1、BRITISH STANDARDBS ISO 2490:2007Solid (monobloc) gear hobs with tenon drive or axial keyway, 0,5 to 40 module Nominal dimensionsICS 21.200g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3
2、g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 2490:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2007 BSI 2007ISBN 978 0 580 53947 3National forewordThis British Standard is the UK implementation of ISO 2490:2007.The UK parti
3、cipation in its preparation was entrusted by Technical Committee MCE/5, Gears, to Panel MCE/5/-/3, Gear forming tools.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contr
4、act. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publicationAmd. No. Date CommentsReference numberISO 2490:2007(E)INTERNATIONAL STANDARD ISO2490Third edition2007-10-01Solid (monobloc) gear
5、 hobs with tenon drive or axial keyway, 0,5 to 40 module Nominal dimensions Fraises-mres monoblocs entranement par tenon ou par clavette, de modules 0,5 40 Dimensions nominales BS ISO 2490:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Nominal dimensions. 1 Annex A (inf
6、ormative) Multiple thread hobs 5 Bibliography . 10 BS ISO 2490:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO techni
7、cal committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely w
8、ith the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft Int
9、ernational Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document m
10、ay be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 2490 was prepared by Technical Committee ISO/TC 60, Gears, Subcommittee SC 1, Nomenclature and wormgearing. This third edition cancels and replaces the second edition (ISO 2490:19
11、96), of which Tables 1 and 2, Figure 1 and Annex A have been technically revised. BS ISO 2490:20071Solid (monobloc) gear hobs with tenon drive or axial keyway, 0,5 to 40 module Nominal dimensions 1 Scope This International Standard specifies the nominal dimensions of general-purpose single-start sol
12、id (monobloc) gear hobs with axial keyway or tenon drive of 0,5 to 40 module. These hobs are intended for the production of gears which conform to ISO 54 and present a 20 pressure angle in conformity with ISO 53. NOTE Solid hobs are those made from one solid piece of material, as opposed to hobs whi
13、ch have inserted blades. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. I
14、SO 53:1998, Cylindrical gears for general and heavy engineering Standard basic rack tooth profile ISO 54:1996, Cylindrical gears for general engineering and for heavy engineering Modules ISO 240:1994, Milling cutters Interchangeability dimensions for cutter arbors or cutter mandrels ISO 2768-1:1989,
15、 General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications ISO 2780:1986, Milling cutters with tenon drive Interchangeability dimensions with cutter arbors Metric series 3 Nominal dimensions The nominal dimensions shall be as shown in Figure 1 a
