Disclosure to Promote the Right To Information

इ टरन ट म नक Disclosure to Promote the Right To nformation Whereas the Parliament of ndia has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of ndian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to nformation, The Right to Live प0र 1 क छ ड न' तरफ Jawaharlal Nehru Step Out From the Old to the New S 7876 (197): Gauge allowances and manufacturing tolerances for plain gauges for outside measurements for SO fit sizes (nominal size up to 00 mm) [PGD 2: Engineering Metrology]! न $ एक न' भ रत क +नमण Satyanarayan Gangaram Pitroda nvent a New ndia Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

WDC 621073.3 ( Fifth Reprint DECEMBER 1997 ) Si7876197 ( Reaffirmed 199 ) lndian Standard GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR PLAN GAUGES FOR OUTSDE MEASUREMENTS F3R S0 FT SZES (NOMNAL SZE UP TO 00 mm). Scope Lays down the gauge allowances and manufacturing tolerances for plain snap gauges, ring auges and reference discs for gap gauges for outside measurements (shafts) for S0 fit sizes up to 00 mm nominal size.!. Symbols Following symbols are used in this standard (see a/so Fig. 1): Agn = Gauge allowance for GO member, new; Ang = Gauge allowance for NO GO member; &W= Wear allowance for GO member, worn out; Yl = Margin, outside the GO workpiece limit, of the wear limit of gauges for shafts; Note For grades 9 and above, y1 =O. =1 = Distance between the centre of tolerance zone of new GO gauges for shafts and GO workpiece rimit ; Note For values of y1 and z,,seetable 3 of S: 34l 971 Gauging practiceforplain workpieces (fifslrevision). % = Safety zone provided for compensating measuring uncertainties of gauges for shafts of nominal diameter above 180 mm ; 4 = Tolerance on gauges for shafts (other than reference discs for gap gauges) ; HP = Tolerance on reference discs for gap gauges; N = Nominal size of the workpiece; T = Tolerance of the workpiece; G = Upper deviation of the workpiece; and K = Lower deviation of the workpiece. 3. Formulae for Determining Gauge Dimensions Gauge Member Formulae Examples for Calculation Snap Gauges and Ring Gauges Reference Disc for i Gap Gauges 2 e8 100 h9 200 r6 GO member, new WinL7n)i~ (20.04)+0.003 (1000~01)10~00 (20010~099)+0~002 2 =24.9&0,003 ==99.98&0,00 =200.099+0.002 2 NO GO member (N+Ang) + (20,073)&0.003 (loo0.087)+0.00 (200+0.079)10~002 2 =24.927&0.003 =99.913&0.00 =200.079&0.002 2 GO member. worn out NfAgw 2 0,036 100O 200+0~109 =24.964 =loo =200.109 *H 2 should be substituted for 2 in the formulae for reference discs for gap gauges. 2 S. Disposition of Tolerance for Snap Gauges, Ring Gauges and Reference Discs for Gap Gauges Figure 1 shows the disposition of tolerance for the snap gauges, ring gauges and reference discs for gap gauges with relation to workpiece tolerance.. Calculated Values Calculated values (in pm) of the gauge allowances for snap gauges, ring gauges jr d reference discsfor gap gauges for a few selected SOtolerance zones are given in Table 1 under/l. _ Adopted 10 October 197 6 May 1976, BS Gr 8 BUREAU OF NDAN STANDARDS MkNAK EHAVAN, 9 BAH.4DlJR SHAH ZAFAR MARG NEW DELH 110002

