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' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New S 2030 (199): Box Spanners [PGD 5: Assembly Hand Tools]! 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 ndian Standard BOX SPANNERS SPECFCATON ( Second Revision ) S 2020 : 19 First Reprint OCTOBER 1994 UDC BS 1990 BUREAU OF NDAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELH July 1990 Price Grollp 3

5 Assembly Hand Tools Sectional Committee, PED 05 FOREWORD This ndian Standard ( Second Revision) was adopted by the Bureau of ndian Standards on 3 November 199, after the draft finalized by the Assembly Hand Tools Sectional Committee had been approved by the Production Engineering Division Council. This standard was first issued in The first revision was taken up to base the pairing of doubleended box spanners on S0 Recommendation SO/R 105 : 1969 Combinations of doubleended wrench gaps, issued by. the nternational Organization for Standardization ( S0 ). Advantage of that revision had been taken to give the dimensions of singleended and doubleended tubular and solid box spanners separately. The requirements relating to hardness and torque test had been based on S0 Recommendation SO/R 171 : 1970 Hand operated wrenches and sockets, t@nical specification. Box spanners are commonly used for the assembly of threaded fasteners in the workshops and in automobile industry. These spanners are used with a tommy barwhich passes through the hole in the body of the spanners. They find a preference over the conventional types of spanners with handles in places where sides are obstructed and accessibility is poor. Box spanners are manufactured from steel tube or solid bar by forging, but they are not finished by machining across the flats. This necessitates a liberal tolerance on the width across flats when compared with the open jaw or ring spanners. This standard deals with the requirements of box spanners of single and doubleended types, made from tubes or solid bars which are used with a tonimy bar. t does not cover the box spanners provided with universal joint or socket spanners. The sixes are suitable for use with nuts and bolts conforming to relevant ndian Standards. This revision has been taken up in order to include many sixes which are commonly being used. Test torque values have been deleted and for that, reference of S 6131 : 190 Technical.requirements for hand operated wrencher ( spanners ) and sockets (first revision ), has been included. Reference of latest available standards has also been made. While preparing this standard, assistance has been derived from the following revised standards issued by the Deutsches nstitut fiir Normug ( DLN ): DN 659 : 192 Tee handled socket wrenches, tubular single er@, DN 96 : 1976 ( Teil 1 ) Tee handled socket wrenches, double end, DN 96 : 976 ( Teil 2 ) Tee handled socket wenches, tubular double end, DN 99 : 190 Technical specifications, band operated wrenches and sockets, and DN 3 12 : 192 Tee handled &ocket wrenches, single ended. Maximum outside head dimensions d, d,, d.., e, e,, and es, have been aligned with 1SO 2236 : 192. Assembly tools for screws and nuts Forged and tubular socket wrenches Maximum outside head dimensions, issued by the nternational Organization for Standardization ( S0 ).

