1、BRITISH STANDARD BS 1983-1: 1969 Incorporating Amendment No. 1 Specification for Chucks for machine tools and portable power tools Part 1: Tool-holding chucksBS1983-1:1969 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committee,was published underthe auth
2、orityof the ExecutiveBoardon 21 March 1969 BSI 11-1999 First published July 1953 First revision March 1969 The following BSI references relate to the work on this standard: Committee reference MEE/6/13 Draft for comment 67/31056 ISBN 580 05277 X Co-operating organizations The Mechanical Engineering
3、Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: The Government departments and scientific and industrial organizations marked with an asterisk
4、in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Associated Offices Technical Committee Institute of Marine Engineers Association of Consulting Engineers Institution of Civil Engineers Association of M
5、ining Electrical and Institution of Gas Engineers Mechanical Engineers Institution of Heating and Ventilating Board of Trade Engineers British Chemical Plant Manufacturers Institution of Mechanical Engineers* Association Institution of Mechanical Engineers British Compressed Air Society (Automobile
6、Division) British Electrical and Allied Manufacturers Institution of Production Engineers* Association* Locomotive and Allied Manufacturers British Gear Manufacturers Association Association of Great Britain British Internal Combustion Engine London Transport Board Manufacturers Association Machine
7、Tool Trades Association* British Mechanical Engineering Federation Ministry of Defence British Pump Manufacturers Association Ministry of Defence, Army Department* British Steel Industry Ministry of Power Crown Agents for Oversea Governments Ministry of Public Building and Works* and Administrations
8、 Ministry of Technology Department of Employment and Productivity Ministry of Technology National (H.M. Factory Inspectorate) Engineering Laboratory* Electricity Council, the Central Electricity Ministry of Transport Generating Board and the Area Boards in National Coal Board England and Wales Natio
9、nal Physical Laboratory (Ministry of Engineering Equipment Users Association Technology) Gas Council Royal Institute of British Architects Association of Supervisory Staffs Portable Electric Tool Manufacturers Executives and Technicians Association Gauge the threads in the corresponding machine spin
10、dles are standard but are fully capable of mating with the respective chuck threads. 1) BS 2556, “Hand and breast drills”. 2) ISO/R 239, “Drill chuck tapers” (issued by the International Organization for Standardization).BS1983-1:1969 BSI 11-1999 iii A British Standard does not purport to include al
11、l 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 comprises a front cover, an inside front cover, pages i to
12、iv, pages1to 20, 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.iv blankBS1983-1:1969 BSI 11-1999 1 1 Scope This British Standard specifies re
13、quirements for the mounting and accuracy of tool-holding chucks for use in machine tools and portable power tools and in particular to the five types of these chucks described in Clause2. Examples of typical chuck capacities by types, and related mounting details are shown in Appendix A. NOTE 1The m
14、illimetre and inch dimensions given in Table 1, Table 2, Table 3 and Table 4 are sufficiently close conversions that chucks dimensioned in millimetres may be used with spindles dimensioned in inches and vice versa. NOTE 2In Clause 4, all the millimetre dimensions relate to chucks whose rated capacit