S : 7876 197 TABLE 1 GAUGE ALLOWANC.ES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS (Clause ) All values in pm. TOLERANCE CLASS bll + 18 Agw + gn Ans 30 Asw Agn 1.2 10 60 164 0.7 94 3 o7 240 3 170 3 10 9 166 4 1 111 4 1 260 4 20 4 18 1.2 1 129 1 4= i 1.2 332 ' 470. T 320 342. 460. la2 340 36 63 i 1 t t 6 22 200 66:: 1* 10 17 6: 1. 390 340 6. 220 170 80 246 7. 2 196 1. 2 440 7 390 7 Agw 240 160 100 120 410 Asn 436 7 2 268 7. 2 208 7. 2 h 630 7. 460 7 400?* Agw 460 260 200 120 140 Asn 492 i 2. 292 9 2. 1232 9 2. 10 9 40 9 160 3. Asw 160 Asn Ans Asw 180 Asn 140 21 22 Asw 200 Asn Ans 22 Agn Ang 20 Asn Ang 2* 3* 3 260 210 312 9 2. 242 i 2* 30 19 1 460 19 1 310 l230 [ 20 4 2 11. 78 11. t t 280 4 4. 8 11s 04 11* 63 119 61 37 60 12. 4. 410 12. 4. 4=._ 1140 li. a20 13. 660 1 1 00 89 13. 3 13. 1220 13.6 660 13. 3

S : 7876 197 TA@LE 9 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd NOMNAL SZE TOLERANCE CLASS mm 1 GAUGE d8 d9 d10 UPTO OVER AND NCLUDNG A 1 + HP Hl tl +T _T A +_ ZP A + ;+!$ 2 2 AUW 17 20 20 3 1 Ain 1 22 ) 1. O.6 1 2 1 1. O.6 2 1 1. O.6 An, 3L 1. L 1. 60 1. Agu 27 30 30 3 6 b 33 2 0.7 36 2 0.7 36 2 0.7 An, L0 2 60 2 70 2 A.W 37 LO LO 6 l ll 1 A.,? L3 2 lo*71 c7 2 O.7 L7 2 lo.7 62 2 76 2 98 2 L6 0 0 10 18 Agn C 2. 1 8 2. 1 8.2* 1 Av 77 2. 93 2. 120 2. 18 3_ 98 3 117 3 L9 3 7 80 80 30 0 Agn 86 3. 1.2 91 3. 1.2 91 3. 1.2 119 3. 142 3. 180 3. AW 9 100 100 0 e 10 1 A,n 1 107 1 L 1 1. 1 113 1 4 1 1. 113 1 4 1. Ano lk6 L 174 G 220 ] 1lL 120 120 80 120 Agn 128 2 13 2 13 2 17L 207 260 Ama 139 14 ll O 1 Ain 1 1i 1 6 1 2. 1 163 1 6 1 2. 1 163 1 6 1 2. 20 j! Ang! 208! 6!! 2L! 6!! 30! 6 ) Acw l67 l7.d 180 20 Agn 191 7 3. 281 7 187 1 196 20 31 Agn iil 204 8 & 214 26 0 314 208 217 31 LOO Av 226 9 1. 1 238, 292 9 343 1 1 228 239 LOO 00 _ A!r 248 10 262 10 1 318 (10 1 [ 376 [ 10 1 4

S : 7876 197 TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd NOMNAL SZE TOLERANCE CLASS mm i e7 e8 e9 UP TO GAux OVER AND NCLUDNG A +% 2 _f + A +7 +p A ++!$J Agw 12. 11 14 3 Agn 1. 1 04 16 1. 0.6 19 1. 0.6 Ang 2.4 1 28 1. 39 1. Anu 18. 11 3n _ Ang 32 1.2 38 2 0.i. t 31 6 iin 22 1.2 0. is 2 0.7 26 2 0.71 6 10 Agw 23. 22 2 AP 27 1.2 0. 28 2 0.7 32 2 0.7 & LO 1.2 47 2 61 2 30 28 32 10 18 hw A,n 34* 1. 0.6 36 2. 1 LO 2. 1 Ang 0 l 9 2. 7 2. Agw 37 36 LO 18 30 Agn 43 : 0.7 4 3 1.2 L9 3 1.2 h 61 73 3 92 3 A,w L7 4 0 30 0 b L 3. 2 0.7 6 3. 1.2 61 3. 1.2 Ang 7 2 89 3. 112 3. Agw 7 60 0 80 Agn 6L 2. 1 67 4 1. 73 L 1. 90 2. 106 4 134 L _ 68 66 72 80 120 4w b 77 3.1*2 80 2 87 2 h 107 3 126 19 b ~81 79 8 120 180 4, 91 L l7 94 6 2. 193 6 2. h 12 L 148 6 18 6 180 20 97 Ag* Agn 97 1OL 107 2.2 112 7 3. 121 7 3. ih 143 1 1 [ 168 7 21117 20 = 31 31 4 A"" i 400 1 &n 1.46 1 7. L ii 1 10 Ang 1 1Q 1 7. [ 1 223 1 10 1 1 281 1 10 1

