Disclosure to Promote the Right To Information

Transcription

1 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

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4 WDC ( Fifth Reprint DECEMBER 1997 ) Si ( 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) (1000~01)10~00 (20010~099)+0~002 2 =24.9&0,003 ==99.98&0,00 = NO GO member (N+Ang) + (20,073)&0.003 (loo0.087)+0.00 ( )10~002 2 =24.927&0.003 =99.913&0.00 = & GO member. worn out NfAgw 2 0, O 200+0~109 = =loo = *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 May 1976, BS Gr 8 BUREAU OF NDAN STANDARDS MkNAK EHAVAN, 9 BAH.4DlJR SHAH ZAFAR MARG NEW DELH

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6 S : 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 o = i ' 470. T la i 1 t t :: 1* : Agw Asn h ?* Agw Asn 492 i Asw 160 Asn Ans Asw 180 Asn Asw 200 Asn Ans 22 Agn Ang 20 Asn Ang 2* 3* i 2* l230 [ t t s 04 11* =._ 1140 li. a

7 S : 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 Ain 1 22 ) 1. O O O.6 An, 3L 1. L Agu b An, L A.W 37 LO LO 6 l ll 1 A.,? L3 2 lo*71 c7 2 O.7 L7 2 lo L Agn C * 1 Av _ L Agn AW e 10 1 A,n L Ano lk6 L 174 G 220 ] 1lL Agn L Ama ll O 1 Ain 1 1i j! Ang! 208! 6!! 2L! 6!! 30! 6 ) Acw l67 l7.d Agn Agn iil & LOO Av , LOO 00 _ A!r (10 1 [ 376 [

8 S : 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 Agn Ang Anu n _ Ang i. t 31 6 iin is Agw AP & LO hw A,n 34* LO 2. 1 Ang 0 l Agw LO Agn 43 : L h A,w L b L Ang Agw Agn 6L L L _ w b * h b ~ , 91 L l h 12 L Ag* Agn 97 1OL ih [ = A"" i &n L ii 1 10 Ang 1 1Q 1 7. [

9 S : TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd NOMNAL SZE 1 T TOLERANCE CLASS lt Ayw 6 10 AYE An!, As9 Ang _ A f6 f7 +tb _ 2 2 A t H _ t H _ : _.; h Agw Asw Agn Av Asv,,, 1 Ana Ll L L L ; :; L l7 2 L * 7. 1CS t 66 r,!, i 1 ; _ L L 6 _L i a 2 3.

10 S : TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd NOMNAL SZE TOLERANCE CLASS Agw 7 A, _ : Agw 8 A,n Av Agw rlgn L. 2 Ang Ang LL 7

11 c S : TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd TOLERANCE :: OS 1; ; 0;s CLASS h7 +J A k!$ + l t Asw Agn Ang Agn Ang Agn An : +2 t t ,, 2. t3 t : :: t Y t 1. f3 : * $ z t t t l7 2.2

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

13 10 S : 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 ?O i ii: Ann Am Aew Agn h kjw *w Aow 2; Asw Agn Agw *sw 7.1: t 9 ;:; 0.7 o l t c t. 2; t t = K lz $+ :::; ::g 20 $ h t+ AOW Aon Ang L : 4 66 ;:; t P T O

14 S : 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 Ang +l Agn Agw : : 0.7 Ang + 1 o7 + 10S Agw +13 Agn % Ang A9w Agn Ang Ang % Ang +3 2 o 0. TOLERANCE A i $ y= i 2 k 29 t CLASS L 1.7 L Ang + 3. r _.._. Agw Agn Ang ::: ; Aeg

15 S : 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 +$? : Z i :: j f * +19 $ : t ( a0 3. t t: t i t

16 S : TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd mi n TYLERANCE CLAS: +!il z 0 :; n6 n7 AH +% A!$ +!!? : Za : 0e : : :ii f l ~~~. OS * 1.2 l*i i 3 km +47 i : $ zt t Aon +6 t 39. Ae* p; +60 n c ::

17 S : TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd WMNAL mm SZE 3 6 t ;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 L Ov o x).7 t $ f96 t110 i f ll +2 7? $ l2 f38 i ,s t& u t t t 32 ;: 1 26 t67 3 l2 t37 3 +a7 t 77 t $99 t , t +111 flo0 3 t 60 : t121 t t 68 ;:; t133 t L i

18 S : 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 Agn c + lb Ang Agw f 21 f All + 19 oy o + 7 i A;;. _ i 1 1.2s if oy 0. c Ang fl9 _ AW 32. ~ t A: A& t Agw +39 +LL Agn L6 2 ^7 Ang + 2% 1.2 t ) 0 0) 6, Agw Agn + L li is. 2 Ang fl 2 Agw , t Agw te f6 Agn ; J Asn Aig Agw Agn L Ang +& Agw %& Agn r Ang Agw h +60 * Ang : + 6 : Agw +a Agn t 63 ;:; 1.7 f 87 L Ang Agw Agn A.g Agw flo Agn + 96 ;: r Ang Agw h Ang Agw l& Agn A g Agw h l&2 Ang : Agw Agn t ,s Ang Agw Cl Agn hg + \t 6. k Agw Agn Ang ;; Agw Agn L _ Ang + 13 z ;: : 1.7 : L L

19 S : TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd NhllNAL SZE TOLERANCE CLASS mm 1 r s6 0,s :9" ; i z CL3 2 t :; ; bi t 71 3 tl18 t t 79 : L L Agw Agn z t Ang L Agw ,Agn L Ang t 192. L. As* t 234* Agn L. Ang t Agw t Agn +22 Ang Agw +2ao AA:; , L t 2lL 4 t 261. L t L l t 22 t 21L lL L

20 ls: , TABLE 1 GAUGE ALLOWANCES AND MANUFACTURNG TOLERANCES FOR OUTSDE MEASUREMENTS Contd NOMNAL SZE TOLERANCE CLASS mm SAUGE T u7 +h +HJ L 3 Agw 3 6 A9n 0. $ A9w A9n 0. 2 A9w Ag A9w A9n A9w A9n + LB o YE. + L 2 A9w qt A9n t A.9 + LB l2 + L8 2 A9u A9n E + L L Av A9n Av laol A9w A9n : 8: A Agw t 109 A9n A9w +122 A S tlol t L3 Av A9w A9. : 1% _9 + 13L Av A9n L6 A9w A9n, 18 ; Ana %, t 218 A9n t 197 A9w + 2L2. Agn ng Agw + 26L* Ag* + 28 Av + 2L1. A9* Agn : 22E t 210. A9w n A9w + 38 A9n t 30 A Agr n t t ;:' t t lol / ;: $1 ::; :::. :: L L : L L. L. 4. j : t L3 : L + OL i166 L L t : fl3l f 190 L L t ll f L 1.7 L : 1.7 i.2 : +r 17

21 S : 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 : NO GO plain ring gauges (size range 1 to 31 mm) c) S: Technical supply conditions for gauges n the preparation of this standard assistance has been derived from DN 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