1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards GENERAL TOLERANCES Do Not Use on New Programs. Being Replaced by Global Design Standards EDS-A-1101 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 4 (Superceded) EDS-A-1101GENERAL TOLERANCES PAGE: 1/11
2、ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 4 GM DAEWOO Auto & Technology Note: This standard may be applied only for current project drawings generated by CATIA. It is Superceded for all future projects and replaced by Global Design Standards. 1. SCOPE This standard specifies the
3、general tolerance, which is not indicated in GM DAEWOO Auto & Technology Company (hereinafter referred to as the “GMDAT“) drawings. 2. DEFINITION The general tolerance is specified to indicate the allowable tolerance for workers and help make drawings simply. The general tolerance consists of the ge
4、neral dimensional tolerance and general geometric tolerance. However, if necessary to classify, both of them may be called general tolerances. 3. CLASSIFICATION SYMBOL AND INDICATION 3.1. Classification: It is classified as in the following table. Table 1. Classification of general tolerance Symbol
5、Tolerances Symbol TolerancesC Casting tolerance MG Machining geometricF Forging tolerance P Sheeting forming toleranceL Precise casting tolerance R Rubber forming toleranceM Machining tolerance S Plastic forming toleranceEx) Casting tolerance: EDS-A-1101-C 3.2. Indication: In principle, the general
6、tolerance shall be indicated in the dimension column of the title block (Fig. 1). When inevitable, details (casting and machining tolerance) are entered in the note column (dimension column in Fig. 1) and EDS No. is indicated. EDS-A-1101-M When machining tolerance is used EDS-A-1101-C.M When many to
7、lerances are used. Figure 1. Example of general tolerance ExampleEDS-A-1101GENERAL TOLERANCES PAGE: 2/11 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 4 GM DAEWOO Auto & Technology 4. GENERAL CASTING TOLERANCE 4.1. Scope This standard specifies the general tolerance of cast parts wit
8、h dimensions from 1 to 1000mm whose tolerance is not indicated in drawings. This standard applies to the cast surface of parts made of high pressure die casting, shell molding or sand molding portions. 4.2. Allowable tolerance Table 2 and 3 shows the general casting tolerance. Table 2. Allowable tol
9、erance except for portions shown in Table 3 Unit : mm High pressure die casting Reference dimensionLengthInside diameterOutside diameterShell molding Sand molding1 to 4, both incl. 0.1 0+0.2 -0.20 0.15 0.3 Over 4 16 or less 0.2 0+0.3 -0.30 0.3 0.5 Over 16 63 or less 0.3 0+0.4 -0.40 0.4 0.7 Over 63 2
10、50 or less 0.5 0+0.8 -0.80 0.7 1.2 Over 250 1000 or less 0.8 0+1.2 -1.20 1.0 2.0 Table 3. Allowable tolerance of portions relating to moving die Unit : mm Reference dimension Die casting Shell molding Sand molding1 to 4, both incl. 0.15 0.4 0.8 Over 4 16 or less 0.3 0.5 1.0 Over 16 63 or less 0.4 0.