15、ies are stated in millimetres and the inch dimensions to those whose rated capacity is stated in inches. Corresponding values are in general equivalent to each other but are not accurate conversions. NOTE 3More accurate conversions should be based on the data in BS 350, “Conversion factors and table
16、s”. 2 Description of types of tool-holding chucks The five types of tool-holding chucks covered in this standard are as follows: 2.1 Guided three-jaw light duty chuck. In this type of chuck, the three jaws which grip the shank of a drill operate in guides in the chuck body. The chuck is tightened an
17、d untightened by means of a geared key and, though suitable for any light duty application, is mainly used with light duty portable power tools (seeFigure 1). 2.2 Guided three-jaw industrial chuck. In this type of chuck also, the three jaws which grip the shank of a drill operate in guides in the ch
18、uck body and the chuck is tightened and untightened by means of a geared key. It is capable of transmitting higher torque loads than the light duty chuck and is suitable for use with machine tools and medium duty and heavy duty portable power tools (seeFigure 2). Figure 1 A typical guided three-jaw
19、light duty chuckBS1983-1:1969 2 BSI 11-1999 2.3 Guided three-jaw, keyless, self-tightening chuck. In this type of chuck also, the three jaws operate in guides in the chuck body. The chuck after hand tightening operates without any auxiliary tightening mechanism. As the chuck is designed to self tigh
20、ten under increased drilling torque, a gripping collar is usually fitted to assist untightening (see Figure 3). As for key type chucks (2.1 and 2.2), keyless chucks are available for light duty and industrial applications. Figure 2 A typical guided three-jaw industrial chuckBS1983-1:1969 BSI 11-1999
21、 3 2.4 Tap-holding industrial chuck. This type of chuck enables conventional ground thread hand taps to be utilized on machine tools and portable power tools. Two sets of jaws are incorporated in each chuck, the lower set for centralizing a tap by means of its round shank and the upper set to effect
22、 a positive drive on the tap square (see Figure 4). 2.5 Quick change collet type industrial chuck. This type of chuck accommodates quick engaging and quick releasing collets and allows collets to be changed whilst the machine spindle is rotating under power. The collets are primarily designed to hol
23、d taper shank drills but many collet variations are available which permit the use of straight shank drills, taps and special tools. The main chuck housing terminates in a Morse taper shank and, when mounted in a machine spindle, becomes virtually an integral part of the machine, the collet providin
24、g the quick change facilities (see Figure 5). NOTEFigure 1Figure 5 illustrate typical chucks but do not imply any particular design or method of construction. Figure 3 A typical guided three-jaw, keyless, self tightening chuck Figure 4 A typical tap-holding industrial chuckBS1983-1:1969 4 BSI 11-199
25、9 3 Mounting details Chucks shall be mounted on the machine spindle by one of the four methods detailed in this clause. 3.1 Short Morse taper shank 3.1.1 Except for the B6 taper (see Note 4 to Table 1), short Morse taper shanks have the same rate of taper as the corresponding Morse taper (see BS 166
26、0-1 3) ) but are shorter in length, being taken from either the small end or the large end of the Morse taper. Figure 5 A typical quick change collet type industrial chuck 3) BS 1660, “Machine tapers”, Part 1, “Self-holding tapers and gauges for self-holding tapers”.BS1983-1:1969 BSI 11-1999 5 3.1.2
27、 The short Morse taper in the chuck body shall conform to the dimensions given in Table 1. Figure 6 Taper bore in chuck Figure 7 Spindle end with taper shankBS1983-1:1969 6 BSI 11-1999 Table 1 Short morse taper bores in chucks (See Figure 6) 3.1.3 The spindle end to receive a chuck with a taper bore