16、nd given in Tables 1 and 2. BS ISO 2490:20072 a) Hob with axial keyway b) Hob with tenon drive Key D1hub diameter (mm) D outside diameter (mm) d bore diameter (mm) L overall length of hob with axial keyway (mm) L0overall length of hob with tenon drive (mm) c minimum hub length (mm) NOTE Keyway dimen
17、sions are specified in ISO 240 and tenonway dimensions are specified in ISO 2780. Figure 1 Gear hob dimensions BS ISO 2490:20073Table 1 Nominal dimensions of small-bore-type single-thread gear hobs Module, m ReferenceSeries Hub diameter Outside diameter Bore diameter Overall length Overall length Mi
18、nimum hub lengthTypical number of gashes D1D ad bL aL0ac Type bI II mm mm mm mm mm mm 1 0,5 24 8 10 1 12 0,55 24 8 10 1 12 0,6 24 8 10 1 12 0,7 24 8 10 1 12 0,75 24 8 12 1 12 0,8 24 8 12 1 12 0,9 24 8 12 1 12 1,0 24 8 12 1 12 2 0,5 32 10 20 30 2 12 0,55 32 10 20 30 2 12 0,6 32 10 20 30 2 12 0,7 32 1
19、0 20 30 2 12 0,75 32 10 20 30 2 12 0,8 32 10 20 30 2 12 0,9 32 10 20 30 2 12 1,0 32 10 20 30 2 12 1,125 32 10 20 30 2 12 1,25 40 10 25 35 2 10 1,375 40 10 25 35 2 10 1,50 40 10 25 35 2 10 1,75 40 10 30 40 2 10 2,0 40 10 30 40 2 10 3 0,5 32 13 20 30 2 12 0,55 32 13 20 30 2 12 0,6 32 13 20 30 2 12 0,7
20、 32 13 20 30 2 12 0,75 32 13 20 30 2 12 0,8 32 13 20 30 2 12 0,9 32 13 20 30 2 12 1,0 32 13 20 30 2 12 1,125 32 13 20 30 2 12 1,25 40 13 25 35 2 10 1,375 40 13 25 35 2 10 1,5 40 13 25 35 2 10 1,75 40 13 30 40 2 10 2,0 Diameter atmanufacturers discretion 40 13 30 40 2 10 aTolerances of outside diamet
21、er, D, L and L0shall be the “coarse” class as given in ISO 2768-1. bThe type is the segmentation based on the bore diameters. BS ISO 2490:20074 Table 2 Nominal dimensions of single-thread gear hobs Module, m Reference Series Hub diameter Outside diameter Bore diameter Overall length Overall length M
22、inimum hub length Typical number of gashes D1D ad bL aL0ac I II mm mm mm mm mm mm 1 50 22 50 65 4 14 1,125 50 22 50 65 4 14 1,25 50 22 50 65 4 14 1,375 50 22 50 65 4 14 1,5 55 22 55 70 4 14 1,75 55 22 55 70 4 14 2 65 27 60 75 4 14 2,25 65 27 60 75 4 14 2,5 70 27 65 80 4 14 2,75 70 27 65 80 4 14 3 75
23、 32 70 85 4 14 3,5 80 32 75 90 4 14 4 85 32 80 95 4 14 4,5 90 32 85 100 4 14 5 95 32 90 105 4 14 5,5 100 32 95 110 5 12 6 105 32 100 115 5 12 6,5 110 32 110 125 5 12 7 115 32 115 130 5 12 8 120 32 140 160 5 10 9 125 32 140 160 5 10 10 130 32 170 190 5 10 11 150 40 170 190 6 9 12 160 40 200 220 6 9 1
24、4 180 40 200 220 6 9 16 200 50 250 275 6 9 18 220 50 250 275 6 9 20 240 60 300 325 6 9 22 250 60 300 325 6 9 25 280 60 360 385 6 9 28 320 80 400 430 6 9 32 350 80 450 480 6 9 36 380 80 450 480 6 9 40 Diameter atmanufacturers discretion 400 80 480 510 6 9 aTolerances of dimensions D, L and L0shall be
25、 the “coarse” class as given in ISO 2768-1. bISO 2780 (tenonway dimensions) only gives values for bores up to 50 mm in diameter. BS ISO 2490:20075Annex A (informative) Multiple thread hobs BS ISO 2490:20076 TableA.1 Small-boregearhob outsidediametersand leadangles(multi-threads)Module,mNumberof thre
