1、3 m IS0 metric coarse and fine pitch screw threads from 5 mm to 16 mm for interference fits in aluminium cast alloys with diameters Gauges for internal and external threads o) 3 g1 2! DIN 8141 Part 2 r c m Q O Z o In keeping with current practice in standards published by the International Organizat
2、ion for Standardization /SO), a comma has been used throughout as the decimal marker. Dimensions in mm 1 Scope and field of application This standard specifies types, sizes and lengths, as well as technical delivery conditions for gauges for gauging IS0 metric screw threads having the basic profile
3、specified in DIN 13 Part 19 and intended for interference fits between steel bolts, screws and studs (external thread) of property class 10.9 or less as specified In DIN EN 20898 Part 1 and holes (internal thread) in aluminium cast alloy components. 2 Fundamental principles The gauging system and te
4、rminology shall be as specified in DIN 13 Part 16. Unless otherwise specified, gauge sizes and dimensions shall be as specified in DIN 13 Part 17. For gauging workpieces, see DIN 13 Pari 18. Maximum and minimum material profiles, nominal sizes, fun- damental deviations, tolerances and limits of size
5、 shall be as specified in DIN 8141 Pari 1. As compared with IS0 metric screw threads not subject to requirements regarding interference fit, tolerances have been specified for the major diameter of the internal thread, 0, with the tolerance on the major diameter of the external thread, d, being redu
6、ced. This means that the gauging sys- tem specified in DIN 13 Part 17 is not fully applicable. 2.1 Gauging of internal threads Internal threads shall be checked by means of the following gauges: a) GO screw plug gauge as specified in clause 5, to check the minimum sizes of pitch diameter and major d
7、iameter; b) NOT GO screw plug gauge as specified in DIN 13 Part 17, to check the maximum size of the pitch diam- eter; c) NOT GO screw plug gauge as specified in clause 5, to check the maximum size of the major diameter; d) GO plug gauge as specified in DIN 13 Part 17, to check the minimum size of t
8、he minor diameter; e) NOT GO plug gauge as specified in DIN 13 Part 17, to check the maximum size of the minor diameter. 2.2 Gauging of external threads External threads shall be checked using the following gauge types: a) GO screw plug gauge or GO calliper gauge as speci- fied in DIN 13 Part 17, to
9、 check the maximum size of the pitch diameter and the length of the straight flank; b) NOT GO screw calliper gauge or NOT GO screw ring gauge as specified in DIN 13 Part 17, to check the mini- mum size of the pitch diameter; c) GO ring gauge or GO calliper gauge as specified in clause 5, to check th
10、e maximum size of the major diam- eter; d) NOT GO calliper gauge or NOT GO ring gauge as specified in clause 5, to check the minimum size of the major diameter. 2.3 Limit gauges for checking internal and external threads Limit gauges are used for convenience in checking internal and external threads
11、. Continued on page 2 to 6. uth Verlag GmbH, Berlin, has the exclusive right of sale for German Standards (DIN-Normen). 10.95 DIN 8141 Part 2 Engl. Price group 7 Sales No.0107 Page 2 DIN 8141 Part 2 2.3.1 Internal threads Internal threads shall be checked using the following limit gauges: a) Limit s
12、crew plug gauge as specified in clause 5, to check the pitch diameter and the major diameter of internal threads; b) Limit plug gauges as specified in DIN 13 Part 17, to check the minor diameter of 6H internal threads. 2.3.2 External threads External threads shall be checked using a gap gauge as spe
13、cified in clause 5 for the major diameter of external threads. 3 Thread profiles The gauge profiles shall comply with DIN 13 Part 17, except for a) the profile of GO screw plug gauges, for which the fundamental deviation of the major diameter, ESD. as specified in DIN 8141 Part 1 applies; b) the pro
