1、BRITISH STANDARD BS ISO 7113:1999 Portable hand-held forestry machines Cutting attachments for brush cutters Single piece metal blades ICS 65.060.80BSISO7113:1999 This British Standard, having been prepared under the directionof the Engineering SectorCommittee, was publishedunder the authority ofthe
2、 Standards Committee andcomes into effect on 15July1999 BSI 04-2000 ISBN 0 580 32673 X National foreword This British Standard reproduces verbatim ISO7113:1999and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee AGE/29, Agricultu
3、ral and forestry machinery, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European
4、developments and promulgate them in the UK. A list of organizations represented on this committee 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
5、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 th
6、eir correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO title page, pages ii to iv, pages 1 to 3 and a back cover. This standard has be
7、en updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO7113:1999 BSI 04-2000 i Contents Page National foreword Inside front cover Foreword iii Te
8、xt of ISO 7113 1ii blankBSISO7113:1999 ii BSI 04-2000 Contents Page Foreword iii 1 Scope 1 2 Normative reference 1 3 Definitions 1 4 Blade surface quality 1 5 Blade material 1 6 Dimensions and tolerances of saw blades 1 7 Marking 1 Figure 1 V-block for the bend test 2 Figure 2 Saw blade dimensions 2
9、 Figure 3 Verification of run-out X 3 Table 1 Dimensions for saw blades 3 Descriptors: Forest equipment, portable equipment, brush cutters, blades, specifications, dimensions, tests, bend tests, marking.BSISO7113:1999 BSI 04-2000 iii Foreword ISO (the International Organization for Standardization)
10、is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be repres
11、ented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standard
12、s adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO7113was prepared by Technical Committee ISO/TC23, Tractors and machinery for
13、agriculture and forestry, SubcommitteeSC17, Manually portable forest machinery. This third edition cancels and replaces the second edition (ISO7113:1991), of which it constitutes a technical revision. It extends the field of application to all single-piece metal blades for brush cutters, including c
14、ircular saw blades. The requirement for the blade retention torque has been deleted; it will be dealt with instead in the machine safety standard for brush cutters and grass trimmers.iv blankBSISO7113:1999 BSI 04-2000 1 1 Scope This International Standard specifies the requirements for the material
15、and marking of single-piece metal blades for portable hand-held brush cutters as well as the basic dimensions and tolerances for saw blades for portable hand-held brush saws. 2 Normative reference The following standard contains provision which, through reference in this text, constitute provisions
16、of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicat
17、ed below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 7112:, Machinery for forestry Portable hand-held brush-cutters and grass-trimmers Vocabulary 1) . 3 Definitions For the purposes of this International Standard, the definitions given in ISO7112apply.
18、4 Blade surface quality Except for the marking, the blade shall be free from surface imperfections deeper than0,03mm. 5 Blade material 5.1 Requirement The material shall not have any cracks visible to thenaked eye after being submitted to the bend test in 5.2. 5.2 Bend test 5.2.1 Preparation of spec
19、imen Cut a specimen of the blade so that the length is perpendicular to the grain of the material. The specimen shall have a width of (35 5)mm and the length shall be at least10mm longer than 2H (seeFigure 1). If the grain is not visible, cut three specimens in radial directions with 60 difference.
20、The material shall be unlubricated. Carry out the test in a V-block and using a device to bend the specimen, as shown in Figure 1. The width of the V-block and the device shall be at least40mm. The ambient temperature shall be10 C to35 C and the load shall be applied at a rate of1mm/s to10mm/s. 6 Di
21、mensions and tolerances of saw blades These dimensions apply only to saw blades. Dimensions and tolerances shall be in accordance with Figure 2 and Table 1. The verification of run-out X (total indicator reading) shall be in accordance with Figure 3 and Table 1. 7 Marking The blade shall be durably
22、marked with at least: a) the maximum allowed rotational frequency, in revolutions per minute, as determined by the manufacturer, b) the rotational direction (when applicable), c) the name or trade-mark of the manufacturer. 1) To be published. (Revision of ISO7112:1982)BSISO7113:1999 2 BSI 04-2000 Ke
23、y l Length of test specimen t Thickness of test specimen Figure 1 V-block for the bend test Key t Thickness of test specimen Figure 2 Saw blade dimensionsBSISO7113:1999 BSI 04-2000 3 Table 1 Dimensions for saw blades Dimensions in millimetres Blade diameter D Blade thickness t Centrehole diameter d
24、Run-out tolerance X min. 175 1,4 20 0,45 200 1,5 20 0,5 225 1,75 20 0,55 250 2 20 0,6 300 2,25 20 0,75 +5 0 +0,15 0 Key 1 Washer with outside diameter 50 mm Figure 3 Verification of run-out XBS ISO 7113:1999 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independe
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