26、ads,z0Series All 1 2 3 Hubdiameter Outsidediameter Bore diameter Lead angle a, bOutsidediameter Bore diameter Lead angle a, bOutsidediameter Bore diameter Lead angle a, bD1D d0D d0D d0TypecI II mm mm mm mm mm mm 1 0,5 24 8 1,259 32 10 1,864 32 10 2,796 0,55 24 8 1,393 32 10 2,058 32 10 3,088 0,6 24
27、8 1,528 32 10 2,255 32 10 3,383 0,65 24 8 1,665 32 10 2,453 32 10 3,681 0,7 24 8 1,803 32 10 2,653 32 10 3,981 0,75 24 8 1,943 32 10 2,854 32 10 4,283 0,8 24 8 2,084 32 10 3,057 32 10 4,589 0,9 24 8 2,372 32 10 3,469 32 10 5,207 1 24 8 2,666 32 10 3,887 32 10 5,837 2 and 3 0,5 32 10 0,932 32 10 1,86
28、4 32 10 2,796 0,55 32 10 1,029 32 10 2,058 32 10 3,088 0,6 32 10 1,127 32 10 2,255 32 10 3,383 0,65 32 10 1,226 32 10 2,453 32 10 3,681 0,7 32 10 1,326 32 10 2,653 32 10 3,981 0,75 32 10 1,427 32 10 2,854 32 10 4,283 0,8 32 10 1,528 32 10 3,057 32 10 4,589 0,9 32 10 1,734 32 10 3,469 32 10 5,207 1 3
29、2 10 1,943 32 10 3,887 32 10 5,837 1,125 D i amet er at ma nufa c tur er s d i s c reti on 32 10 2,209 32 10 4,421 32 10 6,640 BS ISO 2490:20077Table A.1 (continued)Module,mNumberof threads,z0Series All 1 2 3 Hubdiameter Outsidediameter Bore diameter Lead angle a, bOutsidediameter Bore diameter Lead
30、 angle a, bOutsidediameter Bore diameter Lead angle a, bD1D d0D d0D d0TypecI II mm mm mm mm mm mm 1,25 40 10 1,943 40 10 3,887 40 10 5,837 2 and 3 (cont) 1,375 40 10 2,155 40 10 4,313 40 10 6,478 1,5 40 10 2,372 40 10 4,747 40 10 7,131 1,75 40 10 2,816 40 10 5,638 40 10 8,474 2 D i amet er at manu f
31、ac t urer s dis c reti on 40 10 3,276 40 10 6,562 40 10 9,871 aAxialgashing isnormallyup to a 6lead angle.bThe lead angle ofthe gear hob iscalculated fromthe formula:00a0sin2mzDh=where 0isthe leadangle ofthegear hob;misthe module;z0isthe numberofthreads on thegear hob;Disthe outsidediameter ofthe ge
32、arhob;ha0isthe addendumofthe gear hob(in conformitywith ISO53).cThe type isthe segmentation based on thebore diameters.7BS ISO 2490:20078 TableA.2 Gearhob outsidediametersand leadangles(multi-threads)Module,mNumberof threads,z0SeriesAll1 2 3 4 Hub diameter Outsidediameter Borediameter Lead angle bMa
33、ximumnumber ofgashes aOutsidediameterBorediameterLead angle bMaximumnumber ofgashes aOutsidediameter BorediameterLead angle bMaximumnumber ofgashes aOutsidediameterBorediameterLead angle bMaximumnumber ofgashes aD1D d0N Dd 0N Dd 0N Dd 0N mm mm mm mm mm mm mm mm 1 50 22 1,206 16 55 22 2,183 17 60 22
34、2,991 18 85 32 2,779 23 1,125 50 22 1,366 16 55 22 2,471 17 60 22 3,383 18 90 32 2,959 23 1,25 50 22 1,528 16 55 22 2,762 17 60 22 3,780 18 95 32 3,120 25 1,375 50 22 1,692 16 55 22 3,057 17 65 27 3,842 19 95 32 3,444 25 1,5 55 22 1,677 16 60 22 3,057 17 70 27 3,895 19 100 32 3,574 25 1,75 55 22 1,9
