1、CEN EN*IS0*7083 94 m 3404589 OL09782 b55 m BRITISH STANDARD Technical drawings - Symbols for geometrical tolerancing Proportions and dimensions The European Standard EN IS0 7083 : 1994 has the status of a British Standard BS EN IS0 7083 : 1995 BS 308 : Section 3.6 : 1995 CEN EN*IS0*7083 94 3404589 0
2、109783 591 BS EN IS0 7083 : 1995 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee TDW4, Engineering drawing practice, upon which the following bodies were represented: Atomic Weapons Establishment British Gas pic British S
3、tan Generalities, definitions, s yrnbols. indicetion on drawings. 1 ) symbols for tolerance characteristics and additional IS0 3098/1, Technical drawings - lettering - Part 1 : symbols (see IS0 1101) are always to be depicted as shown Currently used characters. - in figures 1 to 21. li Ar present at
4、 the stage of draft. (Revisiion of ISO/A 1101/1-1969.) CEN EN*ISO*083 74 3404589 0307789 TOT Page 4 EN IS0 7083 : 1994 Figure 1 - Straightness Figure 5 - Profile of any line Figure 2 - Flatness Figure 4 - Cylindricity Figure 6 - Profile of any surface CEN EN*ISO*7083 94 3404589 0307790 721 = Page 5
5、EN IS0 7083 : 1994 Figure 7 - Parallelism Figure 8 - Perpendicularity Figure 9 - Angularity Figure 11 - Concentricity and coaxiality Figure 12 - Symmetry CEN EN*ISO*083 94 3404589 0309793 bb8 W Page 6 EN IS0 7083 : 1994 Figure 13 - Simple runout f Figure 14 - Total runout Figure 15 - Indication of t
6、oleranced feature (by reference letter) Figure 16 - Indication of datum (direct) _ CEN EN*ISO*7083 94 3404589 0309792 5T4 Page 7 EN IS0 7083 : 1994 I_ D Figure 18 - Datum target (IS0 5459) - CEN EN*IS0*7083 94 3404589 O309793 430 Page 8 EN IS0 7083 : 1994 b) a) Figure 19 - Theoretically exact dimens
7、ion a) Figure 20 - Projected tolerance zone a) Figure 21 - Maximum material condition CEN EN*IS0*703 94 3404589 OL09794 377 9 Page 9 EN IS0 7083 : 1994 Characteristic Recommended dimensions Heightof frame(H)* 5 7 10 14 a) 28 40 Height of characters (h) 2.5 3,5 5 7 10 14 20 Diameter D) * 10 14 a) 28
8、405 80 Thickness of line id) 0,25 0.35 0.5 0.7 1 1,4 2 L 5 Dimensions 5.1 Recommended dimensions of the symbols with lettering type A are specified in table 1, those for use with lettering type B in table 2. Table 1 - Lettering type A Dimensions in millimetres Height of characters (h) Diameter 10 *
9、14x1 m4o 5680 Thickness of line d) 0.25 0.35 0.5 0.7 1.4 5.2 The recommended widths of the frame should be : - first compartment, equal to height of frame (HI; - tion; second compartment, to suit the length of the inscrip- - the width of the reference letter (or lettercl. third and subsequent compar
10、tments, if required, to suit The distances between the vertical strokes of the compart- ments and the inscriptions shall be at least twice the thickness of lines, with a minimum of 0,7 mrn. CEN EN*IS0*7083 94 m 3404589 0109795 203 Page 10 EN IS0 7083 : 1994 6 Examples Figure Pa) - Lettering B, verti
11、cal CEN EN*ISO*7083 94 = 3404589 0309796 L4T Page 11 EN IS0 7083 : 1994 Figure 23a) - Lettering 8. vertical CEN EN*IS0*7083 94 = 3404589 0309797 O86 BS EN IS0 7083 : 1995 List of references See national foreword. BS EN IS0 7083 : 1995 BS 308 Section 3.6 : 1995 BSI 389 Chiswick High Road London w4 4A
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