11、6 1.5 Over 63 250 or less 0.6 1.0 1.8 Over 250 1000 or less 1.0 1.5 2.5 (Note) Portions relating to moving die (1) Dividing section in case of high pressure die casting (2) Dividing section and core in case of shell molding (3) Dividing section, core and lower die in case of sand molding EDS-A-1101G
12、ENERAL TOLERANCES PAGE: 3/11 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 4 GM DAEWOO Auto & Technology 5. GENERAL FORGING TOLERANCE 5.1. Scope This standard specifies the allowable tolerance of forged parts with dimensions from 1 to 250mm whose tolerance is not indicated in drawing
13、s. 5.2. Allowable tolerance Table 4 shows the allowable forging tolerance. Table 4. Allowable tolerance Unit : mm Reference dimension Thickness Length Deviation 1 to 4, both incl. - 0.2 + 0.4 0.3 Over 4 16 or less - 0.3 + 0.6 0.4 Over 16 63 or less - 0.5 + 1.0 0.5 Over 63 250 or less - 0.5 + 1.5 1.0
14、 Within 0.5(Note) 1. Thickness here means dimension that crosses die dividing surface. 2. Length here means dimension that does not affect die dividing surface. 3. Deviation means error resulting from dimensional variation between upper and lower dies. 4. The material to which this standard applies
15、is SF, SC (carbon steel for casting and forging) and materials equivalent to them. EDS-A-1101GENERAL TOLERANCES PAGE: 4/11 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 4 GM DAEWOO Auto & Technology 6. GENERAL PRECISE CASTING TOLERANCE 6.1. Scope This standard specifies the allowable
16、 tolerance of precise cast parts with dimensions from 0.3 to 350mm whose tolerance is not represented by figures or symbols in drawings. 6.2. Allowable tolerance Table 5 and 6 show the allowable tolerance of precise casting Table 5. Diameter, length, round Unit : mm Reference dimension Diameter, len
17、gth Rounding 0.3 to 1, both incl. 0.10 0.25 Over 1 4 or less 0.15 0.30 Over 4 16 or less 0.20 0.30 Over 16 30 or less 0.25 0.40 Over 30 50 or less 0.30 0.40 Over 50 75 or less 0.40 0.50 Over 75 100 or less 0.50 0.70 Over 100 150 or less 0.60 1.20 Over 150 250 or less 1.00 2.00 Over 250 350 or less 1
18、.20 3.00 Table 6. Angle and roughness Angle Surface roughness1 7 m or less (Ra)(Note) 1. When more accurate tolerance is required, the manufacturer and the designer shall consult with each other and indicate the agreed tolerance in drawings. 2. To machined parts, the general tolerance in EDS-A-1101-
19、M is applied. EDS-A-1101GENERAL TOLERANCES PAGE: 5/11 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 4 GM DAEWOO Auto & Technology 7. GENERAL MACHINING TOLERANCE 7.1. Scope This standard specifies the allowable tolerance of precise cast parts with dimensions from 0.3 to 1000mm and all
20、owable tolerance of the machined part which is not represented by figures or symbols in drawings. In case the geometrical tolerance is required, follow EDS-A-1101-M for classification symbols, comma “MG“. (Example: EDS-A-1101-M, MG) 7.2. Allowable tolerance Table 7 and 8 shows the allowable toleranc
21、e of machined parts. Table 7. Allowable tolerance of diameter, length and corner Unit : mm Inside diameter Corner Reference dimension Outside diameter Boring Drilling LengthChamfer Round(R)1 or less - 0.10 0+ 0.1 0+ 0.2 0.1 0.25 0.25Over 1 4 or less - 0.10 0+ 0.1 0+ 0.2 0.1 0.5 0.25Over 4 16 or less
22、 - 0.150 0+ 0.15 0+ 0.4 0.15 0.5 0.5 Over 16 63 or less - 0.20 0+ 0.2 0+ 0.6 0.2 Over 63 250 or less - 0.40 0+ 0.4 0.4 Over 250 1000 or less - 0.60 0+ 0.6 0.6 Table 8. Allowable tolerance of angle Reference dimension Angle 4 or less 130Over 4 16 or less 10Over 16 32 or less 45Over 32 63 or less 30Ov