35、81 16 60 22 3,608 17 80 32 3,981 20 110 32 3,800 25 2 65 27 1,910 16 70 27 3,528 17 90 32 4,048 20 120 32 3,989 25 2,25 65 27 2,172 15 80 32 3,469 17 100 32 4,101 22 120 32 4,513 25 2,5 70 27 2,247 15 85 32 3,640 18 110 32 4,145 22 120 32 5,044 25 2,75 70 27 2,497 15 85 32 4,037 18 110 32 4,589 22 1
36、30 32 5,126 25 3 75 32 2,547 15 90 32 4,171 18 115 32 4,802 22 130 32 5,622 27 3,5 80 32 2,816 14 100 32 4,400 18 125 32 5,182 22 150 40 5,688 27 4 85 32 3,057 14 115 32 4,370 19 140 32 5,296 22 170 40 5,739 27 4,5 90 32 3,276 14 120 32 4,747 19 150 40 5,584 22 180 40 6,123 27 5 95 32 3,475 14 125 3
37、2 5,100 19 160 40 5,837 22 190 40 6,470 27 5,5 100 32 3,656 13 135 32 5,205 19 170 40 6,062 22 200 50 6,784 27 6 105 32 3,823 13 140 32 5,509 18 175 40 6,459 22 210 50 7,070 27 6,5 110 32 3,976 13 150 40 5,578 18 7 115 32 4,117 13 155 40 5,844 18 8 120 32 4,589 12 160 40 6,562 17 9 125 32 5,037 12 1
38、70 40 7,010 16 10 130 32 5,465 12 180 40 7,414 16 11 150 40 5,152 11 200 50 7,327 16 12 160 40 5,296 11 210 50 7,662 15 14 180 40 5,541 10 240 60 7,850 15 16 200 50 5,739 10 270 60 7,998 15 18 220 50 5,904 10 20 240 60 6,042 10 22 250 60 6,478 10 25 280 60 6,600 10 28 320 80 6,431 10 32 350 80 6,807
39、 9 36 380 80 7,131 9 40 Di am et er at m anu f a ct urer s di sc ret i on 400 80 7,662 9 BS ISO 2490:2007Table A.2 (continued)Module,mNumberof threads,z0SeriesAll5 6 7 Hub diameter OutsidediameterBorediameterLead angle bMaximumnumber ofgashes aOutsidediameterBorediameterLead angle bMaximumnumber ofg
40、ashes aOutsidediameterBorediameterLead angle bMaximumnumber ofgashes aD1D d0N Dd 0N Dd 0N mm mm mm mm mm mm 1 85 32 3,475 23 85 32 4,171 23 85 32 4,867 23 1,125 90 32 3,699 23 90 32 4,440 23 90 32 5,182 23 1,25 95 32 3,901 25 95 32 4,682 25 95 32 5,465 25 1,375 95 32 4,306 25 95 32 5,169 25 95 32 6,
41、034 25 1,5 100 32 4,469 25 100 32 5,365 25 100 32 6,263 25 1,75 110 32 4,752 25 110 32 5,705 25 110 32 6,660 25 2 120 32 4,989 25 120 32 5,990 25 120 32 6,993 25 2,25 120 32 5,645 25 120 32 6,779 25 120 32 7,915 25 2,5 120 32 6,309 25 120 32 7,578 25 120 32 8,850 25 2,75 130 32 6,412 25 130 32 7,701
42、 25 130 32 8,995 25 3 130 32 7,033 27 130 32 8,450 27 130 32 9,871 27 3,5 Di am et er at m anuf act u rer s di sc ret i on 150 40 7,117 27 150 40 8,550 27 150 40 9,989 27 aAxialgashing isnormallyup to a 6lead angle.bThe lead angle ofthe gear hob iscalculated fromthe formula:00a0sin2mzDh=where 0isthe
43、 leadangle ofthegear hob;misthe module;z0isthe numberofthreads on thegear hob;Disthe outsidediameter ofthe gearhob;ha0isthe addendumofthe gear hob(in conformitywith ISO53).9BS ISO 2490:200710 Bibliography 1 ISO 701:1998, International gear notation Symbols for geometrical data 2 ISO 839-2:1977, Mill
44、ing machine arbors with 7/24 tapers Part 2: Accessories 3 ISO 1122-1:1998, Vocabulary of gear terms Part 1: Definitions related to geometry 4 ISO 4468:1982, Gear hobs Single start Accuracy requirements BS ISO 2490:2007blankBS ISO 2490:2007BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards In
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