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1、BRITISH STANDARD BS 2593:1974 Specification for Rotary drill rods and tungsten carbide tipped rotary drill bits Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 This British Standard, having been approved by the Mining and Quarry
2、ing Requisites Industry Standards Committee, was published under the authority of the Executive Board on 31 December 1974 BSI 11-1999 First published March 1955 First revision July 1964 Second revision December 1974 The following BSI references relate to the work on this standard: Committee referenc
3、e MQE/10 Draft for comment 73/44503 DC ISBN 0 580 08347 0 Co-operating organizations The Mining and Quarrying Requisites Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government department and scientific and i
4、ndustrial organizations: Association of Mining Electrical and Mechanical Engineers British Electrical and Allied Manufacturers Association British Steel Industry* Council of Underground Machinery Manufacturers* Department of Trade and Industry Engineering Equipment Users Association Institute of Qua
5、rrying Institution of Mechanical Engineers Institution of Mining Engineers Mechanical Handling Engineers Association National Coal Board* The industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the
6、 preparation of this British Standard: British Compressed Air Society British Quarrying and Slag Federation Ministry of Defence Army Department National Union of Mineworkers Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57
7、:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 BSI 11-1999i Contents Page Co-operating organizationsInside front cover Forewordii Section 1. General 1Scope1 2References1 Section 2. Rotary drill rods 3Form, dimensions and tolerances1 4Material1 5Rod diameters and lengths1 6Workmanship2 7
8、Marking2 8Packaging2 9Requirements for ordering2 Section 3. Tungsten carbide tipped rotary drill bits 10Form, dimensions and tolerances2 11Material2 12Brazing3 13Bit and reamer sizes3 14Marking3 15Packaging3 16Requirements for ordering4 Appendix A Dimensional equivalents10 Table 1 Diamond section ro
9、tary drill rods5 Table 2 Turbine section rotary drill rods6 Table 3 One-piece bit details (up to 60 mm)7 Table 4 Pilot and reamer type bit details8 Table 5 Carbide tips for standard tungsten carbide tipped rotary drill bits (one-piece, and pilot and reamer patterns)9 Publications referred toInside b
10、ack cover Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 ii BSI 11-1999 Foreword This British Standard, prepared under the authority of the Mining and Quarrying Requisites Industry Standards Committee, was designed primarily to
11、 satisfy the relevant needs of the coal industry, and it incorporates essential basic requirements for the degree of quality and interchangeability demanded by the user. Originally published in 1955 and revised in 1964, the standard continues to cover the fundamental aspects of the original standard
12、 and, in addition, takes cognizance of current trends of developing experience, both in manufacture and performance. The relevant properties of materials are now specified for rods, bits and tips; also included are pilot and reamer bits, together with two other types of bit. The shanks of the specif
13、ied drill rods are designed to fit the chuck shown in BS 1090 “Flameproof hand-held electric drilling machines primarily for use in mines”. In this revision the metric dimensions on which the relevant ISO work was based have in general been adopted; however, in order to provide ready cross-reference
14、 at this juncture, the equivalent imperial dimensions have been included and it should be noted that these lie within the limits of the metric dimensions. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their c
15、orrect 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, pages 1 to 10, an inside back cover and a back cover. This standard has been updated (see c
16、opyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 BSI 11-19991 Section 1. General 1 Scope This Briti
17、sh Standard specifies requirements for rotary drill rods and tungsten carbide tipped rotary drill bits. These tools are principally for drilling in coal and other minerals, but are applicable to other materials having appropriate drilling characteristics. 2 References The titles of the British Stand
18、ards referred to in this standard are listed on the inside back cover. Section 2. Rotary drill rods 3 Form, dimensions and tolerances The form, dimensions and tolerances of the rods shall be in accordance with Table 1 or Table 2, except that for rods of 54 mm diameter or larger, the winged portion a
