1、BRITISH STANDARD BS1919-1: 1993 Hacksaw blades Part 1: Specification for hand and machine hacksaw bladesBS1919-1:1993 This British Standard, having been prepared under the directionof the Machine, Engineers and Hand Tools Standards Policy Committee, waspublished under the authorityof the Standards B
2、oardand comes into effect on 15 November1993 BSI04-1999 First published January 1953 Second edition September 1967 Third edition July 1974 Fourth edition December 1983 Fifth edition November 1993 The following BSI references relate to the work on this standard: Committee reference MTE/8 Draft for co
3、mment93/701076 DC ISBN 0 580 22477 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Machine, Engineers and Hand Tools Standards Policy Committee (MTE/-) to Technical Committee MTE/8, upon which the following bodies were represented: Ass
4、ociation of Engineering Distributors Ltd. British Engineers Cutting Tools Association British Hacksaw and Bandsaw Manufacturers Association Gauge and Tool Makers Association Ministry of Defence Amendments issued since publication Amd. No. Date CommentsBS1919-1:1993 BSI 04-1999 i Contents Page Commit
5、tees responsible Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Definitions 1 4 Dimensions and number of teeth 3 5 Bend requirement for hand blades 3 6 Marking 3 Annex A (normative) Bend test for hand blades 6 Figure 1 Elements of a hacksaw blade 1 Figure 2 Linear dimensions 2 Figure 3 Bl
6、ade set 4 Figure A.1 Bend test for all-hard type hand blades 6 Figure A.2 Bend test for flexible and bi-metal type hand blades 7 Table 1 Dimensions of hand hacksaw blades 5 Table 2 Dimensions of machine hacksaw blades 5 List of references Inside back coverBS1919-1:1993 ii BSI 04-1999 Foreword This P
7、art of BS1919 has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee. First published in1953, BS1919 was revised in1967, partly to achieve a rationalization of sizes but also as a step towards metrication. The standard was further revised in1974 to
8、take into account international agreement within ISO on hacksaw blades and to add the flexible type of high speed steel hacksaw blade. BS1919 was further revised in1983 to include the important bi-metal types of hacksaw blade and requirements for both power and hand hacksaw blades. The present revis
9、ion of BS1919 divides the1983 edition into two Parts as follows. BS1919-1 specifies the dimensions of hand and machine hacksaw blades and also includes the static bend test for hand blades only. This Part of BS1919 has been produced in advance of the related standard ISO 2336 that is being prepared
10、by the International Organization for Standardization (ISO). A further Part of BS1919 will cover the performance testing of hand and machine hacksaw blades. BS1919-1 and BS1919-2 together supersede BS1919:1983, which is withdrawn. A British Standard does not purport to include all the necessary prov
11、isions 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. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to8, an in
12、side back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.BS1919-1:1993 BSI 04-1999 1 1 Scope This Part of BS1919 specifies the dimensions and static testing o
13、f hand hacksaw blades and the dimensions of machine hacksaw blades. It is applicable to single edge blades of length not greater than750mm, the tooth pitch of which is not greater than6.3mm (or four teeth in25 mm). 2 References 2.1 Normative references This Part of BS1919 incorporates, by reference,
14、 provisions from specific editions of other publications. These normative references are cited at the appropriate points in the text and the publications are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to this Part of BS1919 only when i
15、ncorporated in it by updating or revision. 2.2 Informative references This Part of BS1919 refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made
16、to the latest editions. 3 Definitions For the purposes of this Part of BS1919, the following definitions apply. NOTE 1The elements defined in3.1 to3.11 are shown inFigure 1. NOTE 2The linear dimensions defined in3.12 to3.17 are shown in Figure 2. Figure 1 Elements of a hacksaw bladeBS1919-1:1993 2 B
17、SI 04-1999 3.1 datum line the longitudinal line which passes through the centre of the blade width 3.2 pin hole (d) the hole at each end of the blade by means of which the blade is held and tensioned when in use NOTEThe pin holes will normally be located on the centre line of the blade, but may in s
18、ome instances be offset towards the toothed edge of the blade whilst remaining essentially parallel to that edge. 3.3 teeth the serrations formed across the thickness of the blade to provide cutting edges 3.4 toothed edge the longitudinal edge along which the teeth have been formed 3.5 tooth cutting
19、 edge the transverse edge of each tooth, formed by the intersection of the flank and the face 3.6 face the surface of the tooth adjacent to the cutting edge, on which the chip impinges as it is cut from the material being sawn 3.7 flank the surface behind the cutting edge of the tooth which extends
20、to the root radius 3.8 root radius the radius connecting the face of one tooth and the flank of the preceding one 3.9 gullet the space bounded by the face, root radius and flank of a tooth which permits chip removal 3.10 back edge the longitudinal edge parallel to the toothed edge 3.11 side one of t
21、he flat surfaces between the toothed edge and the back edge 3.12 blade length (l) the dimension between the centres of the pin holes Figure 2 Linear dimensionsBS1919-1:1993 BSI 04-1999 3 3.13 overall length (L) the dimensions between the ends of the blade measured along its centre line 3.14 width (a
