1、BRITISH STANDARD AEROSPACE SERIES BS A328-2: 1999 ISO8399-2: 1998 Accessory drives and mounting flanges (Metric sizes) Part2: Dimensions ICS49.035; 49.050BSA328-2:1999 This British Standard, having been prepared under the directionof the Engineering SectorCommittee, was publishedunder the authority
2、ofthe Standards Committee andcomes into effect on 15February 1999 BSI 04-1999 ISBN 0 580 30328 4 National foreword This British Standard reproduces verbatim ISO8399-2:1998 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee ACE/
3、14, Aerospace details and parts, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and Euro
4、pean developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Stand
5、ards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible f
6、or 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, pagesi andii, theISO title page, page ii, pages 1 to10 and a back cover. This standard has been u
7、pdated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSA328-2:1999 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword ii 1 Scope
8、1 2 Normative references 1 3 Dimensions 1 4 Spigot 1 5 Locating of flanges 1 6 Involute spline 2 Figure 1 Configuration and dimensions of accessory and engine or gearbox flanges 3 Figure 2 Configuration and dimensions of accessory and engine or gearbox flanges with locating pins 6 Figure 3 Configura
9、tion and dimensions for transfer tubes 7 Figure 4 Configuration and dimensions for unlubricated involute splines 8 Figure 5 Configuration and dimensions for lubricated involute splines 9 Table 1 Dimensions for accessory and engine or gearbox flanges 5 Table 2 Dimensions for accessory and engine or g
10、earbox flanges with locating pins 6 Table 3 Lengths and associated dimensions for unlubricated involute splines 8 Table 4 Lengths and associated dimensions for lubricated involute splines 10ii blankBSA328-2:1999 ii BSI 04-1999 Foreword ISO (the International Organization for Standardization) is a wo
11、rldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented o
12、n that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopt
13、ed by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO8399-2 was prepared by Technical Committee ISO/TC20, Aerospace, Subcommittee SC12, M
14、echanical system parts. ISO8399 consists of the following parts, under the general title Aerospace Accessory drives and mounting flanges (Metric series): Part1: Design criteria; Part2: Dimensions. Descriptors: Aircraft industry, mechanical drives, gear boxes, accessories, retaining flanges, coupling
15、s, form specifications, dimensions.BSA328-2:1999 BSI 04-1999 1 1 Scope This part of ISO8399 specifies the dimensions of couplings for accessory drives and mounting flanges with quick attach/detach provisions primarily intended for use in aircraft gearboxes and engine accessories. 2 Normative referen
16、ces The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO8399. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO8399 are encou
17、raged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO286-2:1988, ISO system of limits and fits Part2:Tables of standard tolerance grades and limit deviation
18、s for holes and shafts. ISO1302:1992, Technical drawings Method of indicating surface texture. ISO2768-1:1989, General tolerances Part1:Tolerances for linear and angular dimensions without individual tolerance indications. ISO3601-1:1988, Fluid systems Sealing devices O-rings Part1: Inside diameters
19、, cross-sections, tolerances and size identification code. ISO4156:1981, Straight cylindrical involute splines Metric module, side fit Generalities, dimensions and inspection. ISO4287:1997, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface textur
