1、BRITISH STANDARD BS2593:1974 Specification for Rotary drill rods and tungsten carbide tipped rotary drill bitsBS2593:1974 This British Standard, having been approved by the MiningandQuarrying RequisitesIndustry StandardsCommittee, waspublished under theauthorityofthe ExecutiveBoardon 31December1974
2、BSI11-1999 First published March1955 First revision July1964 Second revision December1974 The following BSI references relate to the work on this standard: Committee reference MQE/10 Draft for comment73/44503 DC ISBN 0 580 08347 0 Co-operating organizations The Mining and Quarrying Requisites Indust
3、ry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government department and scientific and industrial organizations: Association of Mining Electrical and Mechanical Engineers British Electrical and Allied Manufacturers
4、Association British Steel Industry* Council of Underground Machinery Manufacturers* Department of Trade and Industry Engineering Equipment Users Association Institute of Quarrying Institution of Mechanical Engineers Institution of Mining Engineers Mechanical Handling Engineers Association National C
5、oal 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 preparation of this British Standard: British Compressed Air Society British Quarrying and Slag Federation Ministry of Defence
6、 Army Department National Union of Mineworkers Amendments issued since publication Amd. No. Date of issue CommentsBS2593:1974 BSI 11-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii Section 1. General 1 Scope 1 2 References 1 Section 2. Rotary drill rods 3 Form, dimensi
7、ons and tolerances 1 4 Material 1 5 Rod diameters and lengths 1 6 Workmanship 2 7 Marking 2 8 Packaging 2 9 Requirements for ordering 2 Section 3. Tungsten carbide tipped rotary drill bits 10 Form, dimensions and tolerances 2 11 Material 2 12 Brazing 3 13 Bit and reamer sizes 3 14 Marking 3 15 Packa
8、ging 3 16 Requirements for ordering 4 Appendix A Dimensional equivalents 10 Table 1 Diamond section rotary drill rods 5 Table 2 Turbine section rotary drill rods 6 Table 3 One-piece bit details (up to60mm) 7 Table 4 Pilot and reamer type bit details 8 Table 5 Carbide tips for standard tungsten carbi
9、detippedrotarydrillbits (one-piece, and pilot and reamerpatterns) 9 Publications referred to Inside back coverBS2593:1974 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 satisfy
10、 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 in1955 and revised in1964, the standard continues to cover the fundamental aspects of the original standard and, in a
11、ddition, 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 specified drill
12、rods are designed to fit the chuck shown in BS1090 “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 at this ju
13、ncture, 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 correct appl
14、ication. 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 to10, an inside back cover and a back cover. This standard has been updated (see copyright date)
15、and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS2593:1974 BSI 11-1999 1 Section 1. General 1 Scope This British Standard specifies requirements for rotary drill rods and tungsten carbide tipped rotary drill bits. These tools are pri
16、ncipally for drilling in coal and other minerals, but are applicable to other materials having appropriate drilling characteristics. 2 References The titles of the British Standards referred to in this standard are listed on the inside back cover. Section 2. Rotary drill rods 3 Form, dimensions and
17、tolerances The form, dimensions and tolerances of the rods shall be in accordance with Table 1 or Table 2, except that for rods of54mm diameter or larger, the winged portion adjacent to the shank shall be reduced in diameter to48mm maximum for a minimum distance of13mm to facilitate the maximum poss
18、ible 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 to comply with this standard, provided that all other relevant requirements stated herein are met. The rods shall be supplied in
19、a straight condition so that, when laid upon a flat surface and rotated, no point on the line of contact is more than6mm above the surface for lengths up to2 m and pro rata for lengths over2m. The eccentricity between shank and rod shall not exceed0.8mm. 4 Material Rods shall be supplied from steel
20、having a hardness within the range220330HB (when tested in accordance with BS240-1) and which has the following chemical composition: The manufacturer shall provide a specification of the material if so requested by the purchaser. 5 Rod diameters and lengths The preferred dimensions for the diameter
21、s, 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 of other lengths, provided they satisfy all other relevant requirements specified in this standard, shall be deemed to comply with this s
22、tandard. 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 diameter Rod lengths Diamond section Turbine section 32 40 48 54 60 67 610,915,1370,1524,1830 610,915,1220,1370,1830,2435 3050 610,915,1220
23、,1524,1830,2435 610,915,1370,1524,1830 610,915,1370,1524,1830 610,915,1370,1524,1830 610,915,1370,1524,1830,2130,2435BS2593:1974 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 defe
24、cts. 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.BS2593. NOTEThe mark BS2593 on or in relation to a product is a claim by the
25、 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 exceeding255kg(5cwt) in weight, using a seamless strapping or other efficient method. 9 Requirements for ordering The purch
26、aser shall state the following in his enquiry or order. a) The number of this British Standard, i.e.BS2593. 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 and tolerances
27、 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 shall be+0.8,0mm.