S : 7676 197 TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd NOMNAL SZE 1 T TOLERANCE CLASS lt Ayw 6 10 AYE An!, 10 18 As9 Ang _ A f6 f7 +tb _ 2 2 A t H _ 3 1.2 1.2 1.2 1.2 1. 1. t H _ 2. 1. : _.; 24 2.. 0 80 h Agw 80 120 Asw 120 180 Agn Av 180 20 Asv,,, 1 Ana Ll 2 0 27 27 3L 2. 1 34 49 2. 60 32 32 61 3 1.2 41 8 3 71 39 39 19 4 1.7 49 68 4 83 47 L7 7 2.2 7 L 93 3 3 64 104 60 3. 72 11.3 66 ; 2 2 22:; 3 3 37 L l7 2 L 6 6 6. 6. 7* 7. 1CS 3. 78 144 4 t 66 r,!, i 1 ; _ 3. 3. L L 6 _L. 7. 7 i a 2 3.

S : 7676 197 TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd NOMNAL SZE TOLERANCE CLASS 30 0 0 80 Agw 7 A, 11 1.2 _ 20 1.2: Agw 8 A,n 12 1. Av 23 1. Agw 9 80 120 rlgn L. 2 Ang 27 2 120 11 180 20 Ang LL 7

c S : 7676 197 TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd TOLERANCE +1 +1 1 8:: OS 1; 1.2. 1.2 + 1 + 1. 1; 0;s 0 1 0. 9 2 1.2 CLASS h7 +J A k!$ + l 0.4 1. 1 10 1 +1 t2. 1 0.6 2. 1. 6 1 11 1. 0.6 +2 +3 Asw 180 20 20 31 Agn 31 400 Ang Agn Ang 400 00 Agn An.2 9 1. 1.2 0.7 13 3 : +2 t3 2 1.2 0.7 3. 2 11 1.2 16 2 +2 t3 2 1. 1 2. 13 1.,, 2. t3 t4 12. 2 1.2 22 : +3 + 3 22::.7 6 4 16 2 4 t2 4 3 2.2 Y 19 3. 27 t 1. f3 : 3 0 21. 29 +1* +2 6 4. 3. 10 22. 4. 32 $1 +2 7 z 4 11 24 3 2 2 t3 1 4 2. 30 2. t4 1.2 3 3 3 + 1.7 6 4 t 40 4.2 l7 2.2

S : 7676 197 TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd (Confinudf)

10 S : 7876 197. TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Conid NOMNAL SZE mm OVER T TOLERANCE c iauge js 1 is6 CLASS UP TO AND NCLUDNG A t. 3 Agn Ann 3 6 Ang 6j 10 10 1 18 1?O 1 0 0 80 80 120 120 180 180 20 i 120 1 31 ii: Ann Am Aew Agn h kjw *w Aow 2; Asw Agn Agw *sw 7.1: +12 +6 2. 9 2. +12 + 6 t 9 ;:; 0.7 o7 1 1.2 l7 2.2 + 9. + 3. 6. t 11 + 4. 8 0. 0. 0.6 c 0.7 0.7 4 22 + 12. t. 2; 1 9. 2. +1 + 6 1.2 11 3 t +1 6. + 6. 4 1.7 1 2 4 +17. + 7. 2.2 1 2. 3 t 6. + 3. + 7. + 4 6 +9 +. 7. +11 + 6. 9 = K 10. + 1. + lz. + 18 + 11 1 $+ :::; 17. + 24 +14 20 ::g 20 $29 + 0 22 + 30. + 16. 22. 131 1 400 3. h t+ AOW + 33. Aon 4 + 20. Ang 24. 1400 L7 2 1 1 1.2 1.2 1.2 1.2 1. 1. 2 2 2. 2. 2. : 4 66 ;:; 7. 7. t P T 0.4 0. 0. O6 0.7 0.7 1 1.2 1.7 2.2 3 3. 4

