1、BRITISH STANDARD BS 3066:1995 Specification for Engineers cold chisels and allied tools UDC 621.911.3BS3066:1995 This British Standard, having been prepared under the directionof the Machine Engineers and Hand Tools Standards Policy Committee, waspublished under the authorityof the Standards Boardan
2、d comes into effect on 15 January 1995 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference MTE/15 Draft for comment 93/702684 DC ISBN 0 580 22876 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by
3、 the Machine Engineers and Hand Tools Standards Policy Committee (MTE/-) to Technical Committee MTE/15, upon which the following bodies were represented: British Coal Corporation British Telecommunications plc Consumer Policy Committee of BSI Federation of British Hand Tool Manufacturers Handle Manu
4、facturers Association Institute of Carpenters Ministry of Defence The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Steel Industry Coopted members Amendments issued since publication Amd. No. Date CommentsBS3066:1995 BSI 08-1999 i C
5、ontents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Material 1 4 Types and dimensions 2 5 Heat treatment and hardness 2 6 Finish 3 7 Marking 3 8 Tests 3 Annex A (informative) Guidance on the safe use of chisels and allied tools 16 Annex B (normative) Tests 1
6、8 Figure 1 Flat cold chisels 4 Figure 2 Cross-cut cold chisels 5 Figure 3 Half round-nose cold chisels 6 Figure 4 Diamond-point cold chisels 7 Figure 5 Brick bolsters 8 Figure 6 Floorboard chisels 9 Figure 7 Plain and fluted plugging chisels 10 Figure 8 Concrete or moil points 11 Figure 9 Parallel p
7、in punches 12 Figure 10 Taper punches 13 Figure 11 Centre punches 14 Figure 12 Typical hand guards 15 Table 1 Material specification for carbon steel tools 1 Table 2 Nominal dimensions of flat cold chisels 4 Table 3 Nominal dimensions of cross-cut cold chisels 5 Table 4 Nominal dimensions of half ro
8、und-nose cold chisels 6 Table 5 Nominal dimensions of diamond-point cold chisels 7 Table 6 Nominal dimensions of brick bolsters 8 Table 7 Nominal dimensions of floorboard chisels 9 Table 8 Nominal dimensions of plain and fluted plugging chisels 10 Table 9 Nominal dimensions of concrete or moil point
9、s 11 Table 10 Nominal dimensions of parallel pin punches 12 Table 11 Nominal dimensions of taper punches (including nail and reaper punches) 13 Table 12 Nominal dimensions of centre punches 14 Table 13 Hardness levels for chisels, bolsters and concrete points 14 Table 14 Hardness levels for punches
10、14 Table 15 Hardness zone at the cutting edge for chisels, bolsters and concrete points 15 List of references Inside back coverBS3066:1995 ii BSI 08-1999 Foreword This British Standard has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee, and supe
11、rsedes BS3066:1981 which is withdrawn. Matters concerning safety cannot be too strongly emphasized and it is a prime requirement that a safe tool should be offered to the user. Since publication of the original specification, the design of chisels and manufacturing techniques employed have continued
12、 to improve. It is not the intention of this standard to impose restrictions on the types of materials from which chisels may be manufactured, and so inhibit development in this direction, but greater importance is placed on tests and testing procedures. It should be recognized that cold chisels and
13、 allied tools are prone to work hardening and that the hardness values quoted in Table 13 to Table 15 apply only at the time of manufacture. In so far as the user is concerned, reports on accidents continue to indicate that such accidents occur as a result of abnormal usage and failure to maintain t
14、ools in a safe condition. A responsibility is therefore placed on the users, in their own interests, to ensure that their tools are properly maintained. A leaflet on safety recommendations is available from manufacturers. An extract is reproduced asAnnex A. Fitted hand guards are available on select
15、ed chisels and allied tools, as optional extras. 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 oblig
16、ations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 18, 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 t
17、heinside front cover.BS3066:1995 BSI 08-1999 1 1 Scope This British Standard specifies the nominal sizes, dimensions, quality, finish and testing of engineers cold chisels and allied tools for hand use as follows: flat chisels; cross-cut chisels; half-round nose chisels; diamond-point chisels; brick
18、 bolsters; floorboard chisels; plugging chisels; concrete or moil points; parallel pin punches; taper punches (including nail and reaper punches); centre punches. 2 References 2.1 Normative references This British Standard incorporates, by dated or undated reference, provisions from other publicatio
19、ns. These normative references are made at the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to this British Standard only w
20、hen incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 2.2 Informative references This British Standard refer to other publications that provide information or guidance. Editions of these
21、publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 3 Material Chisels and allied tools shall be manufactured from carbon or alloy steels. Carbon steel tools shall be manufactured in accordance with the
22、requirements ofTable 1. In alloy steel tools, sulfur, phosphorus and residual elements shall comply with the requirements of BS970-2:1988, except that the main alloying element shall be not less than0.9%(m/m). Chisels and allied tools shall not be manufactured from free cutting or semi-free cutting
23、steel. Hand grips shall be manufactured from high impact plastics material, natural rubber 70 hardness or from other suitable material capable of meeting the requirements of clause8. Table 1 Material specification for carbon steel tools Element Minimum Maximum % (m/m) % (m/m) Carbon 0.50 0.75 Mangan
24、ese 0.50 0.90 Sulfur 0.05 Phosphorus 0.05 Silicon 0.40BS3066:1995 2 BSI 08-1999 4 Types and dimensions 4.1 Types Cold chisels and allied tools shall be manufactured in either octagonal, hexagonal, square, round or oval sections. Round sections may be knurled if required. Head types shall be of those
25、 shown inFigure 1 toFigure 11. Tools of body section below13mm shall have chamfered type head. Tools of 13 mm body section and above shall have either a domed anti-mushroom type head or a conical head. The conical head dimensions shall be as stated inTable 2toTable 9andTable 11toTable 12. NOTEIt is
26、permissible for tools of 13 mm body section to have a chamfered head. Illustrations of typical hand guards are shown inFigure 12. 4.2 Dimensions 4.2.1 Dimensions, other than length, shall be in accordance with the Table 2toTable 12. Unless otherwise agreed between the purchaser and the manufacturer,
27、 lengths of chisels and allied tools shall be as stated inTable 2 toTable 12. Unless otherwise agreed between the purchaser and manufacturer, tolerances shall be in accordance with BS4114:1967. 4.2.2 The designating size of chisels and bolsters shall be the nominal width of the cutting edge, and len
28、gth where appropriate. 4.2.3 Concrete or moil points shall be designated by length and section (seeTable 9). 4.2.4 For oval section steels the body section dimensions referred to inTable 2 toTable 9 are major axis dimensions. The minor axis shall be not less than half the major axis. 4.2.5 Punches s
29、hall be designated by the point diameter. 4.2.6 Hand guards shall be so dimensioned that they are a tight fit on the tool shaft and provide protection to the users hand from misdirected hammer blows. They shall be designed to provide a comfortable grip. 5 Heat treatment and hardness 5.1 General Both
30、 plain carbon and alloy steel tools shall be through-hardened, followed by tempering or stress relieving, to achieve the hardness values given in Table 13 andTable 14 when tested in accordance with8.1. 5.2 Hardness zone at the cutting edge/tool points 5.2.1 Chisels and bolsters The tool blade shall
31、be heat treated to give readings within the hardness range specified inTable 13 over the appropriate minimum distance from the extreme cutting end as given inTable 15. 5.2.2 Concrete points The hardness zone for concrete or moil points shall be calculated on the body section (seeTable 9) substituted
32、 for the cutting edge size inTable 15. 5.2.3 Punches The blade shall be heat treated to give readings within the range specified inTable 14 and the hardened zone shall extend from the tool point (working end) to a minimum point5mm into the body section. 5.3 Hardness zone at the head 5.3.1 Chisels, b
33、olsters and concrete points The tool head shall give readings within the maximum Figure specified in Table 13 over a minimum distance of25mm from the extreme end of the head. 5.3.2 Punches The tool head shall give readings within the maximum Figure specified in Table 14 over a minimum distance of20m
34、m from the extreme end of the head.BS3066:1995 BSI 08-1999 3 6 Finish The tools shall be supplied with an effective coating of corrosion inhibitor and shall be free from flaws, seams and any other deleterious defects. The cutting edges/tool points shall be ground and free from burrs. The blade shall
35、 be free from roughness and excessive oxide scale. The body shall be free from excessive oxide scale. 7 Marking The following shall be legibly stamped or embossed on the body of the tool: a) manufacturers name or trademark; b) if alloy, the word “alloy”; c) where space permits the number of this Bri
36、tish Standard, i.e. BS3066:1995; d) where space permits, a warning advising the user to wear safety glasses, e.g. “wear safety glasses”. 8 Tests 8.1 General Cold chisels and allied tools shall be capable of passing the tests in8.2 to8.4 and, where applicable,8.5. 8.2 Hardness When tested in accordan
37、ce with BS891:1989, chisels and tools shall comply with the requirements specified inclause5. NOTEHardness testing in accordance with BS427:1990 is permissible 1) . 8.3 Crack test When tested by using one of the methods described in BS6072:1981, there shall be no cracks. 8.4 Impact test When tested
38、in accordance with B.1, visual examination of the tool shall reveal no defects, damage to the cutting edge or “mushrooming” of the head. 8.5 Hand guards When tested in accordance withB.2 there shall be no breakage or distortion of the guard. The guard shall be resistant to damage from commonly used
39、oils and chemicals. 1) A conversion chart for HRC to HV is given in BS 860:1967.BS3066:1995 4 BSI 08-1999 Table 2 Nominal dimensions of flat cold chisels (seeFigure 1) Figure 1 Flat cold chisels Designating size Body section across flats or diameter C Blade thickness D Length of blade E Length of co
40、nical head F Overall lengthA 5.0 Width of Cut B 0.5 min. max. min. max. mm mm mm mm mm mm mm mm 100 150 6 5.5 to 6 1.2 28 31 Chamfered 100 125 150 200 10 8.0 to 10 1.5 35 38 Chamfered 150 200 250 13 10.0 to 13 2.4 50 56 Chamfered 175 200 250 300 450 16 13.0 to 16 2.8 56 63 10 13 200 225 250 300 350
41、450 600 19 16.0 to 19 3.0 69 75 13 16 225 250 300 450 600 22 19.0 to 22 3.0 75 88 13 19 225 250 300 450 600 25 22.0 to 25 4.0 88 100 13 19BS3066:1995 BSI 08-1999 5 Table 3 Nominal dimensions of cross-cut cold chisels (seeFigure 2) Figure 2 Cross-cut cold chisels Designating size Body section across
42、flats or diameter C Blade thickness D Length of blade E Length of conical head F Blade depth G Blade root thickness H Overall length A 5.0 Width of Cut B 0.5 min. max. min. max. mm mm mm mm mm mm mm mm mm mm 100 3 6 1.5 35 38 Chamfered 10 2.4 125 5 10 1.5 53 56 Chamfered 14 3.6 150 6 13 2.5 72 75 Ch
43、amfered 19 5.0 175 8 16 3.0 75 78 10 13 22 6.0 200 10 19 4.0 78 81 10 13 25 8.0 225 11 22 5.0 85 88 10 16 28 9.0 225 13 22 5.0 85 88 10 16 28 11.0 250 16 25 6.0 88 100 13 19 31 14.0BS3066:1995 6 BSI 08-1999 Table 4 Nominal dimensions of half round-nose cold chisels (seeFigure 3) Figure 3 Half round-
44、nose cold chisels Designating size Body section across flats or diameter C Blade thickness D Length of blade E Length of conical head F Overall length A 5.0 Width of CutB 0.5 min. max. min. max. mm mm mm mm mm mm mm mm 100 3 6 4.0 35 38 Chamfered 125 5 10 5.5 44 47 Chamfered 150 6 13 7.0 53 56 Chamf
45、ered 175 8 16 10.0 56 60 10 13 200 10 19 11.0 60 63 10 13 225 11 22 13.0 63 69 10 16 225 13 22 14.0 69 75 10 16 250 16 25 17.0 69 75 13 19BS3066:1995 BSI 08-1999 7 Table 5 Nominal dimensions of diamond-point cold chisels (seeFigure 4) Figure 4 Diamond-point cold chisels Designating size Body section
46、 across flats or diameter C Blade thickness D Length of blade E Length of conical head F Overall length A 5.0 Width of Cut B 0.5 min. max. min. max. mm mm mm mm mm mm mm mm 100 3 6 4.0 35 38 Chamfered 125 5 10 5.5 44 47 Chamfered 150 6 13 7.0 53 56 Chamfered 175 8 16 10.0 56 60 10 13 200 10 19 11.0
47、60 63 10 13 225 11 22 13.0 63 69 10 16 225 13 22 14.0 69 75 10 16 250 16 25 17.0 69 75 13 19BS3066:1995 8 BSI 08-1999 Table 6 Nominal dimensions of brick bolsters (seeFigure 5) NOTEBlade thickness D has been omitted from Table 6 because of variation in methods of manufacture and design. Figure 5 Bri
48、ck bolsters Designating size Body section across flats or diameter C Length of blade E Length of conical head F Overall lengthA Width of Cut B 1.0 min. max. min. max. min. max. mm mm mm mm mm mm mm mm 200 250 50 19 to 22 85 100 10 16 200 250 65 19 to 22 85 100 10 16 200 250 75 19 to 22 85 100 10 16
49、200 250 88 19 to 22 85 100 10 16 200 250 100 19 to 25 85 100 10 19 200 250 113 19 to 25 85 100 10 19BS3066:1995 BSI 08-1999 9 Table 7 Nominal dimensions of floorboard chisels (seeFigure 6) NOTEBlade thickness D has been omitted from Table 7 because of variation in methods of manufacture and design. Figure 6 Floorboard chisels Designating size Body section across flats or diameter C Length of blade E Length of conical head F Overall length A
