start at the first blade tooth and continue until the 400 mm minimum distance beyond the rear of the front handle is reached Blunt extensions are not required for Figure 108 type blade configurations where there are two handles and the front handle is permanently fixed to the smooth side of a single sided cutting device 18.104 Blade stopping time ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ The cutting device stopping mechanism shall meet the stop time requirement (see Table 101) with the hedge trimmer adjusted and lubricated as recommended by the manufacturer Compliance is checked by the test of 18.104.2 carried out in accordance with 18.104.1 18.104.1 The hedge trimmer shall be mounted and instrumented in such a manner that the results of the test are not affected If an external starting device is used it shall not influence the results The means for operating the hedge trimmer during the test shall be such that the blade control is released abruptly from the full “on” position and returns to the off position by itself A device to detect the moment of release of the blade control shall be provided The running speed ("m") of the hedge trimmer during the test shall be the maximum speed Tachometers shall have an accuracy of ± 2,5 % and the time recording measurement system shall have a total accuracy of ± 25 ms Figure 110 gives a schematic representation of two cycles Each cycle shall consist of the following sequence: - accelerate the blade from rest to the maximum speed - (time = ts); - hold it at this speed for a short time to ensure that it is stable - (time = tr); - release the blade control and allow the blade to come to rest - (time tb); - allow a short time at rest before commencing the next cycle - (time = to) Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI - 11 - EN 50144-2-15:2001 If the total time for one cycle is tc then tc = ts + tr + tb + to The test cycle times for "on” (ts+tr) and "off” (tb+to) shall be decided by the manufacturer but shall not exceed 100 s "on" and 20 s “off” NOTE: This test is not representative for normal use and therefore the cycle times are to be specified by the manufacturer to avoid unnecessary wear or damage to the machine Ten on/off operations of the blade control shall be carried out prior to the test, the cutting device and stopping mechanism being adjusted in accordance with the manufacturer‘s instructions Stopping time is measured from the moment of release of the blade control until the cutter blade has reached the end of the last full stroke Where there are two blade controls half the test cycles and stop time measurements shall be carried out on each 18.104.2 For hedge trimmers where the stopping mechanism can be adjusted and maintained and the manufacturer instructs the user to have this carried out at regular intervals, the test sequence shall consist of a total of 306 cycles Measurement of the stopping time of the cutting blades shall be made for the first six cycles of each 50 cycles of operation and the final six cycles of the test sequence During the test no adjustments shall be made For hedge trimmers where the stopping mechanism is not adjustable, the test sequence shall consist of a total of 506 cycles Measurement of the stopping time of the cutting blade shall be made for the first six cycles of operation and the final six cycles of the test sequence The hedge trimmer shall be lubricated in accordance with the manufacturer‘s instructions No other stopping times shall be recorded Each of the measured stopping times shall comply with the requirements of Table 101 If the sample fails to complete the full number of cycles but otherwise meets the requirements of this test, either the machinery may be repaired, if the stopping mechanism is not affected, and the test continued or, if the machine cannot be repaired, one further sample may be tested which must then comply fully with the requirements ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ The test sequence need not be continuous, however any period or periods of operation shall only be stopped after a set of six measured cycles 18.105 Transport guard A protective cover shall be provided with the hedge trimmer to cover the stationary cutting device in order to prevent injuries during transportation Such a cover shall not expose more than 20% of the maximum cutting length The cover shall not become detached with the cutting device of the hedge trimmer in a vertical downwards position Compliance is checked by inspection 19 Mechanical strength This clause of Part is applicable 20 Construction This clause of Part is applicable except a follows: 20.11 Replacement: Hedge trimmers shall be fitted with at least one mains switch operated by a blade control There shall be no arrangement to lock a blade control in the “on” position and the cutting device shall stop when any blade control is released Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50144-2-15:2001 - 12 - Hedge trimmers shall be fitted with one or two blade controls in accordance with Table 101 and be so designed that the hazards due to inadvertent starting are reduced to a minimum This shall be deemed to be met if either of the following options is fulfilled: a) for hedge trimmers having either one or two handles, one blade control requires two separate and dissimilar actions before the cutting device operates, or: b) the hedge trimmer has two handles with a blade control in each handle, for neither of which two separate and dissimilar actions are required before the cutting device operates, and the blunt extensions, if they are required by 18.103, extend the full length of the cutting blade Compliance shall be checked by inspection Additional subclause: 20.101 Hedge trimmers shall not be of Class I construction Compliance is checked by inspection 21 Components This clause of Part is applicable except as follows: 21.2 Replacement: All “on/off” switches shall be for suitable for frequent operation 22 Internal wiring ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ This clause of Part is applicable 23 Supply connection and external flexible cables and cords This clause of Part is applicable 24 Terminals and external conductors This clause of Part is applicable 25 Provision for earthing This clause of Part is not 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 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI - 13 - 28 EN 50144-2-15:2001 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 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50144-2-15:2001 - 14 - Cutter blade Blade tooth Unsharpened shear plate Blunt extension Cutting device Blunt extension Cutter blade ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Blade tooth Unsharpened shear plate Cutting device Figure 101 - Cutting device Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI - 15 - EN 50144-2-15:2001 Cutting length Figure 102 - Measurement of cutting length Front handle ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Rear handle Cutting device Guard Blade tooth Figure 103 - Major parts of a hedge trimmer Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50144-2-15:2001 - 16 - Weight A Fixing arm Chisel B material: hardened steel Sample ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Base having a mass of 10 kg Dimensions in mm Figure 104 - Impact test apparatus Figure 105 - Measurement of reach distance Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI - 17 - EN 50144-2-15:2001 d1 ≤ mm (closest distance between adjacent blunt extensions measured outboard of the blade teeth) d2 ≥ mm (minimum depth of blunt extensions) Extending blunt part of the cutting device or unsharpened plate Figure 106 - Examples of cutting device configuration options for categories 1, and (see Table 101) - may be single or double sided d1 ≤ 12 mm (closest distance between adjacent blunt extensions measured outboard of the blade teeth) ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ d2 ≥ mm (minimum depth of blunt extensions) Extending blunt part of the cutting device or unsharpened plate Figure 107 - Examples of cutting device configuration options for category (see Table 101) - may be single or double sided Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 12:19:33 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50144-2-15:2001 - 18 - Extending blunt part of the cutting device or unsharpened plate Dimensions in mm ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Figure 108 - Cutting device configuration option for category (see Table 101) – may be single or double sided