1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 192-2:1998 ICS 25.140.
2、30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Open-ended wrenches Part 2: BS and WhitworthThis British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes
3、into effect on 15 June 1998 BSI 1998 The following BSI references relate to the work on this standard: Committee reference MTE/15/13 Draft for comment 97/716936 DC ISBN 0 580 29541 9 BS 192-2:1998 Amendments issued since publication Amd. No. Date Text affected Committees responsible for this British
4、 Standard The preparation of this British Standard was entrusted by Technical Committee MTE/15, Hand tools, to Subcommittee MTE/15/13, Spanners, screwdrivers, pliers and nippers, upon which the following bodies were represented: Co opted Members Consumer Policy Committee of BSI Federation of British
5、 Hand Tool Manufacturers Ministry of DefenceBS 192-2:1998 BSI 1998 i Contents Page 1 Scope 1 2 Normative references 1 3 Hardness 1 4 Finish 1 5 Marking 1 6 Form and dimensions 1 7 Resistance to torque 1 Annex A (normative) Torque test 3 Annex B (informative) Guidance on safe usage 4 Table 1 Wrench d
6、etails and test torque 2 Table A.1 Details of test mandrel 3 Figure 1 Wrench form 1 Figure A.1 Torque test: location of test mandrel 3ii BSI 1998 BS 192-2:1998 Foreword This British Standard has been prepared by Technical Committee MTE/15, and, together with BS 192-1:1996, supersedes BS 192:1982, wh
7、ich is withdrawn. This British Standard supersedes the parts of BS 192:1982 that deal with Whitworth and BS wrench sizes. The tolerances across flats of openings have been amended from the previous edition to align more closely with, but not identically to, the tolerances given in ISO (International
8、 Organization for Standardization) standards. Apart from nominal thread sizes, all dimensions are in millimetres. Materials for manufacture of wrenches are not specified, but torque requirements are specified to ensure a minimum level of performance. Summary of pages This document comprises a front
9、cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. BSI 1998 1 BS 192-2:1998 Figure 1 Wrench form 1 Scope This British Standard specifies design, dimensional and testing requirements for open ended wrenches for BS hexagon headed bolts, screws and nuts a
10、s specified in BS 916 and BS 1083. 2 Normative references The following normative documents contain provisions that, through reference in this text, constitute provisions of this part of this British Standard. For dated references, subsequent amendments to, or revisions of, any of these publications
11、 do not apply. For undated references, the last edition of the cited publication applies. BS 916:1953 (obsolescent), Specification for black bolts, screws and nuts, hexagon and square, with BSW threads, and partly machined bolts, screws and nuts, hexagon and square, with BSW and BSF threads. BS 1083
12、:1965 (obsolescent), Specification for precision hexagon bolts, screws and nuts (BSW and BSF) threads. BS EN 10109-1:1996, Metallic materials, hardness test Rockwell test (scales A, B, C, D, E, F, G, H, K) and Rockwell superficial test (scales 15N, 30N, 45N, 15T, 30T, 45T). 3 Hardness The hardness o
13、f the wrench shall be (39 to 48) HRC inclusive when determined in accordance with BS EN 10109-1. 4 Finish All sharp edges shall be removed and wrenches shall be free from cracks, burrs and any other deleterious defects that may adversely affect the performance of the wrench, or, during proper use of
14、 the wrench, give rise to risk of injury to the user. Any protective finish shall conform to the appropriate British Standard. 5 Marking The wrench shall be plainly and indelibly marked with the following: a) the size of each jaw opening, in two formats: 1) the first giving the nominal diameter of a
15、 bolt to be fitted by the wrench, with a head size as specified in BS 916 or BS 1083, followed by the letters “BS” (e.g. 3/8BS); and 2) the second giving the nominal diameter of a bolt to be fitted by the wrench, with a head size conforming to Whitworth large hexagon sizes, followed by the letter “W
16、” (e.g. 5/16W); b) the name or trade mark of the manufacturer or responsible supplier. 6 Form and dimensions The form and dimensions of the wrench shall conform to Figure 1 and Table 1. 7 Resistance to torque When tested in accordance with the method described in annex A, wrenches shall withstand th
17、e minimum test torque requirements given in Table 1. After the test, wrenches shall show no permanent deformation or damage that may adversely affect safe usage.2 BSI 1998 BS 192-2:1998 Table 1 Wrench details and test torque Thread diameters (BS 916 and BS 1083) Thread diameters (Whitworth large hea
18、d) Across flats Overall length L Head width Head thickness E Test torque S 1 S 2 min. max. B 1 (max.) B 2 (max.) min. max. Small end Large end min. max. min. max. in in mm mm mm mm mm mm mm mm mm mm Nm Nm 1/43 5/16 3/163 1/4 11.35 11.55 13.38 13.58 155 180 30 34 3.9 5.2 38 58 5/163 3/8 1/43 5/16 13.