28、 as detailed in 3.1.2 shall have a taper shank conforming to the dimensions given in Table 2. Designation of taper Gauge plane diameter (Notes 1 and 2) A Length of taper bore B Diameter of small end of taper bore C Diameter of recess D Length of recess E Chamfer F Taper (Note 2) Morse On diameter To
29、l N 9 a AUX (Note3) Tol H 13 a A. Dimensions in millimetres B6 (Note 4) 6.350 7.92 5.954 6.5 3.5 0.5 0.05 B10 10.094 13.11 9.441 9.8 3.5 1.0 1 0.049 88 B12 12.065 17.07 11.214 11.5 3.5 1.0 B16 15.733 22.63 14.602 15.0 3.5 1.5 2 0.049 95 B18 17.780 30.56 16.253 16.8 3.5 1.5 B22 21.793 37.69 19.901 20
30、.5 3.5 2.0 3 0.050 20 B24 23.825 48.41 21.395 22.0 3.5 2.0 B. Dimensions in inches B6 (Note 4) 0.250 0 0.312 0.234 4 0.256 1 / 8 1 / 64 0.05 B10 0.397 4 0.516 0.371 7 0.386 1 / 8 3 / 64 1 0.049 88 B12 0.475 0 0.672 0.441 5 0.453 1 / 8 3 / 64 B16 0.619 4 0.891 0.574 9 0.591 1 / 8 1 / 16 2 0.049 95 B1
31、8 0.700 0 1.203 0.639 9 0.661 1 / 8 1 / 16 B22 0.858 0 1.484 0.783 5 0.807 1 / 8 5 / 64 3 0.050 20 B24 0.938 0 1.906 0.842 0.866 1 / 8 5 / 64 NOTE 1The gauge plane diameter A is the diameter at the wide end of the taper bore before chamfering. NOTE 2Except for the B6 taper, the dimension A and the r
32、ate of taper are in accordance with ISO/R 239, “Drill chuck tapers”. Thedimensions specified for chuck taper bores in accordance with this table (except for the B6 taper) are functionally interchangeable with the dimensions of Morse drill chuck tapers of ISO/R 239. NOTE 3Dimension C is an AUXILIARY
33、dimension (see BS 308, “Engineering drawing practice”); calculated values are given for information. NOTE 4The taper B6 is not included in ISO/R 239. a See BS 1916, “Limits and fits for engineering”. BS1983-1:1969 BSI 11-1999 7 Table 2 Short morse taper shanks on spindle ends (See Figure 7) 3.2 Jaco
34、bs taper shank 3.2.1 The Jacobs taper in the chuck body shall conform to the dimensions given inTable 3. Designation of taper Gauge plane diameter (Note 1) A Length of taper shank below gauge plane (Note 1) G Diameter of small end of taper shank (Notes 1 and 3) H Length of taper above gauge plane J
35、Diameter of large end of taper shank K Chamfer (Note 1) L Taper (Note 1) Morse On diameter Tol k9 AUX (Note 2) AUX (Note 2) A. Dimensions in millimetres B6 (Note 4) 6.350 10.0 5.85 0.8 6.39 0.5 0.05 B10 10.094 14.5 9.370 0.8 10.13 1.0 1 0.049 88 B12 12.065 18.5 11.143 0.8 12.12 1.0 B16 15.733 24.0 1
36、4.534 0.8 15.77 1.5 2 0.049 95 B18 17.780 32.0 16.182 0.8 17.83 1.5 B22 21.793 40.5 19.761 0.8 21.84 2.0 3 0.050 20 B24 23.825 50.5 21.3 0.8 23.87 2.0 B. Dimensions in inches B6 (Note 4) 0.250 0 0.393 7 0.230 3 1 / 32 0.252 1 / 64 0.05 B10 0.397 4 0.571 0.368 9 1 / 32 0.399 3 / 64 1 0.049 88 B12 0.4
37、75 0 0.728 0.438 7 1 / 32 0.477 3 / 64 B16 0.619 4 0.945 0.572 2 1 / 32 0.621 1 / 16 2 0.049 95 B18 0.700 0 1.260 0.637 1 1 / 32 0.702 1 / 16 B22 0.858 0 1.594 0.778 0 1 / 32 0.860 5 / 64 3 0.050 20 B24 0.938 0 1.988 0.838 2 1 / 32 0.940 5 / 64 NOTE 1Except for the B6 taper, dimensions A, G, H and L
38、 and the rate of taper are in accordance with ISO/R 239, “Drill chucktapers”. The dimensions of taper shanks in accordance with this table (except for the B6 taper) are functionally interchangeable with the dimensions of Morse drill chuck tapers of ISO/R 239. NOTE 2Dimensions H and K are AUXILIARY dimensions (see BS 308, “Engineering drawing practice”); the calculated values are given for information. NOTE 3The diameter of the small end of the taper shank H is that calculated before chamfering. NOTE 4The taper B6 is not included in ISO/R 239. Figure 8 Taper bore in chuck