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8 s 2030 : 199 ndian Standard BOX SPANNERSSPECFCATON ( Second Revision ) 1 SCOPE 1.1 This standard covers the dimensions and other requirements for single and doubleended box spanners made from solid bar or tubular section of steel for use with a tommy bar conforming to S 6002 : 1971 Tommy bars for box spanners. 2 REFERENCES 2.1 The following ndian Standards are necessary adjuncts to this standard: S No. Title 1570 Schedules for wrought steels for ( Part 2 ) : 1979 general engineering purposes: Part 2 Carbon steels ( unalloyed steels ) 2027 : (Part ) : : : f : TYPES 3.1 Solid Box Spanner Width across flats for spanners and sockets ( second revision ) Sampling inspection tables: Part 1 nspection by attributes and by count of defects (first revision ) Tool and die steels for cold work (Jirst revision ) Tommy bars for box spanners Technical requirements for hand operated wrenches ( spanners ) and sockets (first revision ) A single or doubleended box spanner made from a solid steel bar. 3.2 Tnbular Box Spanner A single or doubleended box spanner made from tubular section of steel. 4 DMENSONS 4.1 The dimensions for box spanners shall be as given in Tables 1 to The tolerances on width across flats for the spanners shall be in accordance with S 2027 : 190 and shalt conform to the tolerances as specified for unmachined spanners. 5 MATERAL 5.1 Box spanners shall be manufactured from only those alloyed or unalloyed steels which after suitable heat treatment, meet the requirements of hardness and torque test as laid down in 6 and 10. Some of the stutable materials for the manufacture of box spanners are 4OC of S 1570 ( Part 2 ) : 1979 and TSOCr4 v 2 as specified in S 3749 : HARDNESS 6.1 The spanners shall be hardened over tbe entire length and the hardness measured at any point on the spanner shall be within the limits specified below: a) Up to and including 32 mm 39 to 44 HRC width across flats b) Over 32 mm width across 35 to 44 HRC flats NOTE Spanners of nominal width across flats of 30x36 mm and 32x 36 mm aball have the hardness corresponding to ( b ) above. 6.2 The box spanners shall not be casehardened. 7 wo~~nhmsm~ AND FNSH 7.1 The spanners shall be well forged to shape and finished smooth all over. AJJ sharp comers shajj be removed. The spanners shall be free from burrs, cracks, seams or other manufacturing defects. The body and the hexagon shall be in good.. alignment. and the ends shall be square with tne x Box shall be protected against rust by plating them with nickel, chromium or zinc; or by any other suitable process at the optton of the purchaser.

9 _ : 199 Table 1 Dtmenstons for StngteEnded Tnbotar Box Spanners ( Cluuse 4.1 ) All dimensions in millimetres. Nominal Width 0 h dr e lruorss F1**s Min Min Max Max 1 Jbhx / _ ( j F. O T _ i S p i / ) _ i 19 1s 2 5 i ( 2 ; 21 1s 30.5 ) :j / owe_ i j. _ so 55 *Conforming to S 6002 : i. _.. A Min s c Nomi2 Size Tommy Bar* %

10 S 2030 : 199 Tabk 2 Dimemsio~~ for SipgkE&d Sotid Box Spamms ( clullse 4.1 ) All dimensions in millimetrcs. Nominal Width Across Flats S ~.. _.. _.._ 14 / , i _ l5 ;._ ~ p i , ~ _._,; _( <F._, :.. 27 _ 30, /zl _A 34 itic) _ _.. 5L <OF 46 ig, ;;+$; i _ t _ ,.50_ ,_ *Conforming to S 6002 : 1971., 41 ~ _ l _ ~ O _ vw _ _A._ _ s. _ L s 500 4so 45

11 Tabe 3 D&ask for DooMeEaded Tubular Box Spannem ( Cause 4.1 ) All dim&ions in millimctres. Y 7 NooJaal O* ba br 4 da Cl es 1 w te = Mill Mil 1 _ &XS, M Mill Min Maa L, _L _ Max Ma: MOJ r Mi,. *?._ 6x _ ! v 6 i _ 5 7x. 1. 1'5 i._ l X9 v_ 7 19.: _ i 13 _ 14i i X _ _ _ 20 r 14 10x ;; _. 10x G. < 5 _.. _ i A.._. _ 11x13 z ?_ 20j i 12x x14 _ l9 21.._ G. i 14X1j _ 2 Y ! i iz 135 _ 30 S 13x %j x x _ 12 _..._ ~ z. 7 _. _ _ 17x j i x _ p 19x x22 15 _ _ 19x24 z 4 _ , _ _ _ 21x _. _ ii 22x _ _ s _ 49 _ ,. 24x x _ G 14 5 _ _ x x2.i 21 _ x x x34 _ Gfi 22 _ 55. _ 59 _ E _. _. 30x x36 : X , X36 my _$t& 27 PF 30 46x5 33. t 63. fii 4 _ 13 E : v 50x55 3s i K rforming to 1s 6002 : i! 971..,., 72 z ii / _.. 67 _. 75 ii 21 ( 4 E _.t._ 445 _ % 56 _ 56 A ~ t _ d 255 A 240. Nomi21 Tommy Bar* Size 20

