1、BRITISH STANDARD BS 328-4: 1983 Drills and reamers Part 4: Specification for dimensions of reamers UDC 621.951.7+621.952.5BS328-4:1983 This British Standard, having been prepared under the directionof the Mechanical Engineering Standards Committee, was published underthe authority of the BoardofBSI
2、and comes intoeffecton 30December1983 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference MEE/73 Draft for comment78/75479 DC ISBN 0 580 13419 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted by th
3、e Mechanical Engineering Standards Committee (MEE/-) to Technical Committee MEE/73 upon which the following bodies were represented: Gauge and Tool Makers Association Institution of Production Engineers Machine Tool Industry Research Association Society of British Aerospace Companies Limited Twist D
4、rill and Reamer Association Amendments issued since publication Amd. No. Date of issue CommentsBS328-4:1983 BSI 01-2000 i Contents Page Committees responsible Inside front cover Foreword iv 1 Scope 1 2 Nomenclature 1 3 Terms and definitions 1 4 General dimensions 7 5 Cutting dimensions 8 6 Hand ream
5、ers 8 7 Long-flute machine reamers 10 8 Machine chucking reamers with Morse taper shanks 10 9 Machine chucking reamers with parallel shanks 12 10 Shell reamers and their arbors 14 11 Parallel shank hand socket reamers for Morse and5% metric tapers 16 12 Taper shank machine socket reamers for Morse a
6、nd5% metric tapers 17 13 Hand taper pin reamers (taper1 in50) 19 14 Machine taper pin reamers (taper1 in50) 19 15 Machine bridge reamers with Morse taper shanks 22 Appendix A Tolerances for special reamers 24 Appendix B Related tolerances extracted from BS4500-1 25 Appendix C Reamers with fractional
7、 (inch) cutting diameters 26 Appendix D Tables of dimensions set out as functions of reamer diameter 35 Figure 1 Principal elements of reamers 2 Figure 2 Entering end of reamers 3 Figure 3 Transverse section of reamer 4 Figure 4 Bevel lead and taper lead 4 Figure 5 Undercut and overcut faces 5 Figur
8、e 6 Lead normal clearances 5 Figure 7 Taper reamer 6 Figure 8 Morse taper shank machine bridge reamer 6 Figure 9 Shell reamer with taper bore 6 Figure 10 Hand reamer 10 Figure 11 Hand reamer with long taper lead 10 Figure 12 Long-flute machine reamer 11 Figure 13 Machine chucking reamer with Morse t
9、aper shank 12 Figure 14 Machine chucking reamers with parallel shanks 13 Figure 15 Shell reamer with taper bore 14 Figure 16 Arbor for shell reamer with taper bore 16 Figure 17 Parallel shank hand socket finishing reamer with straight flutes 17 Figure 18 Parallel shank hand socket finishing reamer w
10、ith spiral flutes 17 Figure 19 Taper shank machine socket roughing reamer with spiral flutes 17 Figure 20 Taper shank machine socket finishing reamer with straight flutes 19BS328-4:1983 ii BSI 01-2000 Page Figure 21 Taper shank machine socket finishing reamer with spiral flutes 19 Figure 22 Hand tap
11、er pin reamer (taper1:50) 20 Figure 23 Machine taper pin reamer with parallel shank 21 Figure 24 Machine taper pin reamer with Morse taper shank 21 Figure 25 Machine bridge reamer with Morse taper shank and straight flutes 23 Figure 26 Machine bridge reamer with Morse taper shank and helical flutes
12、23 Figure 27 Graphical representation of the calculation of tolerances for special reamers 24 Figure 28 Hand reamer 26 Figure 29 Long-flute machine reamer 26 Figure 30 Machine chucking reamer with Morse taper shank 28 Figure 31 Machine chucking reamers with parallel shanks 29 Figure 32 Shell reamer
13、with taper bore (inch series) 30 Figure 33 Arbor for shell reamer with taper bore (inch series) 32 Figure 34 Hand taper pin reamer (inch series, taper1 in48) 32 Figure 35 Machine taper pin reamer with Morse taper shank (inch series, taper1 in48) 34 Figure 36 Hand reamer 35 Figure 37 Long-flute machi
14、ne reamer 35 Figure 38 Machine chucking reamer with Morse taper shank 37 Figure 39 Machine chucking reamers with parallel shanks 39 Figure 40 Machine bridge reamer with Morse taper shank and helical flutes 41 Table 1 Tolerances on lengths 8 Table 2 Hand reamers. Preferred diameters and related dimen
15、sions 9 Table 3 Long-flute machine reamers. Preferred diameters and related dimensions 11 Table 4 Machine chucking reamers with Morse taper shanks. Preferred diameters and related dimensions 12 Table 5 Machine chucking reamers with parallel shanks. Preferred diameters and related dimensions 13 Table
16、 6 Shell reamers with taper bore. Preferred diameters and related dimensions 15 Table 7 Arbors for shell reamers with taper bore. Dimensions 16 Table 8 Parallel shank hand socket reamers for Morse and5% metric tapers 18 Table 9 Taper shank machine socket reamers for Morse and5% metric tapers 18 Tabl
