1、BRITISH STANDARD BS 5078:1974 Specification for Jig and fixture components UDC 621.753.4:621229BS5078:1974 This British Standard, having been approved by theMechanicalEngineering IndustryStandards Committee,was published underthe authorityof the ExecutiveBoardon 28 June1974 BSI 12-1999 The following
2、 BSI references relate to the work on this standard: Committee reference MEE/142 Draft for comment72/32530 DC ISBN 0 580 08363 2 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives
3、 from the following Government departments and professional and industrial organizations: The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the prepa
4、ration of this British Standard: Associated Offices Technical Committee Department of Trade and Industry National Association of Consulting Engineers Engineering Laboratory* Association of Hydraulic Equipment Electricity Supply Industry in England Manufacturers Ltd. and Wales Association of Mining E
5、lectrical and Engineering Equipment Users Association Mechanical Engineers Federation of Manufacturers of British Compressed Air Society Construction Equipment and Cranes British Electrical and Allied Manufacturers Institution of Gas Engineers Association* Institution of Heating and Ventilating Brit
6、ish Gas Corporation Engineers British Gear Manufacturers Association Institution of Mechanical Engineers* British Internal Combustion Engine Institution of Plant Engineers Manufacturers Association Institution of Production Engineers British Mechanical Engineering London Transport Executive* Confede
7、ration Machine Tool Trades Association* British Pump Manufacturers Association Ministry of Defence British Steel Corporation Ministry of Defence, Army Department* British Steel Industry National Coal Board Crown Agents for Oversea Governments Process Plant Association and Administrations Railway Ind
8、ustries Association of Department of Employment GreatBritain (HM Factory Inspectorate) Royal Institute of British Architects Department of the Environment Telecommunication Engineering and Department of Trade and Industry, ENT Manufacturing Association Department of Trade and Industry, Marine Divisi
9、on British Railways Board Society of Motor Manufacturers and Trades Gauge and Tool Makers Association Ltd. Amendments issued since publication Amd. No. Date of issue CommentsBS5078:1974 BSI 12-1999 i Contents Page Co-operating organizations Inside front cover Foreword iii 1 Scope 1 2 General toleran
10、ces 1 3 Threads 1 4 Hexagons 1 5 Knurling 1 6 Finish 1 Table 1 Small base plates, cast iron 2 Table 2 Large base plates, cast iron 2 Table 3 Webbed angle bases, cast iron 3 Table 4 Sandwich jig bases, cast iron 3 Table 5 Jig plates, steel 4 Table 6 Jig plates, cast iron 5 Table 7 Circular jig plates
11、, steel 6 Table 8 Circular blanks, steel 7 Table 9 Circular blanks, cast iron 7 Table 10 Flanged circular blanks, cast iron 8 Table 11 Flanged rectangular blanks, cast iron 8 Table 12 Bolsters, cast iron 9 Table 13 Circular adaptors, cast iron 9 Table 14 Rectangular plates, cast iron 10 Table 15 Squ
12、are blocks, cast iron 11 Table 16 Unequal “T” sections, cast iron 12 Table 17 Unequal “T” sections, heavy duty, cast iron 13 Table 18 Equal “T” sections, cast iron 14 Table 19 Equal “T” sections, heavy duty, cast iron 15 Table 20 Webbed “T” sections, cast iron 16 Table 21 “L” sections, cast iron 17