20、e parameters. ISO8399-1:1998, Aerospace Accessory drives and mounting flanges (Metric series) Part1:Design criteria. ISO13715:1994, Technical drawings Corners Vocabulary and indication on drawings. 3 Dimensions 3.1 Configuration and dimensions The configuration of the accessory and engine or gearbox
21、 flanges is shown in Figure 1. The dimensions shall be as specified in Figure 1 and Table 1; other dimensions indicated in the details in Figure 1 shall be as specified in Figure 2 to Figure 5 and Table 2 to Table 4. Corners are indicated in the figures in accordance with ISO13715. 3.2 Misalignment
22、SeeISO8399-1:1998, subclause6.3. 3.3 Surface roughness The surface roughness values according to ISO4287, specified in the figures in accordance with ISO1302, apply after surface treatment. However, it is permitted to double the value of the surface roughness specified in the figures for the sealing
23、 surfaces for aluminium alloy parts. 3.4 Limit deviations and fits Limit deviations and fits are in accordance with ISO286-2. For values without indication of limit deviations, class ISO2768-m applies. 4 Spigot 4.1 Dimensions The dimensions for the spigot (accessory flange and engine or gearbox flan
24、ges) shall be as shown in Figure 1 and as specified in Table 1. 4.2 Sealing of spigot seal groove The radial compression on the cross-section and the stretch during assembly allowed for in this part of ISO8399 are based on nitrile, fluorocarbon and silicon elastomers having a stretch capability of80
25、% and a hardness value between70 IRHD and80 IRHD. It may be necessary to modify the groove and land dimensions if another material is used. 5 Locating of flanges 5.1 Locating pin The dimensions for locating pins for flanges shall be as specified in Table 2 and as shown in figures 1 and2a) for access
26、ory flanges, and 3 and2b) for engine or gearbox flanges. 5.2 Transfer tube and transfer tube seal The dimensions for transfer tubes and transfer tibe seals for spigot size code greater than or equal to075, shall be as shown in figures 1 and3a) for accessory flanges 1 and3b) for engine or gearbox fla
27、nges. The O-rings for transfer tube seals shall have an inside diameter of(6,9 0,14)mm and a cross-section diameter of(1,8 0,08)mm. NOTEThe O-ring and groove dimensions are in accordance with ISO3601-1 and ISO3601-2:, Fluid power systems O-rings Part2: Design criteria for standard applications. 1) 1
28、) To be published.BSA328-2:1999 2 BSI 04-1999 6 Involute spline 6.1 Characteristics The internal and external involute splines shall be in accordance with ISO4156 and have the following characteristics: number of teeth, Z: according to Table4 and Table5; module, m: according to Table4 and Table5; pr
29、essure angle,: 30; fillet root; tolerance class:5; fit class: H/d 2) ; side fit. 6.2 Lengths and associated dimensions of involute splines 6.2.1 Splines not lubricated by gearbox oil The lengths and associated dimensions of unlubricated splines shall be as specified in Table 3 and as shown in figure
30、s 4 a) for external involute splines on accessory flanges, and 4 b) for internal involute splines on engine or gearbox flanges. 6.2.2 Spline lubricated by the oil of gearbox The lengths and associated dimensions of lubricated involute splines shall be as specified in Table 4 and as shown in figures
31、5 a) for external involute splines on accessory flanges, and 5 b) for lubricated internal involute splines on engine or gearbox flanges. 2) Other values may be defined according to the design of the driving end to obtain a loose fit.BSA328-2:1999 BSI 04-1999 3 Figure 1 Configuration and dimensions o