17、e 10 Hand taper pin reamers. Dimensions 20 Table 11 Machine taper pin reamers with parallel shanks. Dimensions 22 Table 12 Machine taper pin reamers with Morse taper shanks. Dimensions 22 Table 13 Machine bridge reamers. Preferred diameters and related dimensions 23 Table 14 Limits of tolerance f8 2
18、5 Table 15 Limits of tolerance h9 25 Table 16 Limits of tolerance h11 25BS328-4:1983 BSI 01-2000 iii Page Table 17 Limits of tolerance h12 25 Table 18 Limits of tolerance k11 25 Table 19 Limits of tolerance m6 25 Table 20 Limits of tolerance H13 26 Table 21 Hand reamers (inch series). Preferred diam
19、eters and related dimensions 27 Table 22 Long-flute machine reamers with Morse taper shanks (inch series). Preferred diameters and related dimensions 28 Table 23 Machine chucking reamers with Morse taper shanks (inch series). Preferred diameters and related dimensions 29 Table 24 Machine chucking re
20、amers with parallel shanks (inch series). Preferred diameters and related dimensions 30 Table 25 Shell reamers with taper bore (inch series). Preferred diameters and related dimensions 31 Table 26 Arbors for shell reamers with taper bore (inch series). Dimensions 32 Table 27 Hand taper pin reamers (
21、inch series, taper1 in48). Dimensions 33 Table 28 Machine taper pin reamers with Morse taper shanks (inch series, taper1 in48). Dimensions 34 Table 29 Hand reamers. General table 36 Table 30 Long-flute machine reamers. General table 37 Table 31 Machine chucking reamers with Morse taper shanks. Gener
22、al table 38 Table 32 Machine chucking reamers with parallel shanks. General table 40 Table 33 Machine bridge reamers. General table 41 Publications referred to Inside back coverBS328-4:1983 iv BSI 01-2000 Foreword This revision of this British Standard has been prepared under the direction of the Me
23、chanical Engineering Standards Committee. The standard for milling cutters and reamers was first published in1920, and subsequent editions were issued in1931 and1938. When it was again revised, in1952, the standard was separated into two Parts, Part1 relating to milling cutters and Part2 to reamers,
24、 countersinks and counterbores. A further revision was carried out in1964 to take account of the work of the International Organization for Standardization (ISO), in which agreement had been reached on hand reamers, long flute machine reamers and chucking reamers in both inch and metric units. This
25、revision has been prepared to take account of further ISO work that has been completed since1964 and is primarily in metric units, the intention being eventually to phase out reamers made to inch dimensions. However, it is recognized that reamers with cutting diameters in inch units will be required
26、 for some time to come. Where practicable, therefore, preferred inch sizes for cutting diameters are retained (seeAppendix C). Nevertheless, in the interests of rationalization, all other dimensions are in metric measurement, allowing the same blanks to be used for both inch and metric cutting reame
27、rs. This general principle applies to the more popular types, viz. hand, long-flute machine and machine chucking reamers. It cannot however be applied in the case of inch shell reamers (where the taper of the bore is different) or to inch hand or inch machine taper pin reamers (where the taper of th
28、e reamer is different). In these cases the existing inch dimensions from the tables in BS122-2:1964 have been retained (seeAppendix C). Machine jig reamers, parallel shank and Morse taper shank socket reamers for Brown and Sharpe tapers, parallel bridge reamers and centre reamers have been omitted f
29、rom the standard since there is now virtually no demand for them. Four-flute shell drills with taper bore have also been omitted. Whereas the British Standard on reamers, counterbores and countersinks has previously been published as a Part of BS122 “Milling cutters”, there is not now considered to
30、be any great affinity between these areas of work. This revision is published as a Part of BS328 “Drills and reamers”, the other Parts being: Part 1: Twist drills; Part 2: Centre drills; Part 3: Core drills; Part 5: Countersinks and counterbores. The1983 revision of Part5 of BS328 superseded clauses
31、21, 22 and23 of BS122-2:1964 and this Part4 of the revision supersedes the remaining clauses; BS122-2:1964 is therefore withdrawn. 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. Comp
32、liance 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 toiv, pages1to42, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have ha
33、d amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS328-4:1983 BSI 01-2000 1 1 Scope This Part of this British Standard specifies the dimensions of the following commonly used types of reamer: hand reamers long-flute machine reamers 1)with Morse taper