23、er 63 250 or less 20Over 250 1000 or less 15(Note) 1. When length or diameter after allowable tolerance is subtracted is smaller than 0, the minimum allowable limit shall be 0. 2. For chamfering of round holes, the chamfering tolerance in Table is applied to the minimum chamfered portion. Figure 2 E
24、DS-A-1101GENERAL TOLERANCES PAGE: 6/11 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 4 GM DAEWOO Auto & Technology Figure 3 (Note) 1. In Table 8, the reference dimension applies to the shorter portion. (AB in Fig. 3) 2. Angular tolerance (1) It does not apply to length without angle(
25、) and chamfering represented by a symbol (chamfer C2 in Fig. 3) (2) It applies only to chamfering represented with angle, length or diameter. In this case, the allowable tolerance of corner in Table 7 applies to length (EF in Fig. 3) and diameter. EDS-A-1101GENERAL TOLERANCES PAGE: 7/11 ISSUED DATE:
26、 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 4 GM DAEWOO Auto & Technology 8. GENERAL SHEET FORMING TOLERANCE 8.1. Scope This standard specifies the general tolerance of sheet formed parts with dimensions from 1 to 1000mm and allowable tolerance of sheet formed parts which is not represented by
27、 figures or symbols in drawings Sheet formed parts here include weld parts. 8.2. Allowable tolerance Table 9 and 10 shows the allowable tolerance of sheet formed parts. Table 9. Sheet forming without welding Unit : mm Inside diameterReference dimension Length t 2.3 2.3 t 1 to 4, both incl. 0.3 0 + 0
28、.2 0 + 0.4 Over 4 16 or less 0.5 0 + 0.4 0 + 0.8 Over 16 63 or less 0.7 0 + 0.6 0 + 1.2 Over 63 250 or less 1.2 0 + 1.0 0 + 2.0 Over 250 1000 or less 2.0 0 + 1.6 0 + 3.2 Note) t : sheet thicknessTable 10. Sheet forming with welding Unit : mm Reference dimension Length 1 to 4, both incl. 0.4 Over 4 1
29、6 or less 0.8 Over 16 63 or less 1.2 Over 63 250 or less 2.0 Over 250 1000 or less 3.2 EDS-A-1101GENERAL TOLERANCES PAGE: 8/11 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 4 GM DAEWOO Auto & Technology 9. GENERAL RUBBER FORMING TOLERANCE 9.1. Scope This standard specifies the genera
30、l tolerance of formed rubber parts whose tolerance is not represented by figures or symbols in drawings. 9.2. Allowable tolerance Table 11 shows the allowable tolerance of rubber forming. Table 11. Allowable tolerance Unit : mm Reference dimension Casting Extrusion & others 3 or less 0.3 0.4 Over 3
31、6 or less 0.4 0.5 Over 6 10 or less 0.5 0.6 Over 10 18 or less 0.6 0.8 Over 18 30 or less 0.8 1.0 Over 30 50 or less 1.0 1.5 Over 50 80 or less 1.2 2.0 Over 80 120 or less 1.4 2.5 Over 120 180 or less 1.6 3.0 Over 180 250 or less 2.0 4.0 Over 250 315 or less 2.5 5.0 Over 315 400 or less 3.0 6.0 Over
32、 400 500 or less 3.5 7.0 Over 500 0.8 % 1.5 % Note) the tolerance with this mark is expressed in error percentage to the basic dimension. EDS-A-1101GENERAL TOLERANCES PAGE: 9/11 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 4 GM DAEWOO Auto & Technology 10. GENERAL PLASTIC MOLDING TO
33、LERANCE 10.1. Scope This standard specifies the general tolerance of plastic molded parts with dimensions from 1 to 1000mm and allowable tolerance of plastic molded parts which is not represented by figures or symbols in drawings. This, however, does not apply to polyethylene parts. 10.2. Allowable
34、tolerance Table 12 shows the general tolerance of plastic molded parts made of Urea, Acrylic Resin, Vinyl Chloride, Phenol, Polystyrene, Nylon, Polyester, etc. Table 12. Allowable tolerance Unit : mm DiameterReference dimension Length Inside diameter Outside diameter1 to 4, both incl. 0.1 0 + 0.2 -
35、0.2 0 Over 4 16 or less 0.2 0 + 0.3 - 0.3 0 Over 16 63 or less 0.3 0 + 0.4 - 0.4 0 Over 63 250 or less 0.5 0 + 0.8 - 0.8 0 Over 250 1000 or less 0.8 0 + 1.2 - 1.2 0 EDS-A-1101GENERAL TOLERANCES PAGE: 10/11 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 4 GM DAEWOO Auto & Technology 11