14、file shown in figure 1 for NOT GO screw plug gauges for checking the major diameter of internal threads. j .- U Values for Tp as specified in DIN 13 Part 17. Values for b as specified in table 3. r Figure 1 : Profile of NOT GO screw plug gauges for major diameter Table 1 : Dimensions of thread profi
15、le as in figure 1 b Nominal size I Limit deviations Pitch, P I 12 4 Tolerance zones The position of tolerance zones shall be as specified in DIN 13 Part 17, except for gauges intended to check the major diameter of internal threads, as illustrated in figure 2. Wear limit of NOT GO Plug gauge GO size
16、 ci GO plug gauge / Wear limit of GO plug gauge Figure 2: Position of tolerance zones DIN 8141 Part 2 Page 3 As in DIN 2281-1, with type R gauge handle: gauge member as in GO screw plug gauge for pitch diameter and major diameter (minimum size) DIN 2282-1 5 Dimensions The gauge sizes and lengths sha
17、ll be as specified in tables 2 to 8. The use of limit gauges shall be as specified in table 9. _ As in As in table 4 table 5 Table 2: Sizes of gauge (plug gauges) for checking internal threads As in table 4 Symbol As in table 6 Gauge type Gauge type Gauge length NOT GO ring gauge for major diameter
18、(minimum size) As in DIN 2254-1 Gauge length Gauge sizes Tolerances and deviations Al NOT GO screw plug gauge for pitch diameter (maximum size) NOT GO screw plug gauge for major diameter (maximum size) A2 As in DIN 13-17 As in DIN 2283-1, with type R gauge handle; gauge member as in DIN 2284-1 A3 As
19、 in DIN 2246-1, with type R gauge handle; gauge member as in GO plug gauge for minor diameter (minimum size) As in for 6H threads DIN 13-17, As in DIN 2284-1 DIN 13-17 As in DIN 2247-1, with type R gauge handle; gauge member as in NOT GO plug gauge for minor diameter (maximum size) DIN 2249-1 A4 A5
20、Table 3: Sizes of gauges (ring gauges and gap gauges) for checking external threads Gauge sizes Tolerances and deviations Symbol GO screw ring gauge for pitch diameter (maximum size) B1 As in DIN 2285-1 GO screw calliper gauge for pitch diameter (maximum size) NOT GO screw calliper gauge for pitch d
21、iameter (minimum size) 82 83 As in for 69 thread DIN 13-17, As in DIN 13-17 Not specified NOT GO screw ring gauge for pitch diameter (minimum size) B4 As in DIN 2299-1 GO ring gauge for major diameter (maximum size) As in DIN 2250-1 85 B6 GO calliper gauge for major diameter (maximum size) NOT GO ca
22、lliper gauge for major diameter t (minimum size) As in DIN 2232 As in DIN 2233 As in table 7 As in table 8 87 88 Page 4 DIN 8141 Part 2 Tolerance on major diameter, TD Over up to 50 85 85 110 110 140 Table 4: Tolerances and deviations for A 1 type and A 3 type gauges as in table 2 Values in pm Z1 Hl
23、 - 2 3 8 4 12 5 16 Gauge type Table 5: Gauge sizes for A 1 type GO screw plug gauges as in table 2 Major diameter Maxim um Nominal size I Pitch diameter and minor diameter Major diameter Gauge I NOT GO gauge screw plug type I Nominal I Limit 1 Nominal I Limit I size deviations size deviations H1 D -
24、 ESD +- Dlmill 2 GO screw plug I - - I *$ 1 As in DIN 13-17 gauge TD + Zi Gauge lengths Table 6: Gauge sizes for A 3 type NOT GO screw plug gauges as in table 2 I I i Gauge sizes Symbol CI c2 c3 Table 7: Tolerances and deviations for B 5 type to B 8 type gauges as in table 3 Values in pm Tolerance I
25、 Table 8: Sizes of B 5 type to B 8 type gauges as in table 3 and C 3 type gauges as in table 9 Major diameter Nominal Limit Gauge type size deviations d - esd - 22 I I Hv GO ring gauge, GO calliper gauge I I I 4-2 - 2 NOT GO calliper gauge I - esd - Td NOT GO ring gauge, I Table 9: Limit gauges for
26、chec ig ir xnal and external threads Gauge type Limit screw plug gauge for pitch and major diameters of internal thread Limit plug gauge for minor diameter of internal thread Gap gauge for major diameter of external thread Length as in DIN 2280 GO gauge member of A 1 type gauge as in table 2 NOT GO
27、gauge member of A 3 type gauge as in table 2 Type R gauge handle as in DIN 2240-1 GO gauge as in table 5 NOT GO gauge as in table 6 Length as in DIN 2245-1 GO gauge member of A 4 type gauge as in table 2 NOT GO gauge member of A 5 gauge as in table 2 As in DIN 2231 Tolerances and deviations as in ta
