BS 2054-1953 Specification for augers and auger bits《螺旋钻和螺旋钻头规范》.pdf

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1、BRITISH STANDARD BS2054:1953 Incorporating Amendment No. 1 Specification for Augers and auger bitsBS2054:1953 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committee and endorsed by the Chairman ofthe Engineering Divisional Council, was published underthe

2、authority of the General Council on 26 November1953 BSI 12-1999 ISBN 0 580 34149 6 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision this BritishStandard was prepared, consists of representatives from the following Government departments and

3、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 directly represented on the committee entrusted with the preparation of this BritishStandard: Admiralty* High C

4、ommission of India Air Ministry Institute of Marine Engineers Associated Offices Technical Committee Institute of Petroleum Association of Consulting Engineers Institution of Civil Engineers (Incorporated) Institution of Gas Engineers* British Chemical Plant Manufacturers Institution of Heating and

5、Ventilating Association Engineers British Compressed Air Society Institution of Mechanical Engineers British Electrical and Allied Manufacturers Institution of Mechanical Engineers Association (Automobile Division) British Electricity Authority and Area Boards Institution of Production Engineers* Br

6、itish Engineers Association* Locomotive Manufacturers Association* British Internal Combustion Engine Machine Tool Trades Association Manufacturers Association Ministry of Fuel and Power British Iron and Steel Federation Ministry of Labour and National Service British Railways The British Transport

7、(Factory Department) Commission* Ministry of Supply* Crown Agents for the Colonies Ministry of Transport* D.S.I.R. Mechanical Engineering Research Ministry of Works Organization National Physical Laboratory Engineering Equipment Users Association* Radio Industry Council Gas Council* War Office Assoc

8、iation of U.K. Plier Manufacturers Light Edge Tool and Allied Trades Association Edge Tool Manufacturers Association London Transport Executive Engineers and Allied Hand Tool Makers National Association of Tool Dealers Association National Coal Board English Joinery Manufacturers Association Nationa

9、l Federation of Building Trades Federation of BritishHand Tool Employers Manufacturers National Union of Furniture Trade Operatives Furniture Development Council Saw Trades Association General Post Office Society of British Aircraft Constructors Incorporated British Institute of Certified Society of

10、 Motor Manufacturers and Carpenters Traders Ltd. Institution of Engineering Inspection Co-opted manufacturers J.E.S.C. Sub-Committee on Hand Tools Amendments issued since publication Amd. No. Date of issue Comments 4011 December 1960 Indicated by a sideline in the marginBS2054:1953 BSI 12-1999 i Con

11、tents Page Co-operating organizations Inside front cover Foreword ii Section 1. General 1 Scope 1 2 Nomenclature 1 Section 2. Manufacture 3 Material 1 a) Augers and auger bits 1 b) Auger eyes 1 c) Handles 1 4 Heat treatment and hardness 1 5 Accuracy 1 6 Auger handles 1 a) Quality of wood 1 b) Moistu

12、re content 1 c) Dimensions 1 7 Finish 2 a) Augers 2 b) Auger bits 2 c) Handles 2 d) General 2 8 Dimensions 2 a) General dimensions 2 b) Tangs 2 c) Screw lead 2 9 Marking 2 10 Soundness and performance tests 2 a) Twisting test on augers 2 b) Performance tests on augers and auger bits 2 Appendix Accur

13、acy of auger bit in brace 15 Figure 1 Nomenclature of augers and auger bits 3 Figure 2 Scotch pattern eyed auger round shank 4 Figure 3 Solid centre auger bit 6 Figure 4 Scotch pattern auger bit 8 Figure 5 Jennings pattern auger bit 10 Figure 6 Auger handles 12 Figure 7 Sectional view of bit brace c

14、huck with auger bit in position showing annular clearance 14 Table 1 Scotch pattern eyed augers: round shanks 5 Table 2 Solid centre auger bit(Jennings pattern nose) 7 Table 3 Scotch pattern auger bit 9 Table 4 Jennings pattern auger bit 11 Table 5 Auger handles 13BS2054:1953 ii BSI 12-1999 Foreword

15、 This standard makes reference to the following BritishStandards: BS309, Whiteheart malleable iron castings. BS427, Tables of diamond pyramid hardness numbers. BS860, Table of approximate comparison of hardness scales. BS970, Wrought steels. BS1978, Bit braces. This British Standard has been prepare

16、d under the authority of the Mechanical Engineering Industry Standards Committee and forms one of a series relating to the most commonly used hand tools. As in related standards, the tools included are those intended for the use of craftsmen, amongst the provisions being the analysis of the steel us

17、ed for their manufacture. The quality and soundness of manufacture of the tools are also further ensured by the clauses on heat treatment, hardness, finish and accuracy. Tables of nominal sizes and dimensions relate to one type of auger and three types of auger bit and the standard is completed by t

18、he tests of soundness and performance. As auger bits are required to function in bit braces, the diameter of the shanks and dimensions of the square taper tangs have been correlated with the design and dimensions of the chucks of bit braces as provided in BS1978 1) , thus ensuring that the auger bit

19、s will be gripped, turned and released by the chucks in a satisfactory manner. It is emphasized that the tools dealt with in this standard are those required by craftsmen for general purposes, for which reason those designed for special application, such as auger bits for dowelling, have not been in

20、cluded. 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. Summary of pages This document co

21、mprises a front cover, an inside front cover, pagesi andii, pages1 to16, an inside 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 the inside front cover. 1) BS1978, “Bit brace

22、s.”BS2054:1953 BSI 12-1999 1 Section 1. General 1 Scope This British Standard gives the nominal sizes and dimensions of the following types of auger and auger bit: Scotch pattern eyed auger, with round shank. Solid centre auger bit(Jennings pattern nose). Scotch pattern auger bit. Jennings pattern a

23、uger bit. The nomenclature used is defined on an annotated drawing. Provisions are given relating to steel analysis, heat treatment, hardness, finish, accuracy, soundness and performance tests. 2 Nomenclature For the purposes of this BritishStandard the terms used for augers and auger bits shall be

24、those shown on Figure 1. Section 2. Manufacture 3 Material a) Augers and auger bits. Augers and auger bits(with the exception of the auger eyes) to which this BritishStandard relates shall be manufactured from steel having the following analysis: b) Auger eyes. The eyes of the augers shall be manufa

25、ctured from any one of the following materials: Wrought iron Mild steel to any suitable mild steel specification in BS970. 2) Whiteheart malleable iron to BS309. 3) c) Handles. Auger handles shall be manufactured from ash. 4 Heat treatment and hardness The twist and the cutting edge of augers and au

26、ger bits shall be hardened and tempered to produce a hardness reading within the range450/520 on the diamond pyramid scale, 4)using a load of10kg., except that the hardness reading at the commencement of the twist adjacent to the shank shall be within the range360/420 on the same scale using a simil

27、ar load. Alternatively, equivalent figures on other approved hardness scales may be used. 5) 5 Accuracy a) The screw lead shall lie in the centre of the cutting edges which shall cut equally and simultaneously. b) The nose, the twist, the round shank and, in the case of auger bits, the tang, shall b

28、e concentric with the axis of the tool. The concentricity accuracy of auger bits shall be such that when the bit is gripped in the chuck of a bit brace, which complies with the provisions of BS1978, 6)there shall be an annular clearance between the end of the jaws at the outer end of the shell and t

29、he round shank of the auger bit (seeAppendix). When the bit brace is turned the bit shall rotate concentrically with the axis of the chuck. 6 Auger handles a) Quality of wood. The timber from which handles are manufactured shall be straight grained and free from defects. b) Moisture content. The moi

30、sture content of the timber from which handles are manufactured, asdetermined by any suitable process, shall be not less than ten per cent and not more thanfifteenper cent. c) Dimensions. The dimensions of the handles shall be those given in Table 5. Percentages Carbon Not less than0.60 and not more

31、than0.75 Silicon Not less than0.1 and not morethan0.30 Sulphur Not more than0.045 Phosphorus Not more than0.045 Manganese Not less than0.25 and not morethan0.65 2) BS970, “Wrought steels.” 3) BS309, “Whiteheart malleable iron castings.” 4) BS427, “Tables of diamond pyramid hardness numbers.” 5) BS86

32、0, “Table of approximate comparison of hardness scales.” 6) BS1978, “Bit braces.”BS2054:1953 2 BSI 12-1999 7 Finish a) Augers. The nose shall be cleanly finished. Nominal sizes up to and including1in. shall be bright through nose and nominal sizes above1in. shall be left black through nose. The comp

33、lete twist and2in. of the shank adjacent to the twist shall be ground and glazed while the rest of the tool shall be smooth and painted. b) Auger bits. The nose shall be cleanly finished and all sizes shall be bright through nose. The complete twist and shank shall be ground and glazed but the tang

34、shall be left as forged. c) Handles. Handles for use with augers shall be smoothly finished. d) General. Augers and auger bits shall be supplied sharpened and ready for use. 8 Dimensions a) General dimensions. The range of nominal sizes and the general dimensions of augers and auger bits(with the ex

35、ception of the tang) to which this BritishStandard relates shall be those given in Table 1 to Table 4 inclusive. b) Tangs. The nominal dimensions of the tangs of auger bits shall be those given below: i) Bits with shank diameter under 3 / 8 in. The tang shall be 3 / 8 in. square tapering to 3 / 16 i

36、n. square, with a length of1 1 / 4 in. ii) Bits with shank diameter of 3 / 8 in. and larger. The tang shall be 13 / 32 in. square tapering to 13 / 64 in. square, with a length of1 1 / 4 in. iii) Angle. The nominal included angle of the taper shall be9degrees. c) Screw lead. The screw leads of augers

37、 and auger bits shall have a single or double start thread according to the provisions of Table 1 to Table 4 inclusive and the number of threads per inch shall be those given in Table 1 to Table 4 inclusive, but alternative threads may be provided by arrangement between the purchaser and the manufac

38、turer. 9 Marking The augers and auger bits shall be suitably marked, on the shank or tang, with the nominal size. 10 Soundness and performance tests Augers and auger bits complying with the provisions of this BritishStandard shall be capable of passing the tests detailed below appropriate to their t

39、ype. The shock test and twisting test are designed each to ensure the soundness of the weld between the eye and the auger shank. The performance test ensures satisfactory boring properties. a) Soundness of weld test on augers. The weld shall be completely sound upon completion of either of the follo

40、wing tests: i) Shock test. With the twist of the auger held securely in the hand above a solid steel block supported on a bench or table, the auger shall be raised to a height of18in to24in above the upper face of the block and brought down quickly to cause the auger weld to strike a sharp blow agai

41、nst the upper face of the block. This blow shall be repeated three times consecutively. ii) Twisting test. With the shank of the auger securely and positively gripped adjacent to the twist in a vice or other suitable fixture, a steel bar having a length equal to that of the appropriate handle and a

42、diameter 1 / 16 in smaller than the bore of the auger eye shall be disposed centrally in the auger eye and used to subject the auger shank to the maximum torque that can be applied manually. The torque shall act normally about the axis of the auger and the angle through which the shank is twisted sh

43、all in no case exceed30 b) Performance tests on augers and auger bits. i) The tool shall bore satisfactorily across the grain to a minimum depth of75 per cent of the length of its twist, into a piece of sound oak or similar hardwood of suitable dimensions. The tool shall not be withdrawn during the

44、test. ii) When the bore reaches the depth given inb)i) overleaf, the tool shall withdraw easily. iii) In addition to the hardwood boring test described in b)i) andii), auger bits with a Jennings pattern nose shall bore cleanly and smoothly through soft wood. Following these tests the augers and auge

45、r bits shall show no sign of damage, fracture or flaws.BS 2054:1953 BSI 12-1999 3 Figure 1 Nomenclature of augers and auger bitsBS 2054:1953 4 BSI 12-1999 Figure 2 Scotch pattern eyed auger round shankBS2054:1953 BSI 12-1999 5 Table 1 Dimensions of scotch pattern eyed augers: round shanks Alphabetic

46、al references to Figure 2 A.Nominal size. B.Length of twist excluding screw lead. C.Sectional thickness of twist. D.Number of half turns per foot in the twist. E.Outside diameter of twist. F.Overall length of auger. G.Diameter of shank. H.Screw lead(t.p.i.). J.Bore diameter of eye. K.Width of eye. A

47、ll dimensions are in inches and are nominal unless otherwise stated. A + 1 / 32 0 B C D E F G Max. H t.p.i. single start J + 0 1 / 32 K 1 / 4 5 1 / 2 5 / 64 32 7 / 32 21 1 / 4 14 5 / 8 15 / 16 5 / 16 5 1 / 2 3 / 32 30 1 / 4 21 1 / 4 14 5 / 8 15 / 16 3 / 8 5 3 / 4 7 / 64 24 5 / 16 22 5 / 16 12 5 / 8

48、15 / 16 7 / 16 6 7 / 64 21 3 / 8 22 3 / 8 12 3 / 4 1 1 / 8 1 / 2 6 1 / 8 18 7 / 16 23 3 / 8 10 3 / 4 1 1 / 8 9 / 16 6 1 / 4 1 / 8 18 1 / 2 24 13 / 32 8 3 / 4 1 1 / 8 5 / 8 6 1 / 2 1 / 8 15 9 / 16 24 13 / 32 8 7 / 8 1 1 / 4 11 / 16 6 1 / 2 9 / 64 15 5 / 8 24 7 / 16 8 7 / 8 1 1 / 4 3 / 4 6 1 / 2 5 / 3

49、2 15 11 / 16 24 7 / 16 8 7 / 8 1 1 / 4 13 / 16 6 3 / 4 5 / 32 14 3 / 4 24 7 / 16 8 7 / 8 1 1 / 4 7 / 8 7 11 / 64 12 13 / 16 24 15 / 32 8 7 / 8 1 1 / 4 1 7 1 / 2 3 / 16 11 7 / 8 24 1 / 2 8 1 1 5 / 16 1 1 / 8 7 1 / 2 13 / 64 10 31 / 32 26 9 / 16 8 1 1 5 / 16 1 1 / 4 7 3 / 4 7 / 32 9 1 3 / 32 26 9 / 16 8 1 1 / 16 1 5 / 8 1 3 / 8 8 1 / 4 8 1 7 / 32 26 5 / 8 8 1 1 / 16 1 5 / 8 1 1 / 2 8 1 / 4 8 1 11 / 32 26 5 / 8 8 1 1 / 16 1 5 / 8 1 3 / 4 8 1 / 2 17 / 64 6 1 9 / 16 28 11 / 16 8 1 1 / 8 1 3 / 4 2 9 9 / 32 6 1 25 / 32 28 3 /