1、BRITISH STANDARD BS 3088:1959 Specification for Adjustable hand reamers with inserted bladesBS3088:1959 This British Standard, having beenapproved by the MechanicalEngineering IndustryStandards Committeeand endorsed bytheChairman of the EngineeringDivisional Council,was published undertheauthority o
2、f the GeneralCouncil on 16 February1959 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference MEE/75 Draft for comment CY(MEE)2821 ISBN 0 580345734 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision
3、this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: The Government Departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were d
4、irectly represented on the Committee entrusted with the preparation of this standard: Admiralty* High Commission of India Air Ministry* Institute of Marine Engineers Associated Offices Technical Committee Institute of Petroleum Association of Consulting Engineers Institution of Civil Engineers (Inco
5、rporated) Institution of Gas Engineers British Chemical Plant Manufacturers Institution of Heating and Ventilating Association Engineers British Compressed Air Society Institution of Mechanical Engineers British Electrical and Allied Manufacturers Institution of Mechanical Engineers Association* (Au
6、tomobile Division) British Engineers Association Institution of Production Engineers* British Gear Manufacturers Association Locomotive and Allied Manufacturers British Internal Combustion Engine Association of Great Britain Manufacturers Association Machine Tool Trades Association* British Iron and
7、 Steel Federation Ministry of Labour and National Service British Railways, The British Transport Ministry of Power Commission Ministry of Supply* Crown Agents for Overseas Governments and Ministry of Transport and Civil Aviation Administrations Ministry of Works D.S.I.R. Mechanical Engineering Rese
8、arch National Coal Board Laboratory National Physical Laboratory (D.S.I.R.) Electricity Council, The Generating Boards Radio Industry Council and the Area Boards for England and Wales War Office* Engineering Equipment Users Association Gas Council Board of Trade Milling Cutter and Reamer Association
9、 Gauge and Toolmakers Association N.E. Coast Institution of Engineers and Institute of the Motor Industry (Inc.) Shipbuilders Institution of Engineers and Shipbuilders in Scotland Amendments issued since publication Amd. No. Date CommentsBS3088:1959 BSI 02-2000 i Contents Page Co-operating organizat
10、ions Inside front cover Foreword ii 1 Scope 1 2 Ranges of expansion 1 3 Blades 1 4 General dimensions 1 5 Screw threads 1 6 Lead 1 7 Centres 1 8 Nuts 1 9 Marking 1 Table 1 General dimensions of adjustable hand reamers with inserted blades 2 Table 1A Metric equivalents of general dimensions 3BS3088:1
11、959 ii BSI 02-2000 Foreword This standard makes reference to the following British Standards: BS 1580, Unified screw threads. BS 1916, Limits and fits for engineering Part 1:Limits and tolerances. This British Standard has been prepared under the authority of the Mechanical Engineering Industry Stan
12、dards Committee in response to a request from the Machine Tool and Workshop Plant Sub-committee of the Inter-Services Engineering Standards Co-ordinating Committee. For several years there have been two main types of adjustable hand reamers with inserted blades in production; one type, based on a we
13、ll-known American pattern, is in general commercial use while the other has been used almost exclusively by the Services. Within the two main types there have been variations in nominal sizes and ranges of expansion which led to difficulties in ordering and stocking these tools. The experience of ma
14、nufacturers indicated that the American pattern was generally acceptable to industry and the Services expressed their willingness to adopt it if the variations in sizes and ranges of expansion could be eliminated. The principal task of the Committee responsible for this standard therefore was to est
15、ablish a single type of adjustable reamer and to produce co-ordinated ranges of nominal sizes and expansions. The standard does not purport to give all the detailed information required for the manufacture of these reamers. Since they are recognized as jobbing and not precision tools it is considere
16、d that the specification should confine itself to the essential features necessary to ensure the establishment of a single range of reamers in standard sizes and with standard rates of expansion. A British Standard does not purport to include all the necessary provisions of a contract. Users of Brit
17、ish 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, pages i and ii, pages1 to 3 and a back cover. This standard has be
18、en updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS3088:1959 BSI 02-2000 1 1 Scope This British Standard relates to adjustable hand reamers with inserted blades and specifies ranges of expansion, numbers
19、 of blades and certain general dimensions and features. 2 Ranges of expansion The standard ranges of expansion shall be in accordance with Column1 of Table 1. 3 Blades The number of blades for a given size of adjustable reamer shall be as shown in Column2 ofTable 1. Blades shall be supplied in match
20、ed sets. 4 General dimensions The general dimensions of adjustable hand reamers with inserted blades shall be in accordance withTable 1. Metric equivalents of these dimensions are given inTable 1A. 5 Screw a) General. The screw threads on the body and on the nut shall be of Unified form in accordanc
21、e with BS1580, “Unified screw threads”. Wherever possible, threads of the standard UNF series have been selected and are so indicated in the table. b) Tolerances. The screw threads on the body of adjustable reamers shall conform to the limits and tolerances for Class1A and those in the nut shall con
22、form to the limits and tolerances for Class1B as specified in BS1580, “Unified screw threads”. 6 Lead A lead shall be provided on the cutting portion of adjustable hand reamers. 7 Centres The centres of adjustable reamers shall not be removed, and shall preferably be recessed to protect them from da
23、mage. 8 Nuts Nuts shall be provided with flats as shown in the figure toTable 1. 9 Marking Each adjustable reamer shall be indelibly marked with the size range applicable to it and with the manufacturers name or trademark. BS3088:1959 2 BSI 02-2000 Table 1 General dimensions of adjustable hand reame
24、rs with inserted blades 1 2 3 4 5 6 7 8 9 10 11 Range See Note 1 No. of blades Overall length Length of blade Width of blade and slot Tolerance on blade width h10 Tolerance on widthH9 Thread Shank diameter Square Diameter D 1and pitch Width across flats Length of flats L L 1 W See Note 2 See Note2 S
25、ee Note 3 D 2 A L 2 in. in. in. in. in. in. in. in. in. in. 1 / 4 9 / 32 4 3 1 / 4 1 11 / 32 0.0468 3 / 16 32 UN 0.145 0.117 3 / 16 9 / 32 5 / 16 4 3 1 / 2 1 11 / 32 0.0468 7 / 32 32 UN 0.165 0.129 1 / 4 5 / 16 11 / 32 4 4 1 / 8 1 1 / 2 0.0625 1 / 4 32 UNS 0.200 0.152 1 / 4 11 / 32 3 / 8 4 4 3 / 8 1
26、 1 / 2 0.0625 1 / 4 32 UNS 0.200 0.152 1 / 4 3 / 8 13 / 32 6 4 3 / 4 1 1 / 2 0.0625 9 / 32 24 UN 0.220 0.176 1 / 4 13 / 32 7 / 16 6 5 1 1 / 2 0.0625 5 / 16 24 UNF 0.250 0.187 5 / 16 7 / 16 15 / 32 6 5 1 / 4 1 5 / 8 0.0625 +0.000 0 0.001 6 +0.001 0.000 11 / 32 24 UN 0.282 0.211 5 / 16 15 / 32 17 / 32
27、 6 5 1 / 2 1 5 / 8 0.0625 3 / 8 24 UNF 0.310 0.234 3 / 8 17 / 32 19 / 32 6 5 3 / 4 1 13 / 16 0.0625 13 / 32 24 UN 0.343 0.258 3 / 8 19 / 32 21 / 32 6 6 1 / 2 2 1 / 16 0.0937 7 / 16 20 UNF 0.363 0.281 7 / 16 21 / 32 23 / 32 6 6 3 / 4 2 3 / 16 0.0937 1 / 2 20 UNF 0.422 0.316 1 / 2 23 / 32 25 / 32 6 7
28、2 1 / 2 0.0937 9 / 16 18 UNF 0.480 0.363 9 / 16 25 / 32 27 / 32 6 7 3 / 8 2 5 / 8 0.0937 5 / 8 18 UNF 0.538 0.422 9 / 16 27 / 32 15 / 16 6 8 3 0.1250 11 / 16 16 UN 0.593 0.445 5 / 8 15 / 16 1 1 / 16 6 9 3 1 / 4 0.1250 3 / 4 16 UNF 0.656 0.492 11 / 16 1 1 / 16 1 3 / 16 6 10 3 3 / 8 0.1562 7 / 8 14 UN
29、F 0.750 0.562 11 / 16 1 3 / 16 1 11 / 32 6 11 3 7 / 8 0.1562 +0.000 0 0.001 8 +0.001 2 0.000 0 7 / 8 14 UNF 0.750 0.562 11 / 16 1 11 / 32 1 1 / 2 6 12 4 1 / 4 0.1562 1 14 UN 0.875 0.656 13 / 16 1 1 / 2 1 13 / 16 6 14 4 7 / 16 0.1562 1 7 / 32 14 UN 1.062 0.797 1 1 13 / 16 2 7 / 32 6 16 5 0.1875 1 1 /
30、 2 12 UNF 1.375 1.031 1 1 / 4 2 7 / 32 2 3 / 4 6 18 4 7 / 8 0.1875 +0.000 0 0.002 2 +0.001 4 0.000 0 1 7 / 8 12 UN 1.750 1.312 1 5 / 8 2 3 / 4 3 11 / 32 6 20 5 1 / 4 0.2500 2 1 / 8 12 UN 2.000 1.500 1 3 / 4 NOTE 1A slight overlap is allowed between one range and the next. NOTE 2These tolerances are
31、extracted from BS1916, “Limits and fits for engineering”, Part1, “Limits and tolerances”. NOTE 3UNF = Unified Fine Series.UNS = Unified Special.UN=Unified Form in accordance with BS1580, “Unified screw threads”. BS3088:1959 BSI 02-2000 3 Table 1A Metric equivalents of general dimensions (SeeFigure1)
32、 1 2 3 4 5 6 7 8 9 10 11 12 Range See Note 1 No. of blades Overall length Length of blade Width of blade and slot W Tolerance on blade width h10 Tolerance on widthH9 Thread Shank diameter Square Diameter Pitch Width across flats Length L See Note1 See Note 2 See Note2 D 1 D 2 A L 2 mm mm mm mm mm mm
33、 mm mm mm mm mm 6.30 7.15 4 82.50 34.25 1.189 4.762 0.7937 3.68 2.97 4.76 7.15 8.00 4 89.00 34.25 1.189 5.556 0.7937 4.19 3.28 6.35 8.00 8.75 4 104.75 38.00 1.588 6.350 0.7937 5.08 3.86 6.35 8.75 9.50 4 111.25 38.00 1.588 6.350 0.7937 5.08 3.86 6.35 9.50 10.25 6 120.75 38.00 1.588 7.144 1.0583 5.59
34、4.47 6.35 10.25 11.00 6 127.00 38.00 1.588 +0.000 0.040 +0.025 0.000 7.938 1.0583 6.35 4.75 7.94 11.00 12.00 6 133.25 41.25 1.588 8.731 1.0583 7.16 5.36 7.94 12.00 13.50 6 139.75 41.25 1.588 9.525 1.0583 7.87 5.94 9.52 13.50 15.00 6 146.00 46.00 1.588 10.319 1.0583 8.71 6.55 9.52 15.00 16.75 6 165.0
35、0 52.50 2.380 11.112 1.2700 9.22 7.14 11.11 16.75 18.25 6 171.50 55.50 2.380 12.700 1.2700 10.72 8.03 12.70 18.25 19.75 6 177.75 63.50 2.380 14.288 1.4111 12.19 9.22 14.29 19.75 21.50 6 187.25 66.75 2.380 15.875 1.4111 13.66 10.72 14.29 21.50 23.75 6 203.25 76.00 3.175 17.462 1.5875 15.06 11.30 15.8
36、8 23.75 27.00 6 228.50 82.50 3.175 19.050 1.5875 16.66 12.50 17.46 27.00 30.25 6 254.00 85.75 3.967 +0.000 0.048 +0.030 0.000 22.225 1.8143 19.05 14.28 17.46 30.25 34.25 6 279.50 98.50 3.967 22.225 1.8143 19.05 14.28 17.46 34.25 38.00 6 304.75 108.00 3.967 25.400 1.8143 22.22 16.66 20.64 38.00 46.00
37、 6 355.50 112.75 3.967 30.956 1.8143 26.98 20.24 25.40 46.00 56.00 6 406.50 127.00 4.762 38.100 2.1167 34.92 26.19 31.75 56.00 70.00 6 457.25 123.75 4.762 +0.000 0.058 +0.036 0.000 47.625 2.1167 44.45 33.32 41.28 70.00 85.00 6 508.00 133.25 6.350 53.975 2.1167 50.80 38.10 44.45 NOTE 1A slight overla
38、p is allowed between one range and the next. NOTE 2These tolerances are extracted from BS1916, “Limits and fits for engineering”, Part1, “Limits and tolerances”. BS 3088:1959 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for
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