13、Table 22 “L” sections, heavy duty, cast iron 18 Table 23 Webbed “L” sections, cast iron 19 Table 24 “U” sections, cast iron 20 Table 25 Channel sections, cast iron 21 Table 26 Hollow rectangular blocks, cast iron 22 Table 27 Hollow square blocks, cast iron 23 Table 28 “H” sections, cast iron 24 Tabl
14、e 29 Latch plate sections, cast iron 25 Table 30 “V” sections, cast iron 26 Table 31 Plain clamps, steel 27 Table 32 Slotted clamps, steel 28 Table 33 Heavy duty slotted clamps, steel 29 Table 34 Double ended clamps, steel 30 Table 35 Swing clamps, steel 31 Table 36 Parallel clamp plates, steel 32 T
15、able 37 Wide clamp plates, steel 33 Table 38 Clamp buttons 34 Table 39 Fixed heel clamps, steel 35 Table 40 Adjustable heel pins, steel 36BS5078:1974 ii BSI 12-1999 Page Table 41 Jig foot bolts, steel 37 Table 42 Jig foot nuts, steel 38 Table 43 Jig feet, steel 38 Table 44 Jig feet, screw retained t
16、ype, steel 39 Table 45 Thumb nuts, steel 39 Table 46 Thumb nuts, quick release, steel 40 Table 47 Tommy bar nuts, steel 41 Table 48 Domed nuts, steel 42 Table 49 Spherical seating nuts, steel 43 Table 50 Collar nuts, steel 44 Table 51 Coupling extension nuts, steel 45 Table 52 Spherical seatings and
17、 washers, steel 46 Table 53 Machine knobs, ball type 47 Table 54 Machine knobs, taper type 48 Table 55 Captive “C” washers, steel 49 Table 56 “C” washers, steel 50 Table 57 Shoulder screws, steel 51 Publications referred to Inside back coverBS5078:1974 BSI 12-1999 iii Foreword This British Standard
18、for jig and fixture components has been prepared under the authority of the Mechanical Engineering Industry Standards Committee. The range of components has been drawn up without elaborations or extensions of any particular design, but is a simple, basic set of essentials required for jig and fixtur
19、e work. The design of the individual components has been kept as simple and as functional as possible. Only relevant dimensions for interchangeability and overall sizes have been specified for the components. This, to a certain extent, should allow manufacturers to make the components to their own d
20、esigns, yet allow complete interchangeability of items made by different manufacturers. Tolerances have been imposed only on component dimensions where interchangeability will be affected, or where special fits are required. In general, chamfers, radii and other manufacturing necessities have not be
21、en dimensioned, these having been left to the discretion of the manufacturer. 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 con
22、fer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, pages1to52, 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
23、the amendment table on the inside front cover.iv blankBS5078:1974 BSI 12-1999 1 1 Scope This British Standard specifies dimensions and materials and, where appropriate, tolerances for the following jig and fixture components: base and jig plates circular and rectangular blanks, bolsters, plates and
24、blocks clamps clamp buttons, heel pins and jig feet sections nuts spherical seatings and washers knobs “C” washers shoulder screws. A reference number has been allocated to each individual item to facilitate identification. NOTEThe titles of the British Standards referred to in this standard are lis
25、ted on the inside back cover. 2 General tolerances Cast iron sections, with the exception of the end faces, shall be machined to the following tolerances: The ends of sections may be supplied in a sawn condition, but if so, the section shall clean up to within the tolerance for the related size. 3 T