19、djacent to the shank shall be reduced in diameter to 48 mm maximum for a minimum distance of 13 mm to facilitate the maximum possible engagement of the chuck (see Table 2). Although the drill rods illustrated are shown as the hollow type, solid rods which do not have the centre hole shall be deemed
20、to comply with this standard, provided that all other relevant requirements stated herein are met. The rods shall be supplied in a straight condition so that, when laid upon a flat surface and rotated, no point on the line of contact is more than 6 mm above the surface for lengths up to 2 m and pro
21、rata for lengths over 2 m. The eccentricity between shank and rod shall not exceed 0.8 mm. 4 Material Rods shall be supplied from steel having a hardness within the range 220330HB (when tested in accordance with BS 240-1) and which has the following chemical composition: The manufacturer shall provi
22、de a specification of the material if so requested by the purchaser. 5 Rod diameters and lengths The preferred dimensions for the diameters, sections and lengths of rods shall be as follows: The foregoing are the standard preferred sizes, but where agreed between the purchaser and the supplier, rods
23、 of other lengths, provided they satisfy all other relevant requirements specified in this standard, shall be deemed to comply with this standard. Element Per cent Min.Max. Carbon Silicon Manganese Sulphur Phosphorus 0.65 0.10 0.75 0.25 0.40 0.05 0.05 All dimensions are in millimetres Nominal rod di
24、ameter Rod lengths Diamond sectionTurbine section 32 40 48 54 60 67 610, 915, 1 370, 1 524, 1 830 610, 915, 1 220, 1 370, 1 830, 2 435 3 050 610, 915, 1 220, 1 524, 1 830, 2 435 610, 915, 1 370, 1 524, 1 830 610, 915, 1 370, 1 524, 1 830 610, 915, 1 370, 1 524, 1 830 610, 915, 1 370, 1 524, 1 830, 2
25、 130, 2 435 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 2 BSI 11-1999 6 Workmanship The drill rods shall have a fine grain structure, be resistant to impact, and be free from undue surface decarburization, cracks and other d
26、efects. 7 Marking 7.1 Identification marking. Each rod shall be indelibly marked with the manufacturers registered trade name or trademark. 7.2 British Standard marking. Rods may be marked with the number of this standard, i.e. BS 2593. NOTEThe mark BS 2593 on or in relation to a product is a claim
27、by the manufacturer that it complies with the requirements of the standard. 8 Packaging The rods shall be given rust resistant protection and be prepared in bundles each normally not exceeding 255 kg (5 cwt) in weight, using a seamless strapping or other efficient method. 9 Requirements for ordering
28、 The purchaser shall state the following in his enquiry or order. a) The number of this British Standard, i.e. BS 2593. b) Diameter of rod. c) Length of rod. d) Section of rod, i.e. turbine or diamond. e) Solid or hollow rod. Section 3. Tungsten carbide tipped rotary drill bits 10 Form, dimensions a
29、nd tolerances 10.1 Bit body. The form, dimensions and tolerances of the bits shall conform to those shown in Table 3 and Table 4, and the design shall be such that it allows an unrestricted flow of cuttings away from the bit when fitted into the rod. The tolerance on the bit and reamer diameter shal
30、l be + 0.8, 0 mm. 10.2 Tungsten carbide tips. The form, dimensions and tolerances of the tips shall conform to the requirements shown in Table 5. 11 Material 11.1 Bodies. Bit and reamer bodies shall be produced by any suitable method, from one or other of the relevant grades of steels detailed in Pa
31、rt 1, 2 or 3 of BS 970 as appropriate; in the specified condition these components shall have tensile strength of not less than 700 N/mm2. The choice of material supplied shall be at the option of the manufacturer who shall provide a specification if so requested by the purchaser. The hardness shall
32、 be not less than 201 HB and the hardness test, complying with the requirements of BS 240-1, shall be carried out on the driving flats or shank of the bit. 11.2 Tungsten carbide tips. Tips shall consist of tungsten carbide sintered with cobalt and shall normally be supplied to one or other of the fo
33、llowing hardness ranges: Where an extra tough grade is required, the minimum hardness may be reduced to 1 150 HV. Carbide grade Vickers hardness No. (HV) min.max. Hard Medium Tough 1 450 1 350 1 250 1 550 1 450 1 350 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Unc