34、 shanks machine chucking reamers 1) shell reamers socket reamers hand taper pin reamers machine taper pin reamers bridge reamers A method of calculating tolerances for special reamers is given in Appendix A. Appendix B shows the values of certain of the limits of tolerance specified, extracted from
35、BS4500-1. Appendix C specifies preferred inch sizes of cutting diameters for various types of reamer, and Appendix D shows tables of dimensions set out as functions of reamer diameter, i.e.“general tables”. NOTEThe titles of the publications referred to in this standard are listed on the inside back
36、 cover. 2 Nomenclature There are certain important differences between the reamer nomenclature that has been traditional in the UnitedKingdom and that used on the Continent of Europe. In particular, the two types of reamer known in the UnitedKingdom by the names in the left-hand column below have be
37、en known on the Continent by the names in the centre column. In order to avoid confusion, the names shown in the right-hand column have been adopted by ISO, and they are also used throughout this British Standard. 3 Terms and definitions NOTEThis clause is closely based on ISO5420. The numbers in Fi
38、gure 1 to Figure 9 link the features within the figures to the subclauses in the text; they are unchanged from those in ISO5420. For the purposes of this Part of BS328 the following definitions apply. Definitions of particular types of reamer are given in the appropriate clause in which the dimensio
39、ns of those reamers are specified. 3.1 axis the longitudinal centre line of the reamer NOTESee Figure 1. 3.2 shank the portion of the reamer by which it is held and driven NOTESee (a) of Figure 1 for taper shank, (b) of Figure 1 for parallel shank with hand square and (c) of Figure 1 for parallel sh
40、ank. 3.3 shank length the length of the portion of the reamer that starts after the recess behind the flutes and extends to the end of reamer NOTESee Figure 1. 3.4 tang the flattened end of a taper shank intended to fit into the slot in the socket and to be used for ejection purposes NOTESee Figure
41、1(a). 3.5 size of square the dimension across the flats of the squared portion at the extreme end of a parallel hand shank NOTESee Figure 1(b). 3.6 length of square the length of the squared portion at the extreme end of a parallel hand shank NOTESee Figure 1(b). 3.7 body that portion of the reamer
42、extending from the entering end of the reamer to the commencement of the shank NOTESee Figure 1. 3.8 recess the cylindrical portion with reduced diameter in the body NOTESee Figure 1. 1) See clause 2 Traditional United Kingdom name Traditional Continental name Name adopted by ISO Chucking reamer Mac
43、hine reamer Machine chucking reamer Parallel machine reamer Long-fluted machine reamer Long-flute machine reamerBS328-4:1983 2 BSI 01-2000 3.9 recess diameter the diameter of the cylindrical portion of the body which is reduced NOTESee Figure 1. 3.10 recess length the length of the cylindrical porti
44、on with reduced diameter in the body NOTESee Figure 1. 3.11 overall length the length over the extreme ends of the entering end and of the shank, excluding the length of external centres, if any NOTESee Figure 1. 3.12 cutting edge length the axial length of that portion of the fluted body provided w
45、ith primary clearances or circular lands and including the taper (3.13) and bevel leads(3.17, 3.18) NOTESee Figure 1. 3.13 taper lead that portion of the reamer extending from the entering end to the point where the diameter measured over the lands reaches the cutting diameter of the tool NOTE 1See
46、Figure 2(b). NOTE 2In the USA the taper lead is termed a “starting taper”. Figure 1 Principal elements of reamersBS328-4:1983 BSI 01-2000 3 3.14 taper lead length the length, measured axially, of the taper lead (3.13) NOTESee Figure 2(b). 3.15 taper lead angle the angle between the reamer axis (3.1)
47、 and the projection of the major cutting edge (3.31) in the plane passing through the reamer axis and the corner (3.35) NOTESee Figure 2(b). 3.16 included angle of taper lead the angle formed by the cutting edges of the taper lead (3.13) NOTESee Figure 2(b). 3.17 non-cutting bevel lead the angular p
48、ortion, if any, at the entering end of a hand reamer that facilitates the entry of the reamer into the hole NOTE 1See Figure 2(b). NOTE 2In the USA a non-cutting bevel lead is termed a “bevel”. 3.18 cutting bevel lead the angular cutting portion at the entering end of a machine reamer to facilitate
49、the entry of the reamer into the hole NOTE 1See Figure 2(a). NOTE 2The cutting bevel lead is not provided with a circular land (3.28). NOTE 3In the USA a cutting bevel lead is termed a “chamfer”. 3.19 bevel lead length the length measured axially, of the bevel lead(3.17, 3.18) NOTE 1See Figure 2. NOTE 2In the USA the bevel lead length is termed the “chamfer length”. 3.20 Bevel lead angle 3.20.1 bevel lead angle (non-cutti