26、hreads All screw threads shall meet the requirements ofBS3643-2 and be to the following thread tolerance class: 4 Hexagons The hexagon sizes shown on any components, unless otherwise stated, are specified for the corresponding thread size of the component as shown inBS3692. 5 Knurling Knurling on co
27、mponents may be either straight or diamond, as selected by the manufacturer. 6 Finish Steel components shall be suitably protected against rust, under normal conditions, by plating or by an accepted protective finish, such as phosphate coating in accordance withBS3189, type1A or1B as selected by the
28、 manufacturer. squareness 1 parallelism 0.025mm/150mm tolerance on general dimensions 1% of nominal. tapped holes 6H studs 4h other male threads 6gBS5078:1974 2 BSI 12-1999 Table 1 Small base plates, cast iron Table 2 Large base plates, cast iron Dimensionsinmillimetres 1 2 3 Ref.no. A B 01-1 160 16
29、0 01-2 250 160 01-3 315 200 01-4 250 350 01-5 315 250 01-6 400 250 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition. Dimensionsinmillimetres 1 2 3 4 Ref.no. A B C 02-1 500 250 250 02-2 630 250 315 02-3 630 400 315 Material. Cast iron toBS1452, Grade14. To be supplie
30、d in a suitably aged condition.BS5078:1974 BSI 12-1999 3 Table 3 Webbed angle bases, cast iron Table 4 Sandwich jig bases, cast iron Dimensionsinmillimetres 1 2 3 4 5 6 7 8 9 10 Ref.no. A B C D E F G H J 03-1 160 80 63 28 22 20 160 112 16 03-2 200 100 80 28 22 22 212 132 20 03-3 250 160 100 35 28 28
31、 280 170 22 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition. Dimensionsinmillimetres 1 2 3 4 5 6 Ref.no. A Lengths (min.) 04-1 100 150 305 480 635 04-2 160 04-3 200 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition.BS5078:1974 4 BSI
32、 12-1999 Table 5 Jig plates, steel Dimensionsinmillimetres 1 2 3 4 5 6 7 8 Ref.no. A B C D E Dia. F (H7) a G 05-1 80 100 60 80 12 10 5 05-2 100 100 80 80 12 10 5 05-3 125 125 105 105 12 10 5 05-4 125 160 105 140 16 10 5 05-5 160 160 140 140 16 10 5 05-6 160 200 135 175 20 12 8 05-7 200 200 175 175 2
33、0 12 8 05-8 160 250 135 225 20 12 8 05-9 200 250 175 225 20 12 8 05-10 250 250 225 225 20 12 8 05-11 250 315 225 290 22 12 8 05-12 315 315 290 290 22 12 8 a See BS 4500 Material. Steel toBS4360, Grade43A, or suitable alternative.BS5078:1974 BSI 12-1999 5 Table 6 Jig plates, cast iron Dimensionsinmil
34、limetres 1 2 3 4 5 6 7 Ref.no. A B C D E Dia. F (H7) a 06-1 90 110 60 80 12 10 06-2 110 110 80 80 12 10 06-3 135 135 105 105 12 10 06-4 135 170 105 140 16 10 06-5 170 170 140 140 16 10 06-6 170 210 135 175 20 12 06-7 210 210 175 175 20 12 06-8 170 260 135 225 20 12 06-9 210 260 175 225 20 12 a SeeBS
35、4500. Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition.BS5078:1974 6 BSI 12-1999 Table 7 Circular jig plates, steel Dimensionsinmillimetres 1 2 3 4 5 Ref.no. A B P.C.D. C Dia. D (H7) a 07-1 16 100 78 10 07-2 16 125 103 10 07-3 20 160 138 10 07-4 20 200 170 12 07-5 2
36、0 250 220 12 07-6 22 315 285 12 a See BS4500 Material. Steel toBS4360, Grade43A, or suitable alternative.BS5078:1974 BSI 12-1999 7 Table 8 Circular blanks, steel Table 9 Circular blanks, cast iron Dimensionsinmillimetres 1 2 Ref.no. A B 08-1 100 16 08-2 125 16 08-3 160 20 08-4 200 20 08-5 250 20 08-
37、6 315 22 08-7 400 25 08-8 500 25 Material. Steel toBS4360, Grade43A, or suitable alternative. Dimensionsinmillimetres Dimensionsinmillimetres 1 2 3 1 2 3 Ref.no. A B Ref.no. A B 09-1 63 14 09-10 315 45 09-2 80 16 09-11 315 60 09-3 100 20 09-12 400 45 09-4 125 25 09-13 400 60 09-5 160 32 09-14 500 45
