DIN ISO 7648-1988 Flywheel housings for reciprocating internal combustion engines nominal dimensions and tolerances identical with ISO 7648 1987《往复式内燃机 飞轮壳体 公称尺寸和公差》.pdf
《DIN ISO 7648-1988 Flywheel housings for reciprocating internal combustion engines nominal dimensions and tolerances identical with ISO 7648 1987《往复式内燃机 飞轮壳体 公称尺寸和公差》.pdf》由会员分享,可在线阅读,更多相关《DIN ISO 7648-1988 Flywheel housings for reciprocating internal combustion engines nominal dimensions and tolerances identical with ISO 7648 1987《往复式内燃机 飞轮壳体 公称尺寸和公差》.pdf(10页珍藏版)》请在麦多课文档分享上搜索。
1、DC 621.43-562 : 629.1 1 DEUTSCHE NORM October 1988 Flywheel housings for reciprocating internal combustion engines Nominal dimensions and tolerances (IS0 7648 : 1987) DIN IS0 7648 - Hubkolben-Verbrennungsmotoren - Schwungradgehuse - Mae (IS0 7648 : 1987) This standard incorporates International Stan
2、dard IS0 7648 : 1987 Flywheel housings for reciprocating internal combustion engines - Nominal dimensions and tolerances. A comma is used as the decimal marker. National foreword This standard has been prepared by ISO/TC 22. The responsible German body involved in its preparation was the Normenaussc
3、hu Kraftfahrzeuge (Road Vehicle Engineering Standards Committee). IS0 Standard comprises 8 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN IS0 7648 : 1988-1 Y Deutsches Institut fr Normung e. V., Berlin. wth Verlag GmbH, D-10772 Berlin, has the exclusiv
4、e right of sale for German Standards (DIN-Normen). English price group 08 Sales No. 0408 02.99 COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesCOPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 1
5、IS0 7648 : 1987 Flywheel housings for reciprocating internal combustion engines Nominal dimensions and tolerances Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standard
6、s is normally carried out through IS0 technical 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, govern- mental and non-governmental, in liaison with ISO, also tak
7、e part in the work. Draft International Standards adopted by the technical cornmittees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. They are approved in accordance with IS0 procedures requiring at least 75 % approval by the m
8、ember bodies voting. International Standard IS0 7648 was prepared by Technical Committee ISO/TC 22, Road vehicles. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition,
9、unless dtnerwise stated. COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 2 IS0 7648 : 1987 1 This International Standard specifies the nominal dimensions and tolerances of flywheel housings for reciprocating internal combustion engines, in part
10、icular those which affect inter- changeability with mating parts. It applies to reciprocating internal combustion engines except engines for aircraft and passenger cars. Flywheel housings of size codes 1 to 4 are recommended for commercial vehicles and buses. Scope and field of application 2 Referen
11、ces IS0 273, Fasteners - Clearance holes for bolts and screws. IS0 1101, Technical drawings - Geometrical tolerancing - Tolerancing of form, orientation, location and run-out - Generalities, definitions, s yrnbols, indications on drawings. IS0 7649, Commercial vehicles - Clutch housings for internal
12、 combustion engines - Nominal dimensions and tolerances. 3 Nominal dimensions and tolerances 3.1 Flywheel housing See figure 1 and table 1. 1) At present at the stage of draft. COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 3 IS0 7648 : 1987 T
13、able 1 - Flywheel housing dimensions and tolerances Size code M o1 O0 O 112 1 2 3 4 5 6 nom. 1 245 1010.00 787.40 47,70 584,20 511,18 44793 409.58 361.95 314.32 266.70 A t01. + 0.25 + 0.25 O + 0,25 O + 0.25 O + 0.20 O + 0,13 O + 0.13 O + 0.13 O + 0.13 O + 0,13 O f 0.13 O Run-out lassernbled flywheel
14、 housing) f not applicable 0,47 0.3 0,35 0,31 0.27 0.25 0.25 0,25 0.25 Dimensions in millimetres B nom. 1400 1 165 883 71 1 648 553 489 451 404 356 308 D* min. 10 10 8 8 8 8 0 8 8 8 8 Dimension D relates to flywheel housings without rubber sealing. However, this dimension may be increased if a rubbe
15、r seal is necessary NOTE - Run-out tolerances t shall be measured on the assembled engine mounted on its supports in accordance with the annex. (See IC0 1101 for definition of run-out.) Dimensions in millimetres X U e X I Figure 1 - Flywheel housing COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.-
16、 EnglishLicensed by Information Handling ServicesPage 4 IS0 7648 : 1987 3.2 Bolt or screw spacing and size 3.2.1 Dimensions and tolerances See figure 1 and table 2. code o2 o1 00 O 1 I2 1 2 3 4 5 6 Table 2 - Tapped holes and bolt or screw spacing and dimensions Number 24 24 16 16 12 12 12 12 12 8 8
17、Tapped holes Size I Size M16 M16 M12 M12 M12 M10“ M10 M10 M10 M10 M10 Recommended thread engagement C nom. mm (see figures 1 and 21 1340,oo 1 105,OO 850.90 679.45 619.12 5302 466.72 428,62 381,oO 333,38 285.75 M12 may be used for high engine torque applications NOTE - 24 tapped holes are optional fo
18、r aluminium flywheel housings of size code 1, 3.2.2 Spacing Tapped holes shall be spaced equally on each side of the vertical and horizontal axis lines as shown in figure 2. + a) 8 tapped hole spacing Dimensions in millimetres + P b) 12 tapped hole spacing 4 c) 16 tapped hole spacing di 24 tapped ho
19、le spacing Figure 2 - Bolt or screw hole spacing COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 5 IS0 7648 : 1987 o2 o1 00 O 112 1 2 3 4 5 6 4 Relationship of pilot bearing bore to flywheel housing The depth of the pilot bearing bore (see E in
20、 figure 3) extends from the flywheel housing face to a shoulder in the flywheel, to a shoulder within the crankshaft or to the crankshaft flange face. 265 - 265 100 133,4 100 133,4 100 133,4 100 - 112“ 133.4 100 112“ 100 - 100 - 71 - 71 - Table 3 - Depth of pilot bearing bore Dimensions in millimetr
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