S : 7876 197 TABLE.1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTS DE MEASUREMENTS Contd NOMNAL SZE 1 1 \ mm k UPTO GAUGE OVER AND NCLUDNG A + Agw 3 Agn Ang : 0 : ;:; 3 6 ir n+ +7 0.7 Ang +l 0.7 6 10 Agn Agw : : 0.7 Ang + 1 o7 + 10S 10 + 7. 1 +1 1 18 30 Agw +13 Agn + 9. 1% Ang + 2 1.2 A9w 41 30 0 Agn + 11 1.2 Ang + 2 1.2 +17 0 80 2. + 13 1. Ang + 2 1. + 21 80 120 % + 1. 2 Ang +3 2 o 0. TOLERANCE A + 7. + i. 0 + 10. + 7 4 1 + 11. + 8 + 1 + 14 0.6 $ y= + 18 0.7 + 12 + 2 + 21 + 0.7 + 14. 2 + 24 1 + 17 i 2 k 29 t 1.2 + 20 CLASS 3 +3 3 417 4.7 +31 L 1.7 L +3 4 180 Ang + 3. r 2.2 +3 43 2.2 +7 _.._. Agw + 30. 31 400 Agn Ang + 236. ::: 6 3 +48 + 9 6 3 6 +8 6 +63 6. 3. + 1 ; 3. 6. + 10 1 Aeg + 8 1 11

S : 7876 197 TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd NOMNAL SZE TC LERANCE CLAS mm GAUGE m m6 m7 OVER 1,E, A A +$? + 9. 3 + 6. 1 0.4 +2 1 3 6 +13. + 10 1.2 0. + 4 1.2 61 10 + 16. : Z 1.2 0. 7 10 18 30 +20 i 18 + 1.. 0.6 + 7 1. 30 0 +24 0 80 80 120 120 180 :: j44 +9 +34 4 1.7 +49 4 1.7 +1 4 +1 4 +49 f66 180 20 +39 2.2 +6 2.2 * +19 $20 + 1 +7 20 31 + 44 3 +64 6 3 + 23 : t24 6 31 ( 400 + 47 +9 +a0 3. t 68 6. 3. + 2 t: + 27 6. +6 t88 400 00 + 2 7. 4 + 7 7. 4 i + 28 7. t 30 7. 12.

S : 7876 197 TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd mi n TYLERANCE CLAS: +!il z 0 :; n6 n7 AH +% A!$ +!!? + 11. + 1. 0.4 + 0. 4 1 0.4 : Za : 0e4 0.7 0.7 0.7 0.7 : 0. + 14 17. 1.2 0. : :ii 1.2 0. f6 1.2 + 6 1.2. + 20. + 2 6. 0. + 17 10 1.2 l2 0. +10 + 23 ~~~. OS +2 +32 0.6 + 20. 1. 0.6 + 27. 1. 0.6 12 1. + 12 1* 1.2 l*i 1.2 1.2 180 20 i 3 km +47 i32 20 31 2: $ zt. + 3. t 63. 31 400 Aon +6 t 39. Ae* +66 400 00 p; +60 n c43 22 2. 2. 33:: 4 4 13

S : 7876 197 TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd WMNAL mm SZE 3 6 t 6 10 10 18 18 30 30 0 0 80 80 120 120 180 180 20 ;AUGE A,, Agw 4n Agw b h Ang_ Agw 4n Anq A9n A9w A9n A9w A9n 4w kin 4w A9n 4, b h 4u Av h T TOLERANCE CLASS P P6 +h +!?P A ++ F 22 A +11 t 13. + 9 0.6 0L + 10. 1 0.4 +6 Ov6 +6 1 + 18 + 21. + 16 0.7 0. + 18 1.2 0. + 12 o7 + 12 1.2 +33 430 + 29. 1.2 x).7 t 32 2 0.7 + 22 1.2 $22 2 1 + 66 f96 t110 i08 4 + 97 7. 4 f71 73 7. + ll +2 7? 1.2 0. + 1 1.2 $3 + 26 1.2 0. + 1 l2 f38 i + 33. 1. 0.6. + 18 1,s t&6. +10 0.7 + 22 2 +u t 47. 2 0.7 t26 2 +6 + 8 t 32 ;: 1 26 t67 3 l2 t37 3 +a7 t 77 t 1.7 + 43 $99 t 89 2.2 +3, t +111 flo0 3 t 60 : t121 t 109 3. t 68 ;:; t133 t120 7. L i 7 7. 14