19、38 13.58 15.29 15.49 180 210 36 38 4.5 6.0 58 85 3/83 7/16 5/163 3/8 15.29 15.49 18.11 18.38 180 210 41 45 5.1 6.8 85 135 7/163 1/2 3/83 7/16 18.11 18.38 20.91 21.18 215 250 45 51 6.3 8.4 135 202 1/23 9/16 7/163 1/2 20.91 21.18 23.44 23.76 230 270 51 57 7.2 9.6 202 278 9/163 5/8 1/23 9/16 23.44 23.7
20、6 25.73 26.05 245 290 57 59 7.5 10.0 278 359 5/83 11/16 9/163 5/8 25.73 26.05 28.04 28.39 265 315 57 66 8.4 11.6 359 461 11/163 3/4 5/83 11/16 28.04 28.39 30.58 30.93 275 325 66 70 8.7 12.4 461 586 3/43 7/8 11/163 3/4 30.58 30.93 33.12 33.52 300 370 70 76 9.8 14.0 586 731 7/83 1 3/43 7/8 33.12 33.52
21、 37.69 38.14 300 370 76 87 10.1 14.4 731 1000 15/163 1 1/16 7/83 1 35.41 35.81 40.13 40.63 335 400 83 93 11.5 16.4 894 1154 13 1 1/8 15/163 1 1/16 37.69 38.14 42.57 43.07 335 400 87 98 11.5 16.4 1000 1271 1 1/83 1 1/4 13 1 1/8 42.57 43.07 47.39 47.89 365 450 98 104 12.9 18.4 1271 1572 1 1/43 1 3/8 1
22、 1/83 1 1/4 47.39 47.89 52.22 52.77 390 500 104 118 14.0 20.0 1572 1912 1 3/83 1 1/2 1 1/43 1 3/8 52.22 52.77 56.59 57.09 425 510 118 127 16.8 24.0 1912 2239 1 1/23 1 5/8 1 3/83 1 1/2 56.59 57.09 61.41 61.91 455 540 127 133 16.8 24.0 2239 2633 1 5/83 1 3/4 1 1/23 1 5/8 61.41 61.91 65.78 66.38 490 65
23、0 133 146 18.5 26.5 2633 3004 1 3/43 2 1 5/83 1 3/4 65.78 66.38 70.35 70.95 520 680 146 154 20.0 28.5 3004 3443 23 2 1/4 1 3/43 2 70.35 70.95 80.26 80.96 580 750 154 175 23.0 32.0 3443 4474Annex A BS 192-2:1998 BSI 1998 3 Figure A.1 Torque test: location of test mandrel Annex A (normative) Torque te
24、st A.1 Apparatus The test mandrel dimensions shall conform to Table A.1. The test mandrel height shall not be less than the thickness of the wrench head. The test mandrel shall have a minimum hardness of 55 HRC. A.2 Procedure Fully engage the wrench on the test mandrel as shown in Figure A.1. Apply
25、a gradually increasing force until the minimum test torque is reached (see Table 1). NOTE 1 The torque is calculated as the product of the magnitude of the load and the distance between the point of application of the load and the centre of the test mandrel. NOTE 2 A device in which the mandrel can
26、be rotated at the chosen torque (see Table 1), determined with an accuracy of 2.5 %, may alternatively be used for this test. Table A.1 Details of test mandrel Nominal bolt diameters (BS 916 and BS 1083) Across flats S Height H (min.) min. max. in mm mm mm 1/4 11.27 11.30 6 5/16 13.31 13.34 6 3/8 15
27、.21 15.24 7 7/16 18.00 18.03 9 1/2 20.80 20.83 10 9/16 23.34 23.37 10 5/8 25.62 25.65 12 11/16 27.91 27.94 13 3/4 30.44 30.48 14 7/8 32.98 33.02 15 15/16 35.27 35.31 17 1 37.55 37.59 17 1 1/16 39.94 39.98 18 1 1/8 42.38 42.42 19 1 1/4 47.20 47.24 20 1 3/8 52.02 52.07 24 1 1/2 56.34 56.39 24 1 5/8 61
28、.16 61.21 27 1 3/4 65.48 65.53 29 2 70.05 70.10 32 2 1/4 79.96 80.01 414 BSI 1998 BS 192-2:1998 Annex B Annex B (informative) Guidance on safe usage The correct size of wrench for the fastener should always be used. The wrench should always be held firmly, and the stance of the user adjusted to prev
29、ent a fall if the tool slips. It should always be ensured that the wrench is fully engaged on the fastener and square to the fastener axis. Open ended wrenches should only be used for their designed purpose. They should not be used as a striking tool. The length should never be increased by using tu
30、bes, extensions or locking wrenches together to free frozen fasteners. Wrenches should not be exposed to excessive heat, as this may affect the temper and result in premature failure. The shape of the wrench should not be modified (e.g. by grinding wheel). Wrenches should be inspected regularly for
31、signs of damage or wear, and replaced as required. Extreme care should be taken not to confuse plastic comfort grips with grips with electrical insulating properties, which should be marked.blankBSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
32、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Stand
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