28、 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 Part1,2 or3 of BS97
29、0 as appropriate; in the specified condition these components shall have tensile strength of not less than700N/mm 2 . 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 be not less than201H
30、B and the hardness test, complying with the requirements of BS240-1, 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 following hardness ranges:
31、 Where an extra tough grade is required, the minimum hardness may be reduced to1150HV. Carbide grade Vickers hardness No. (HV) min. max. Hard Medium Tough 1450 1350 1250 1550 1450 1350BS2593:1974 BSI 11-1999 3 The hardness test shall be carried out on the surface of the tip after removing0.25mm to0.
32、38mm. 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 hardness testing machine, or with any equivalent machine which uses a diamond indenter in the form of a square pyramid having an angle between opp
33、osite faces of136 ; the load shall be at least295N. To allow for variations in hardness measurements between different test centres, a range of25points 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
34、 hardness greater than100 pointsHV. Tips shall be free from an undue amount of porosity, uncombined carbon and cobalt segregation. Tips shall also be free from eta-phase. The total impurities shall not exceed1% and the individual impurities shall not exceed the following: The surfaces of the tips sh
35、all be free from pitting. 12 Brazing The tips shall be firmly brazed to the bit body, in accordance with the requirements of BS1723. 13 Bit and reamer 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 b
36、its. The following diameters of one piece bits shall be regarded as standard: 13.3 Diameter of pilot and reamer bits. The following diameters of pilot and reamer bits shall be regarded as standard: 14 Marking 14.1 Identification marking. Each bit shall be indelibly marked with the manufacturers regi
37、stered trade name or trademark. 14.2 British Standard marking. Bits may be marked with the number of this standard, i.e.BS2593. NOTEThe mark BS2593 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 p
38、rotected against damage and corrosion before use. Iron 0.5% Titanium or other carbides (excluding tungsten carbide) 0.25% Measurements across the wings mm 35 43 46 52 57 60 Pilot Reamer mm 64 71 75 mm 35 43 43BS2593:1974 4 BSI 11-1999 16 Requirements for ordering The purchaser shall state the follow
39、ing in his enquiry or order. a) The number of this British Standard, i.e.BS2593. 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.BS 2593:1974 BSI 11-1999 5 Table
40、 1 Diamond section rotary drill rods BS 2593:1974 6 BSI 11-1999 Table 2 Turbine section rotary drill rods BS 2593:1974 BSI 11-1999 7 Table 3 One-piece bit details (up to60mm) BS 2593:1974 8 BSI 11-1999 Table 4 Pilot and reamer type bit details BS 2593:1974 BSI 11-1999 9 Table 5 Carbide tips for stan
41、dard tungsten carbide tipped rotary drill bits (one-piece, and pilot and reamer patterns) NOTEThe 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.BS2593:1974 10 BSI 11-1999 Appendix A Dimensional equivalents The following
42、 are metric/imperial equivalents additional to those covered by Table 1 to Table 5. mm in mm ft m ft 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 1220 1370 1524 1830 2130 2435 3050 2 3 4 4.5 5 6 7 8 10 2 6.56BS2593:1974 BSI 11-1999 Publications referred to This standard
43、makes reference to the following British Standards: BS240, Method for Brinell hardness test Part1 Testing of metals. BS970, Wrought steels in the form of blooms, billets, bars and forgings. BS970-1, Carbon and carbon manganese steels including free cutting steels. BS970-2, Direct hardening alloy ste
44、els, including alloy steels capable of surface hardening by nitriding. BS970-3, Steels for case hardening. BS1723, Brazing. BS2593:1974 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents
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