34、ontrolled Copy, (c) BSI BS 2593:1974 BSI 11-19993 The hardness test shall be carried out on the surface of the tip after removing 0.25 mm to 0.38 mm. The finish of the surface shall be fine enough to give a distinct impression for accurate measurement. The test shall be carried out with a Vickers ha
35、rdness testing machine, or with any equivalent machine which uses a diamond indenter in the form of a square pyramid having an angle between opposite faces of 136; the load shall be at least 295 N. To allow for variations in hardness measurements between different test centres, a range of 25 points
36、HV above or below the specified hardness ranges will be permitted, provided that any grade supplied by a given manufacturer does not have a range of hardness greater than 100 points HV. Tips shall be free from an undue amount of porosity, uncombined carbon and cobalt segregation. Tips shall also be
37、free from eta-phase. The total impurities shall not exceed 1 % and the individual impurities shall not exceed the following: The surfaces of the tips shall be free from pitting. 12 Brazing The tips shall be firmly brazed to the bit body, in accordance with the requirements of BS 1723. 13 Bit and rea
38、mer sizes 13.1 Dimensions. The dimensions of the bits and reamers shall conform to the details given in Table 3 and Table 4. 13.2 Diameter of one piece bits. The following diameters of one piece bits shall be regarded as standard: 13.3 Diameter of pilot and reamer bits. The following diameters of pi
39、lot and reamer bits shall be regarded as standard: 14 Marking 14.1 Identification marking. Each bit shall be indelibly marked with the manufacturers registered trade name or trademark. 14.2 British Standard marking. Bits may be marked with the number of this standard, i.e. BS 2593. NOTEThe mark BS 2
40、593 on or in relation to the product is a claim by the manufacturer that it complies with the requirements of the standard. 15 Packaging The bits shall be protected against damage and corrosion before use. Iron0.5 % Titanium or other carbides (excluding tungsten carbide) 0.25 % Measurements across t
41、he wings mm 35 43 46 52 57 60 PilotReamer mm 64 71 75 mm 35 43 43 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 4 BSI 11-1999 16 Requirements for ordering The purchaser shall state the following in his enquiry or order. a) The
42、 number of this British Standard, i.e. BS 2593. b) The design of the bit, i.e. ordinary, pilot, reamer, or pilot and reamer assembly. c) The diameter of the component or assembly. d) Grade of carbide, or application. e) Rake of the bit. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21
43、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 BSI 11-19995 Table 1 Diamond section rotary drill rods Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 6 BSI 11-1999 Table 2 Turbine section rotary drill rods Licensed Cop
44、y: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 BSI 11-19997 Table 3 One-piece bit details (up to 60 mm) Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 8 BSI 11-1999 T
45、able 4 Pilot and reamer type bit details Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 BSI 11-19999 Table 5 Carbide tips for standard tungsten carbide tipped rotary drill bits (one-piece, and pilot and reamer patterns) NOTEThe
46、 Y dimension on tip fitted to the reamer bar of pilot and reamer bits 71 mm and 75 mm diameter may vary between 4 mm and 5.5 mm. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 10 BSI 11-1999 Appendix A Dimensional equivalents T
47、he following are metric/imperial equivalents additional to those covered by Table 1 to Table 5. mminmmftmft 0.25 0.38 0.8 5.5 13 (12.8) 43 0.010 0.015 1/32 7/32 1/2 1.7 610 915 1 220 1 370 1 524 1 830 2 130 2 435 3 050 2 3 4 4.5 5 6 7 8 10 26.56 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28
48、 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 BSI 11-1999 Publications referred to This standard makes reference to the following British Standards: BS 240, Method for Brinell hardness test Part 1 Testing of metals. BS 970, Wrought steels in the form of blooms, billets, bars and
49、forgings. BS 970-1, Carbon and carbon manganese steels including free cutting steels. BS 970-2, Direct hardening alloy steels, including alloy steels capable of surface hardening by nitriding. BS 970-3, Steels for case hardening. BS 1723, Brazing. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:57:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2593:1974 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards.