1、BRITISH STANDARD BS 3092:1973 Specification for Main friction clutches, main power-take-off assemblies and associated attachments for internal combustion engines UDC 621.43 23:621.82/.83BS3092:1973 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committee,
2、was published under the authorityof the Executive Boardon 28 February1973 BSI 02-2000 First published February 1959 First revision February 1973 The following BSI references relate to the work on this standard: Committee reference MEE/137, MEE/137/2 Draft for comment 71/30098 ISBN 0 580 07563 X Co-o
3、perating organizations The Mechanical Engineering 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 department and scientific and
4、industrial organizations marked with an asterisk 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 Engineering Equipment Users Association Association of Consultin
5、g Engineers Gas Council Association of Hydraulic Equipment Institution of Civil Engineers Manufacturers Ltd.* Institution of Gas Engineers Association of Mining Electrical and Institution of Heating and Ventilating Mechanical Engineers Engineers British Compressed Air Society Institution of Mechanic
6、al Engineers* British Electrical and Allied Manufacturers Institution of Mechanical Engineers Association (Automobile Division) British Gear Manufacturers Association Institution of Plant Engineers British Internal Combustion Engine Institution of Production Engineers Manufacturers Association* Loco
7、motive and Allied Manufacturers British Mechanical Engineering Confederation Association of Great Britain British Pump Manufacturers Association London Transport Executive British Steel Industry Machine Tool Trades Association Crown Agents for Oversea Governments and Ministry of Defence Administrati
8、ons Ministry of Defence, Army Department* Department of Employment (H.M. Factory National Coal Board Inspectorate) National Physical Laboratory (Department of Department of the Environment Trade and Industry) Department of Trade and Industry Process Plant Association Department of Trade and Industry
9、 National Royal Institute of British Architects Engineering Laboratory Telecommunications Engineering Electricity Council, The Central Electricity Manufacturing Association Generating Board and the Area Boards in Water Tube Boilermakers Association England and Wales Diesel Engineers and Users Associ
10、ation Individual manufacturers Society of Motor Manufacturers and Traders Ltd. Amendments issued since publication Amd. No. Date of issue CommentsBS3092:1973 BSI 02-2000 i Contents Page Co-operating organizations Inside front cover Foreword iii 1 General 1 2 Main clutches 2 3 Main power-take-off ass
11、emblies 3 4 Flywheel-spigoted couplings 3 5 Housings 4 Figure 1 Spline details 4 Figure 2 Dowels and dowel holes 5 Figure 3 Single plate, coil spring-engaged clutches (flat face, equally spaced fixing holes and dowel location) 6 Figure 4 Flywheels for coil spring engaged clutches (flat face, equally
12、 spaced fixing holes and dowel location) 7 Figure 5 Single plate coil spring-engaged clutches (flat face, unequally spaced fixing holes and dowel location) 8 Figure 6 Flywheels for coil spring-engaged clutches (flat face, unequally spaced fixing holes and dowel location) 9 Figure 7 Single plate coil
13、 spring-engaged clutches inset face, equally spaced fixing holes (8 & 12) and dowel location 10 Figure 8 Flywheels for coil spring-engaged clutches (inset face, equally spaced fixing holes and dowel location) 11 Figure 9 Single plate, coil spring-engaged clutches (inset face, equally spaced fixing h
14、oles and spigot location) 13 Figure 10 Flywheels for coil spring-engaged clutches (inset face, equally spaced fixing holes and spigot location) 14 Figure 11a Diaphragm spring clutches 6 1 / 2 , 7 1 / 2 , 8 1 / 2 , 9 1 / 2and 10 1 / 2inch sizes 15 Figure 11b Diaphragm spring clutches 12, 13, 14 and 1
15、5 inch sizes 16 Figure 12 Flywheel for 6 1 / 2inch diameter diaphragm spring clutch (flat face, unequally spaced fixing holes and dowel location) 18 Figure 13 Flywheels for 7 1 / 2 , 8 1 / 2 , 9 1 / 2and 10 1 / 2inch diameter diaphragm springclutches (flat face, equally spaced fixing holes and dowel
16、 location) 19 Figure 14 Flywheels for 12 and 13 inch diameter diaphragm spring clutches(flat face, unequally spaced fixing holes and dowel location) 20 Figure 15 Flywheels for 14 and 15 inch diameter diaphragm spring clutches(inset face, equally spaced fixing holes and dowel location) 21 Figure 16 (
17、Flat face) 22 Figure 17 (Inset face) 22 Figure 18 Friction plate cam-operated clutches 23 Figure 19 Flywheels for friction plate, cam-operated clutches 24 Figure 20 Power-take-off assemblies (single and multi-plate) 25 Figure 21 Flywheels for power-take-off assemblies (single and multi-plate) 27 Fig
18、ure 22 Flywheels for flywheel-spigoted couplings and industrial clutches 30 Figure 23 Mating spigots for direct flywheel mounted clutches and flywheel-spigoted couplings 32 Figure 24 Engine flywheel housings 33 Figure 25 Clutch housings 34 Table A Flywheel data 2 Table 1 Spline details 4BS3092:1973
19、ii BSI 02-2000 Page Table 2a Dimensions of dowels and dowel holes: coil spring clutches 5 Table 2b Dimensions of dowels and dowel holes: diaphragm spring clutches 5 Table 3 Dimensions of single plate coil spring-engaged clutches (flat face, equally spaced fixing holes and dowel location) 6 Table 4 D
20、imensions of flywheels for coil spring-engaged clutches (flat face, equally spaced fixing holes and dowel location) 7 Table 5 Dimensions of single plate coil spring-engaged clutches (flat-face, unequally spaced fixing holes and dowel location) 8 Table 6 Dimensions of flywheels for coil spring-engage
21、d clutches (flat face, unequally spaced fixing holes and dowel location) 9 Table 7 Dimensions of single plate coil spring-engaged clutches (inset face, equally spaced fixing holes and dowel location) 12 Table 8 Dimensions of flywheels for coil spring-engaged clutches (inset face, equally spaced fixi
22、ng holes and dowel location) 12 Table 9 Dimensions of single plate coil spring-engaged clutches (inset face, equally spaced fixing holes and spigot location) 13 Table 10 Dimensions for flywheels for coil spring-engaged clutches (inset face, equally spaced fixing holes and spigot location) 14 Table 1
23、1 Dimensions of diaphragm spring clutches 17 Table 12 Dimensions of flywheels for 6 1 / 2inch diameter diaphragm springclutch (flat face, unequally spaced fixing holes and dowel location) 18 Table 13 Dimensions of flywheels for 7 1 / 2 , 8 1 / 2 , 9 1 / 2and 10 1 / 2inch diameter diaphragm spring cl
24、utches (flat face, equally spaced fixing holes and dowel location) 19 Table 14 Dimensions of flywheels for 12 and 13 inch diameter diaphragm spring clutches (flat face, unequally spaced fixing holes and dowel location) 20 Table 15 Dimensions of flywheels for 14 and 15 inch diameter diaphragm spring
25、clutches (inset face, equally spaced fixing holes and dowel location) 21 Table 16 Additional dimensions for multi-plate, coil spring-engaged and cam-operated clutches (flat face) 22 Table 17 Additional dimensions for multi-plate, coil spring-engaged and cam-operated clutches (inset face) 22 Table 18
26、 Dimensions of friction plate cam-operated clutches 23 Table 19 Dimensions of flywheels for friction plate cam-operated clutches 24 Table 20 Dimensions of power-take-off assemblies (single and multi-plate) 26 Table 21 Dimensions of flywheels for power-take-off assemblies (single and multi-plate) 28
27、Table 22 Dimensions of flywheels for flywheel-spigoted couplings andindustrial clutches 29 Table 23 Mating spigot dimensions for direct flywheel mounted clutches and flywheel-spigoted couplings 31 Table 24 Dimensions of engine flywheel housings 33 Table 25 Dimensions of clutch housings 34 Publicatio
28、ns referred to Inside back coverBS3092:1973 BSI 02-2000 iii Foreword This British Standard has been prepared under the authority of the Mechanical Engineering Industry Standards Committee to facilitate the production and interchange of main friction clutches, main power-take-off assemblies and assoc
29、iated attachments for internal combustion engines, excluding aircraft engines. In general, dimensions specified are based on those of components in current use, but in certain instances they have been adjusted to suit applicable standard practice. The need for interchangeability has necessitated con
30、sideration of current American practice and where necessary, for instance on flywheel housings, clutch housing spigots, clutch splines, main power-take-off assemblies and cam-operated friction plate clutches, certain American Standard dimensions have been adopted. The principal changes in this revis
31、ion of BS3092:1959 include the up-dated dimensions for single and multi-plate coil spring operated clutches and the introduction of details of diaphragm spring clutches. Because the identification code for clutches is no longer used, reference to it in the tables has been deleted. This standard does
32、 not specify dimensions for shaft couplings of rigid and flexible types, neither does it specify dimensions for flywheel attachments to crankshafts. Automatic transmissions are not included. NOTEWhere metric equivalents are given the figures in imperial units are to be regarded as the standard. The
33、metric conversions are approximate. More accurate conversions should be based on BS2856, “Precise metric conversions of inch and metric sizes on engineering drawings”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsibl
34、e 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 iv, pages1to 34, an inside back cover and a back cover. This standard has been upda
35、ted (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankBS3092:1973 BSI 02-2000 1 1 General 1.1 Scope This British Standard specifies envelope, attachment and certain other dimensions of flywheel-mounted main
36、drive components for internal combustion engines (excluding aircraft engines). In Section5, “Housings”, only dimensions relevant to the mating of the components are specified. NOTEThe titles of the British Standards referred to in this standard are listed on the inside back cover. 1.2 Splines Spline
37、s for clutch hubs shall be as specified inFigure 1 andTable 1. For splined hubs of driven plates above7 in nominal diameter, two sizes of splines are specified for each size of certain clutches to cater for light and heavy duty uses. Subsequent to the publication of BS3550, a suitable range of invol
38、ute splines may be used as an alternative to the10spline series now specified. 1.3 Spigot (pilot) bearings The nominal dimensions for spigot (pilot) bearings specified in this standard (which may be located in flywheels, crankshafts or separate housings), are those for single-row ball or roller bear
39、ings which conform to BS292. NOTEWhen other types of bearings are used, it is recommended that in the interest of interchangeability their bores be such as to accommodate clutch-shaft spigots made to suit the specified ball or roller bearings. It is recommended that, in order to accept the greater l
40、ength of spigot needed for plain type bearings, flywheels and crankshafts of engines using spring-engaged clutches up to and including10 in nominal diameter be machined to accommodate a bearing2 1 / 2times the width of those ball and roller bearings specified in the relevant tables of this standard.
41、 1.4 Dowels Dimensions of stepped dowels shall be as specified inFigure 2 andTable 2a andTable 2b, to ensure: 1) Positive retention of the dowels in the flywheel when the clutch cover is in position. 2) Asymmetrical assembly of clutch to flywheel. Flywheels shall be balanced with dowels in situ. Whe
42、n measured on the assembled engine, clutch dowels shall be co-axial and equidistant from the crankshaft centre line within0.004in. 1.5 Tolerances In order to ensure interchangeability and correct functioning, tolerances shall be as shown in the relevant tables. Tolerances specified in BS1916 have be
43、en incorporated wherever their use would not preclude interchangeability between US and UK products. The eccentricity and deviation from squareness of the parts listed inTable A, when measured relative to the crankshaft centre-line, shall not exceed the values specified inTable A.BS3092:1973 2 BSI 0
44、2-2000 Table A Flywheel data 2 Main clutches 2.1 Friction plate spring-engaged single plate clutches The envelope and attachment dimensions for friction plate spring-engaged single plate clutches and the relevant flywheel dimensions shall be as given in the following tables and figures: Table 3, Fig
45、ure 3 Single plate coil spring-engaged clutches (flat face, equally spaced fixing holes and dowel location). Table 4, Figure 4 Flywheels for coil spring-engaged clutches (flat face, equally spaced fixing holes and dowel location). Table 5, Figure 5 Single plate coil spring-engaged clutches (flat fac
46、e, unequally spaced fixing holes and dowel location). Table 6, Figure 6 Flywheels for coil spring-engaged clutches (flat face, unequally spaced fixing holes and dowel location). Table 7, Figure 7 Single plate coil spring-engaged clutches (inset face, equally spaced fixing holes and dowel location).
47、Table 8, Figure 8 Flywheels for coil spring-engaged clutches (inset face, equally spaced fixing holes and dowel location). Table 9, Figure 9 Single plate coil spring-engaged clutches (inset face, equally spaced fixing holes and spigot location). Table 10, Figure 10 Flywheels for coil spring-engaged
48、clutches (inset face, equally spaced fixing holes and spigot location). Table 11, Figure11 Diaphragm spring clutches. Table 12, Figure 12 Flywheel for6 1 / 2inch diaphragm spring clutch (flat face, unequally-spaced fixing holes and dowel location). Table 13, Figure 13 Flywheels for 7 1 / 2inch, 8 1
49、/ 2inch, 9 1 / 2inch and 10 1 / 2inch diaphragm spring clutches (flat face, equally spaced fixing holes and dowel location). Table 14, Figure 14 Flywheels for 12 inch and 13 inch diaphragm spring clutches (flat face, unequally-spaced fixing holes and dowel location). Table 15, Figure 15 Flywheels for 14 inch and 15 inch diaphragm spring clutches (inset face, equally-spaced fixing holes and dowel location). Type of clutch coupling or power-take-off assembly Ec