S : 7876 197 TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERfiNCES FOR OUTSDE MEASUREMENTS Contd TOLERANCE CLASS r r6 r7 OVER AN0 ; NCLUDNG! A + +;i p A A Agw fl + 17. + 21. 3 Agn + 13 0.6 0c + lb 1 04 + 184 Ang + 10 0.6 + 10 + 10 3 6 Agw f 21 f 2.4. + 28. All + 19 oy 0. + 21 1.2 o + 7 i A;;. _ + 1 0.7 i 1 1.2s if + 26 + 29. + 3. 6 10 + 24 oy 0. c 26 1.2 0. + 32 Ang + 19 0.7 + 19 1.2 fl9 _ AW 32. ~36 + 43 10 t A:. + 29. 1 1 0.6 4 31. 1 1. +. 38. A& 1 + 23 1 t 23 1. + 23 1 Agw +39 +LL + 2 18 30 Agn + 3. 1.2 0.7 + 38 2 + L6 2 ^7 Ang + 2% 1.2 t 28 2 + 28 2 30) 0 0) 6,61 80 100 120 Agw Agn + L7 + 43 li 0.7 + 3 + is. 2 Ang + 34 1.2 + 3fl 2 Agw +6 +63 2, + 2 41 1. 1 + t 6 41 2. Agw te f6 Agn + 4 1. 1 + 6 2. +6; 2 +77. 1 3J Asn + 63. 2 1.2 + 68 3 1.2 + 81 Aig + 1 2 + 1 3 + 1 Agw +72 +80 + 93 Agn + 66 2 1.2 + 71 1.2 + 0L Ang +& 2 + 4 3 44 Agw %& +92 + 107 120 140 Agn + 76 2. 1.7 + 62 r..7 + 97 Ang + 63 2. + 63 2 + 63 Agw +66 +94 + 109 140 160 h +60 * 1.7 + 04 1.7 + 99 Ang + 6 22.: + 6 : + 6 160 180 Agw +a9 497 + 112 Agn t 63 ;:; 1.7 f 87 L.7 + 102 Ang + 68 + 68 4 + 68 180 200 Agw +99 +109. + 126 Agn + 93 3. 2.2 99 2.2 + 116 A.g + 78 3. + 79 + 60 Agw flo2 + 112 + 129 200 22 Agn + 96 ;: 2.2 +102 r 2.2 + 119 Ang + 81 + 62 + 63 Agw +106 +116 + 133 22 20 h + 100 3 2.2 + 106 2.2 + 123 Ang + 6 3. + 66 + 67 Agw + 118. +129 + l&9 20 280 Agn + 112 2 3 + 116 6 3 + 138 A g + 9. 1 + 97 6 + 98 Agw + 122. +133 + 13 280 31 h + 116 3 +122 6 3 + l&2 Ang + 99. : + 101 6 + 102 31 3 Agw + 134. + 146 + 167 Agn t 127 4 3. + 13,s 67 3. + 1 Ang + 110. 4. + 112 6. + 111 Agw +140. Cl2 + 173 3 400 Agn + 133 4. 3. + 140 6. 3. + 161 hg + \t 6. k. + 118 6. + 120 Agw +11 +168 + 191 400 40 Agn + 126 + 1 + 178 Ang +129 + 131 ;; + 133 Agw +160 +172 + 197 40 00 Agn + 12 4 + 161 L + 161 _ Ang + 13 z + 137 ;: + 139 2 0.7 2 2. 1 2. 2. 1 2. 3 1.2 3 3 1.2 3 : 1.7 : 1 7 4 1.7. L L 1 22 2.2 6 3 1