32、f accessory and engine or gearbox flangesBSA328-2:1999 4 BSI 04-1999 Figure 1 Configuration and dimensions of accessory and engine or gearboxflanges(concluded)BS A 328-2:1999 BSI 04-1999 5 Table 1 Dimensions for accessory and engine or gearbox flanges Dimensions in millimetres Spigot size code d 1 d
33、 2 d 3 d 4 d 5 d 6 d 7 l 1 l 2 l 3 l 4 l 5 l 6 O-ring Groove b 17 0,25 min. Inside diameter Cross section (section diameter) 040 33,62 39,1 68 64 60 42 39,1 25 29,5 32,5 0,29 050 43,82 49,3 78 74 70 52 49,3 13 30 31 14,25 4,55 8,2 42,5 0,36 062 56,12 61,6 91 87 83 64 61,6 36,5 33,5 54,5 0,42 075 69,
34、02 74,5 119 115 109 77 74,5 45,55 36,5 67 0,49 088 82,32 87,8 134 130 124 90 87,8 53 38 80 0,56 106 100,22 105,7 150 146 140 108 105,7 61 41,5 97,5 0,66 3,55 0,1 5,05 118 112,12 117,6 162 158 152 120 117,6 67 44,5 109 0,72 137 131,52 137 184 180 174 139 137 14 78 49 16,75 5,55 10 128 0,83 160 154,12
35、 159,6 204 200 194 162 159,6 88 52,5 150 0,95 186 180,02 185,5 234 230 224 188 185,5 103 59,5 175 1,09 218 209,24 217,62 268 264 258 220 217,62 120 63,5 212 1,29 5,30 0,13 7,35 257 248,24 256,62 309 305 299 259 256,62 140,5 71,5 250 1,49 + 0,36 0 + 0,08 0 +0,7 0 +3 0 00,05 007 , 00,25 0 0,06 00 07 ,
36、 BSA328-2:1999 6 BSI 04-1999 Table 2 Dimensions for accessory and engine or gearbox flanges with locating pins Figure 2 Configuration and dimensions for accessory and engine or gearboxflangeswithlocating pins Dimensions in millimetres Spigot size code d 8 d 9 l 15 l 16 h12 H14 min. 040 050 4,38 5,2
37、7,5 8 062 075 088 106 118 137 6,88 7,7 10,5 11 160 186 218 257 0005 , BSA328-2:1999 BSI 04-1999 7 Figure 3 Configuration and dimensions for transfer tubesBSA328-2:1999 8 BSI 04-1999 Table 3 Lengths and associated dimensions for unlubricated involute splines Figure 4 Configuration and dimensions for
38、unlubricated involute splines Dimensions in millimetres Code Number of teeth Z Module m d 10 d 11 l 7 min. l 8 l 9 min. l 10 min. A 10 1 15,93 14,08 11,5 29 32 B 12 18,3 16,45 13 14,4 30,5 33,5 C 12 20,55 18,7 15 33 36 D 14 25,25 23,12 16,5 36 39 E 16 1,25 27,3 25,17 18 37,5 40,5 F 20 32,03 29,9 21,
39、5 41 44 G 24 36,53 34,4 24,5 44 47 H 24 43,21 41,08 28,5 15,9 48,5 51,5 J 28 48,85 46,72 32 52 55 K 34 1,5 57,77 55,54 38 58 61 L 38 63,85 61,60 42 62 65 M 46 76,75 74,50 50 70 73 + 0,8 0 +0,1 0 +0,2 0BSA328-2:1999 BSI 04-1999 9 Figure 5 Configuration and dimensions for lubricated involute splinesBS
40、 A 328-2:1999 10 BSI 04-1999 Table 4 Lengths and associated dimensions for lubricated involute splines Dimensions in millimetres Code Number of teeth Module d 10 d 11 d 12 d 13 l 7 l 8 l 9 l 10 l 11 l 12 l 13 l 14 b r 1 r 2 O-ring Z m f7 min. min. min. min. min. max. min. max. Ref. a Section diamete
41、r A 10 1 15,93 14,04 14,04 9,9 11,5 29 32 16,5 22,6 31 B0095A B 12 18,3 16,4 16,4 12,26 13 14,4 30,5 33,5 18 24,1 3,85 32 0,4 0,8 0,1 0,3 B0118A 2,65 0,09 C 20,55 18,7 18,7 14,56 15 33 36 20,5 26,6 35 B0140A D 14 25,25 23,1 23,1 17,62 16,5 36 39 22 29,3 37 C0170A E 16 1,25 27,22 25,2 25,2 19,72 18 3
42、7,5 40,5 23,5 30,8 39 C0190A F 20 32 29,9 29,9 24,42 21,5 41 44 27 34,3 42 C0230A G 24 36,5 34,4 34,4 28,92 24,5 44 47 30 37,3 45 C0280A H 24 43,25 41,1 41,1 35,62 28,5 15,9 48,5 51,5 34,5 41,8 5,05 50 0,4 0,8 0,1 0,3 C0345A 3,55 0,10 J 28 48,85 46,7 46,7 41,22 32 52 55 38 45,3 53 C0400A K 34 1,5 57
43、,8 55,6 55,6 50,12 38 58 61 44 51,3 59 C0487A L 38 63,85 61,6 61,6 56,12 42 62 65 48 55,3 63 C0545A M 46 76,75 74,5 74,5 69,02 50 74 77 60 67,3 75 C0670A a In accordance with ISO3601-1. b The shaft shear section shall not be located in this area or in other areas where its failure could jeopardize t
44、he fluid sealing feature. 005 , + 0,2 0 0025 , + 0,2 0 0025 , +0,07 0 0005 , +0,08 0 0006 , blankBS A328-2: 1999 ISO 8399-2: 1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the U
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