28、ble 7 As in DIN 13-17, for 6H thread As in table 8 DIN 8141 Pari 2 Page 5 6 Designation Gauge DIN 8141 - A 1 - MFS 12 I Designation DIN number Gauge symbols as in tables 2,3 and 9 Thread symbol Thread size (nominal diameter X pitch, the latter not being relevant for coarse pitch threads) 7 Gauges fo
29、r external threads with coating The pitch diameter of external threads with coating shall be checked by means of GO gauges for 6h threads. The major diameter shall only be checked by means of gauges as specified in this standard. 8 Requirements 8.1 Technical delivery conditions As in DIN 2239. 8.2 L
30、ettering and marking As in DIN 2279. Gauges intended for checking threads as specified in this standard shall be marked with the thread symbols and thread sizes. Page 6 DIN 8141 Part 2 Standards referred to DIN 13 Part 16 DIN 13 Part 17 DIN 13 Part 18 DIN 13 Part 19 DIN 2231 DIN 2232 DIN 2233 DIN 22
31、39 DIN 2240 Part 1 DIN 2245 Part 1 DIN 2246 Part 1 DIN 2247 Part 1 DIN 2248 Part 1 DIN 2249 Part 1 DIN 2250 Part 1 DIN 2254 Part 1 DIN 2279 DIN 2280 DIN 2281 Part 1 DIN 2282 Part 1 DIN 2283 Part 1 DIN 2284 Part 1 DIN 2285 Part 1 DIN 2299 Part 1 DIN 8141 Part 1 DIN EN 20898 Part 1 IS0 metric screw th
32、reads; gauging system and nomenclature for screw ring and screw plug gauges IS0 metric screw threads; sizes and design features of gauges for external and internal threads IS0 metric screw threads; gauges for external and internal threads; gauging of workpieces and use of gauges IS0 metric screw thr
33、eads; basic profile and manufacturing profiles Gap gauges and forged gauging members above 3 mm up to 100 mm nominal size Plain GO calliper gauges with forged gauging member above 3 mm up to 100 mm nominal size Plain NOT GO calliper gauges with forged gauging member above 3 mm up to 100 mm nominal s
34、ize Gauges for use in dimensional metrology; technical delivery conditions Gauge handles for gauging members up to 40 mm nominal diameter with 1 : 50 taper shank Limit plug gauges from 1 mm up to 40 mm nominal diameter GO plug gauges from 1 mm up to 40 mm nominal diameter NOT GO plug gauges from 1 m
35、m up to 40 mm nominal diameter GO gauging members from 1 mm up to 40 mm nominal diameter NOT GO gauging members from 1 mm up to 40 mm nominal diameter General-purpose GO ring gauges and setting ring gauges for pneumatic length measuring instruments from 1 mm up to 315 mm nominal diameter Verificatio
36、n of geometrical parameters; general-purpose NOT GO ring gauges with nominal diameters from 1 mm up to 315 mm Gauges for internal and external IS0 metric screw threads; survey, lettering, marking and use Limit screw plug gauges for IS0 metric screw threads from 1 mm up to 40 mm nominal diameter GO w
37、orkshop screw plug gauges, check plugs and setting plugs for IS0 metric screw threads from 1 mm up to 40 mm nominal diameter GO screw gauging members for workshop plug gauges, check plugs and setting plugs for IS0 metric screw threads from 1 mm up to 40 mm nominal diameter NOT GO workshop screw plug
38、 gauges, check plugs and setting plugs for IS0 metric screw threads from 1 mm up to 40 mm nominal diameter NOT GO screw gauging members for workshop plug gauges, check plugs and setting plugs for IS0 metric screw threads from 1 mm up to 40 mm nominal diameter General-purpose GO screw ring gauges for
39、 IS0 metric screw threads from 1 mm up to 200 mm nomi- nal diameter Verification of geometrical parameters; general-purpose NOT GO screw ring gauges for IS0 metric screw threads from 1 mrn up to 200 mm nominal diameter IS0 metric coarse and fine pitch screw threads for interference fits in aluminium cast alloys with diameters from 5 mm to 16 mm; nominal sizes, tolerances and limits of size Mechanical properties of fasteners; bolts, screws and studs (IS0 898-1 :1988) International Patent Classification F 16 B 033102 F 16 B 035100 G O1 B 003140 G O1 B 003148 G O1 B 005102