S : 7676 197 TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd NhllNAL SZE TOLERANCE CLASS mm 1 r s6 0,s + 28 1.2 0. 1 :9" 1.2 + 33. + 3 ; 0.1 + 3 i z. 2 0.7 CL3 2 t86 + 79 1 + 3 22:; + 92 + 8 2; 1 + 9 2. ++bi 3 1.2 t 71 3 tl18 t 109 1.2 t 79 : 4136 + 126 L 1.7 492 L Agw 280 31 Agn z 176 19. t 194. + 100 Ang + 171. L Agw + 216. 31 3,Agn + 209 L Ang t 192. L. As* t 234* 3 400 Agn + 221 L. Ang t 210. 4. Agw t260 400 40 Agn +22 Ang + 23 40 600 Agw +2ao AA:; + 212 +, 2 3. + 23L 6. 3. + 212 6. t 2lL 4 t 261. L t 231. + 294 L + 281 l + 27. +20216 13 + 162 6 t 22 t 21L 6 3 + 1lL 6 +219 + 231 6. 3. + 196 6. + 301 L + 29 16

ls:7676197, TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd NOMNAL SZE TOLERANCE CLASS mm SAUGE 16 17 T u7 +h +HJ 2 2 0.L 3 Agw 3 6 A9n 0. $ A9w A9n 0. 2 A9w Ag. 7 0.6 A9w A9n A9w + 2 + 7 A9n + LB. 0.7 + 1 2 o7 + 41 YE. + L 2 A9w + 61 + 67 qt A9n + 7 1.2 0.7 + 60t 2 0.7 A.9 + LB l2 + L8 2 A9u + 67 + 73 401 0 A9n + 63 1.2.7 + 66.E + L 1.2 + L Av + 81 + 00 0 6 A9n + 77 1. 1 + 81 Av + 66 1. + 66 6 80 80 100 laol A9w A9n : 8: A 9 + 7 Agw t 109 A9n + 103. + 91 A9w +122 A9. +116S tlol t L3 Av +137 + 122 A9w A9. : 1% _9 + 13L Av + 167 A9n + 161 + L6 A9w A9n, 18 ; Ana + 167 8%, t 218 A9n + 212 t 197 A9w + 2L2. Agn + 236 ng + 219. Agw + 26L* Ag* + 28 Av + 2L1. A9* Agn : 22E t 210. A9w + 320. 49n + 313 + 296. A9w + 38 A9n t 30 A9 + 333 Agr + 388 49n t 380 + 363 t ;:' + 97 1 + 90 + 7 + 117 1.2 + 108 + 91 t t130 1.2 +121 +lol / ;: $1 ::; :::. :: L L : L L. L. 4. j + 130 : 1.2 + t 121 91 + L3 : 1.2 +13L + OL i166 L 1.7 + 16 L t 122 + 178 : 1.7 + 168 fl3l f 190 L 1.7 + 180 L t ll6 + 21 2.2 f20 + 169 3 1.2 3 L 1.7 L : 1.7 i.2 : +r 17

S : 7676 197 EXPLANATORY NOTE S : 34l 971 Gauging practice for plain workpieces (first revision) specifies the dimensions for different types of plug, ring and gap gauges. This standard gives in a tabulated form the calculated values of the gauge allowances and manufacturing tolerances for snap gauges, ring gauges and reference discs for gap gauges of nominal sizes up to 00 mm for selected SOtolerance zones as recommended in lso/r 1829l 970 Selection of tolerance zones for general purposes. This standard supplements the details given in S : 34l 971. For individual gauges reference should be made to the following standards2 a) S : 348l 972 GO plain ring gauges (size range 1 to 31 mm) (first revision) b) S : 66331972 NO GO plain ring gauges (size range 1 to 31 mm) c) S: 70181973 Technical supply conditions for gauges n the preparation of this standard assistance has been derived from DN 7163 966 Arbeitsrachenlehren und Priiflehren fi_ir SOPassmasse von 1 bis 00 mm Nennmass Lehrenmasse und Herstelltoleranzen (Workshop snap gauges and reference gauges for SOfit sizes from 1 up to 00 mm nominal size; deviations and tolerances for gauges) issued by DN Deutsches lnstitut fiir Normung. 18