38、 90-6 200 32 09-15 500 60 90-7 200 60 09-16 630 45 09-8 250 32 09-17 630 60 09-9 250 60 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition.BS5078:1974 8 BSI 12-1999 Table 10 Flanged circular blanks, cast iron Table 11 Flanged rectangular blanks, cast iron Dimensionsin
39、millimetres 1 2 3 4 Ref.no. A B C 10-1 160 45 200 10-2 180 45 224 10-3 200 45 250 10-4 224 50 280 10-5 250 50 300 10-6 280 50 335 10-7 315 50 375 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition. Dimensionsinmillimetres 1 2 3 4 Ref.no. A B C 11-1 160 160 45 11-2 224
40、 160 45 11-3 315 200 50 11-4 250 250 50 11-5 315 250 50 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition.BS5078:1974 BSI 12-1999 9 Table 12 Bolsters, cast iron Table 13 Circular adaptors, cast iron Dimensionsinmillimetres 1 2 3 4 5 6 7 Ref.no. A B Lengths (min.) 12-
41、1 80 25 150 305 635 12-2 100 25 150 305 635 12-3 125 25 150 305 635 12-4 160 32 150 305 635 1000 12-5 200 32 150 305 635 1000 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition. Dimensionsinmillimetres 1 2 3 4 5 Ref.no. A B C D 13-1 100 200 80 32 13-2 100 224 90 40 13
42、-3 100 250 90 40 13-4 160 280 100 40 13-5 160 315 112 40 13-6 160 355 112 40 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition.BS5078:1974 10 BSI 12-1999 Table 14 Rectangular plates, cast iron Dimensionsinmillimetres 1 2 3 4 5 6 Ref.no. A B Lengths (min.) 14-1 12 80
43、150 305 14-2 12 100 150 305 14-3 12 125 150 305 14-4 12 160 150 305 14-5 12 200 150 305 14-6 16 80 150 305 14-7 20 100 150 305 14-8 20 125 150 305 14-9 20 160 150 305 14-10 20 200 150 305 14-11 20 224 150 305 635 14-12 25 160 150 305 635 14-13 32 160 150 305 635 14-14 32 200 150 305 635 14-15 32 250
44、 150 305 635 14-16 40 200 150 305 635 14-17 40 315 150 305 635 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition.BS5078:1974 BSI 12-1999 11 Table 15 Square blocks, cast iron Dimensionsinmillimetres 1 2 3 4 5 6 7 8 Ref.no. A B Lengths (min.) 15-1 45 45 75 150 230 305
45、455 15-2 50 50 75 150 230 305 455 15-3 56 56 75 150 230 305 455 15-4 63 63 75 150 230 305 455 15-5 70 70 75 150 230 305 455 15-6 80 80 75 150 230 305 455 15-7 90 90 75 150 230 305 455 15-8 100 100 75 150 230 305 455 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition.B
46、S5078:1974 12 BSI 12-1999 Table 16 Unequal “T” sections, cast iron Dimensionsinmillimetres 1 2 3 4 5 6 7 8 9 Ref.no. A B C Lengths (min.) 16-1 100 20 63 70 150 225 305 635 16-2 125 20 80 70 150 225 305 635 16-3 160 25 100 70 150 225 305 635 16-4 200 32 125 70 150 225 305 480 Material. Cast iron toBS
47、1452, Grade14. To be supplied in a suitably aged condition.BS5078:1974 BSI 12-1999 13 Table 17 Unequal “T” sections, heavy duty, cast iron Dimensionsinmillimetres 1 2 3 4 5 6 7 8 9 10 11 Ref.no. A B C D E Lengths (min.) 17-1 100 80 22 50 25 70 150 225 305 635 17-2 125 100 25 63 28 70 150 225 305 635
48、 17-3 160 125 28 80 32 70 150 225 305 635 17-4 200 160 32 100 36 70 150 225 305 480 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition.BS5078:1974 14 BSI 12-1999 Table 18 Equal “T” sections, cast iron Dimensionsinmillimetres 1 2 3 4 5 6 7 8 Ref.no. A B Lengths (min.)
49、18-1 80 16 70 150 225 305 635 18-2 100 20 70 150 225 305 635 18-3 125 20 70 150 225 305 635 18-4 160 25 70 150 225 305 635 18-5 200 32 70 150 225 305 480 Material. Cast iron toBS1452, Grade14. To be supplied in a suitably aged condition.BS5078:1974 BSI 12-1999 15 Table 19 Equal “T” sections, heavy duty, cast iron Dimensionsinmillimetres 1 2 3 4 5 6 7 8 9 Ref.no. A B C Len