22、) the dimension between the toothed edge and the back edge 3.15 thickness (b) the dimension between the two sides, excluding any set 3.16 pitch (P) the distance between the adjacent cutting edges NOTEThis is measured in millimetres. 3.17 number of teeth (N) the number of teeth contained in any25mm l
23、ength measured along the toothed edge NOTEThe internationally agreed pitches of teeth and corresponding numbers of teeth per25mm are as follows: 3.18 size designation the blade length, width, thickness and pitch (and number of teeth per25 mm) NOTESize designation is always expressed in that order as
24、 shown in the following examples (in millimetres): 300 12.5 0.63 1.4 or 300 12.5 0.63 1.4 (18) 3.19 set the projection of the teeth from the sides of the blade to provide clearance (see Figure 3) 3.20 high speed steel all-hard blade a hacksaw blade manufactured from high speed steel and, except for
25、the area adjacent to the pin holes, uniformly hardened and tempered throughout 3.21 high speed steel flexible blade a hacksaw blade manufactured from high speed steel with a uniformly hardened and tempered toothed edge, the centre of the blade in the soft condition and the back edge either soft or h
26、ard 3.22 bi-metal high speed flexible steel blade a hacksaw blade with a fully hardened and tempered high speed steel toothed edge that is joined to a spring steel backing 3.23 low alloy steel flexible blade a hacksaw blade manufactured from a high carbon steel which contains sufficient alloy additi
27、on to significantly enhance the wear resistance properties 4 Dimensions and number of teeth 4.1 Hand hacksaw blades Dimensions shall be as given in Table 1. 4.2 Machine hacksaw blades Dimensions shall be as given in Table 2. 5 Bend requirement for hand blades When tested in accordance with Annex A,
28、blades shall not bend permanently or fracture. 6 Marking Each hacksaw blade, and the package in which the blade is contained, shall be clearly and permanently marked with the following information: a) the number and date of this British Standard, ie.BS1919-1:1993; 1) b) material designations (see3.2
29、0 to3.23); c) manufacturers name or trade mark. P 0.8 1.0 1.4 1.8 2.5 4.0 6.3 N 32 24 18 14 10 6 4 1) Marking BS1919-1:1993 on or in relation to a product represents a manufacturers declaration of conformity, i.e.a claim by or on behalf of the manufacturer that the product meets the requirements of
30、the standard. The accuracy of the claim is solely the claimants responsibility. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable.BS1919-1:1993 4 BSI 04-1999 Figure 3 Blade setBS1919-1:1993 BSI 04-1999 5 Table 1 Dimensions of hand hack
31、saw blades Table 2 Dimensions of machine hacksaw blades Blade length Nominal width Nominal thickness Nominal teeth spacing a Overall length Pin hole diameter l a b Pitch Number of teeth in25mm L d ( 2) mm mm P N (max.) H14 b mm mm mm mm 300 12.5 0.63 0.8 32 315 1.0 24 1.4 18 1.8 14 a See Figure 2. b
32、 In accordance with BS4500-1.2:1990 Blade length Nominal width Nominal thickness Nominal teeth spacing a Overall length Pin hole diameter l a b Pitch Number of teeth in 25mm L d b ( 2) mm mm P N (max.) H14 c mm mm mm mm 300 25 1.25 1.8 14 330 2.5 10 350 25 1.25 1.8 14 380 2.5 10 32 1.60 2.5 10 4.0 6
33、 400 32 1.60 2.5 10 430 4.0 6 38 2.00 4.0 6 6.3 4 450 32 1.60 2.5 10 485 4.0 6 38 2.00 4.0 6 6.3 4 500 38 2.00 4.0 6 535 50 2.50 4.0 6 6.3 4 525 38 2.00 2.5 10 560 4.0 6 45 2.25 4.0 6 6.3 4 600 45 2.25 4.0 6 635 50 2.50 4.0 6 6.3 4 700 50 2.50 4.0 6 735 6.3 4 750 63 2.50 6.3 4 805 a See Figure 2. b
34、The diameter d of pin holes of machine hacksaw blades has been unified in the United States to0.281in or7.1mm, and0.326in or9.8mm. c In accordance with BS4500-1.2:1990. 4 + 0.30 0 8.2 + 0.36 0 8.2 + 0.36 0 8.2 + 0.36 0 10.2 + 0.43 0 10.2 + 0.43 0 10.2 + 0.43 0 12.5 + 0.43 0 12.5 + 0.43 0 12.5 + 0.43
35、 0BS1919-1:1993 6 BSI 04-1999 Annex A (normative) Bend test for hand blades A.1 Principle The resistance to breakage of hand blades is assessed by bending sample blades round a former. Flexible blades and bi-metal high speed steel types are subject to a more severe bend than all-hard type blades. A.
36、2 High speed, steel all-hard hand blade A.2.1 Apparatus A.2.1.1 Test block, made of steel, 250mm diameter, hardened and ground to give a wear-resistant surface. (SeeFigure A.1.) A.2.2 Procedure Bend each test blade by hand around the periphery of the test block (A.2.1.1), firmly secured to a bench,
37、ensuring that the blade lies flat against the test block surface. On releasing the blade, check for damage. A.3 High speed, steel flexible and bi-metal type blades A.3.1 Apparatus A.3.1.1 Test bar, made of steel60mm in diameter, hardened and ground to give a wear-resistant surface (SeeFigure A.2.) A
38、.3.2 Procedure Bend each test blade around the whole circumference of the test bar (A.3.1.1), ensuring that the blade lies flat against the test bar surface. On releasing the blade, check for damage. Figure A.1 Bend test for all-hard type hand bladesBS1919-1:1993 BSI 04-1999 7 Figure A.2 Bend test f
39、or flexible and bi-metal type hand blades8 blankBS1919-1:1993 BSI 04-1999 List of references (see clause2) Normative references BSI standards publications BRITISH STANDARDS INSTITUTION, London BS4500, ISO limits and fits. BS4500-1, General tolerances and deviations. BS4500-1.2:1990, Tables of common
40、ly used tolerance grades and limits deviations for holes and shafts. Informative references ISO publication INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO), Geneva. (Publication available from BSI Customer Services.) ISO2336:1980, Hand and machine hacksaw blades Dimensions for lengths up to450m
41、m and pitches up to6,3mm 2) . 2) Referred to in the foreword only.BS1919-1: 1993 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the internat
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