36、. GENERAL MACHINE GEOMETRIC TOLERANCE 11.1. Scope This standard specifies the general geometric tolerance for machining part sizes of 1000mm or less, which are not specified geometric tolerance with a numerical value and a symbol in drawings, excluding tolerances of angularity, concentricity, profil
37、e and position. 11.2. Tolerance classification and indications If this standard applies, a class shall be selected according to requirement on function before nothing the indication as shown in Figure 4 below. If a note for the indication with or without a class is omitted, the general tolerance of
38、Table 1 shall be applied. 11.3. Geometric tolerances 11.3.1. The tolerances of straightness, flatness, runout, symmetricity and perpendicularity are shown in Table 13. 11.3.2. The roundness tolerance is equal to the numerical value of Table 13, size tolerances indicated in drawings or general size t
39、olerance according to EDS-A-1101-M, whichever is the smaller. (See the Explanation below). 11.3.3. The parallelism tolerance is equal to the numerical value of Table 13, size tolerances indicated in drawings or general size tolerance according to EDS-A-1101-M, whichever is the larger. (See the Expla
40、nation below). Explanation) Note) General tolerance: EDS-A-1101-M, MG1 Figure 4. Applicable example of this standard In above Figure, the roundness and parallelism tolerance for 30 are 0.1 and 0.2, respectively, because general size tolerance for 30 is 0.2 according to EDS-A-1101-M, which is larger
41、than corresponding tolerance in Table 13, 0.1 and 0.08. 11.3.4. For tolerances on relative features, unless otherwise specified, the longer of two features shall apply as datum. If feature lengths are equal, either may apply as the datum. 11.3.5. General tolerance on cylindricity and concentricity a
42、re not specified. The deviations of cylindricity and concentricity compose of three components (roundness, straightness and parallelism) and two components (roundness and runout), respectively. Therefore, both of them could be controlled dependently by meeting the general tolerances specified in thi
43、s standard. If required to be smaller than the combined effect of general tolerances on the components mentioned above, individual tolerance of cylindricity and concentricity shall be indicated according to EDS-A-1105. 30 EDS-A-1101GENERAL TOLERANCES PAGE: 11/11 ISSUED DATE: 1996. 04. 10 REVISED DAT
44、E: 2008. 05. 31 VERSION: 4 GM DAEWOO Auto & Technology Table 13. Machining general geometric tolerances Unit : mm Straightness, flatness,and parallelism Runout and roundness symmetricity perpendicularity Class Reference dimension 3 2 1 3 2 1 3 2 1 3 2 1 4 or less 0.08 0.04 0.02 0.6 0.4 0.2 0.4 0.2 0
45、.10Over 4 16 or less 0.15 0.08 0.04 0.6 0.4 0.2 0.6 0.3 0.15Over 16 63 or less 0.30 0.15 0.08 0.8 0.5 0.3 0.8 0.4 0.20Over 63 250 or less 0.60 0.30 0.15 1.0 0.6 0.4 1.2 0.6 0.30Over 250 1000 or less 1.20 0.60 0.300.3 0.2 0.1 1.6 0.8 0.5 1.6 0.8 0.40Remarks) In selecting a tolerance from above Table,
46、 the reference dimension corresponding to the feature size of objects machined or inspected must be taken. However, in case of flatness tolerances on rectangular surfaces, the reference dimension corresponding to longer lateral length must be taken, if the lengths are different. 12. RELATED STANDARD
47、S KS B 0250 Cast product tolerance system KS B 0411 General tolerance of cast iron KS B 0412 Tolerance of length and angle without individual tolerance designation KS B 0413 General tolerance of metal pressed products KS B 0414 Forging tolerance KS B 0415 Die casting general tolerance KS B 0416 Metal sheet sheared product general tolerance KS B 0417 Metal sintered product general