12 Asm34l: 29aP Table 4 Dimensiorr) &r lt)jdobleaded Solid Box Spanners ( &use 4.1 ) All dimensions in rpillinp$res.. Nor&al WKttpb~cross 01 aa s;xjl._ Miu Milr _ 6x _ 7x 6 x 9 x i&x i x p 11 Xl3._ x.13. _ 9 _ 12 x 14 ep 10 14x x x17 ~ io L 12 x ~. * P y;j x x19.= _ce v y 19x x E _ a 19x24 19? 26 *_L x23 rii _A 2.2 X 24 _. \ a _ 24x26 E, ; p 24x ,yl 34 5 _ 24X ).L 25 x 2 5 _ x i 42 _ 27x C J 27X _ 30x x34 30x x x36 26, 36 x _ 41 x x x55 3c *Conforming to S 6002 : _. Nominal Size of _._ MeX Min Tommy Bar* _ 0 _ 0 _ 170 _ S? T<OT _ _ 290 _ 190 _ 2l_Mr Q0. _ 21Q _ i~~j 6 p _ tJ _ TO. _ 19 w _~ $

13 s 2030 : 199 TOMMY BARS 10 TEST.1 The spanners shall be provided with holes for tommy bars as shown in the relevant tables. The tommy bar shall conform to S 6002 : f two holes are required for singleended solid box spanners ( see Table 2 ); the location of holes shall be as shown in Fig Torque Test The torque test shall be carried out in a manner as specified in S : The box wrenches ( spanners 1 shall meet the torque test requirements of series A if made of alloy steel or series B if made of carbon steels, as specified in S 6131 : 190. At the completion of the test, the spanners shall show no sign of any damage or permanent deformation. FG. 1 LOCATON OF HOLES ON SNGLEEND&D SOLD Box SPANNERS.2 The tommy bars shall be a separate item and shall not be supplied with the spanner unless specifically ordered. 9 SAMPLNG 9.1 Lot n any consignment, all the box spanners of the same size manufactured from the same material under similiar conditions of production shall be grouped together to constitute a lot. 9.2 For ascertaining the conformity of the lot, the procedure for. sampling and inspection as given in S 2500 ( Part 1 ) : 1973 shall be followed. The type of sampling plan, inspection level and acceptable quality level ( AQL ) to be followed for various characteristics shall be as given in and For ascertaining the conformity for dimeosions, designation, workmanship and finish and tommy bar requirements, a single sampling plan with inspection level V and AQL of.5 percent as given in Tables 1 and 2 of 1s 2500 C Part 1) : 1973 shall be followed For hardness and torque tests, a single sampling plan with inspection level and AQL of 1 5 percent as given in Tables 1 and 2 of S 2500 ( Part 1 ) : 1973 shall be followed. 11 DESGNATON 11,l The box spanners shall be designated by its commonly used name, solid or tubular, doubleended ( DE for doubleended and SE for siogleended ), width across flats, type of handle in case of singleended solid box spanners ( L for long handle, S for short handle ), and number of this standard. Example: A singleended tubular box spanner having a nominal width across flat 10 mm shall be designated as follows: Tubular Box Spanner SE 10 S 2030 A doubleended solid box spanner on oominal size 10 x 11 mm shall be designated as follows: 12 MARKNG Solid Box Spanner DE 10 x 11 S Each spanner shall be legibly and indelibly marked with the nominal width across flats near their respective ends and the manufacturer s name, initials or trademark. Example: A doubleended spanner having nominal widths across flats S, = 24 mm and S, = 27 mm shall be marked 24 and 27 near the respective. ends. and the manufacturer s name on the body.

14 Bureau of ndian Standards BS is a statutory institution established under the Bureau of ndfun Sfan&rds Act, 296 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. Copyright BS has a copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director ( Publications), BS. Review of ndian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such a review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users% of ndian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of BS Handbook and Standards Monthly Addition. This ndian Standard has been developed from Dot : No. PE 05 ( 469 ) Amendments ssued SSnce Pnblicrtion Amend No. Date of ssue Text Affected Headquarters: BUREAU OF NDAN STANDARDS Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi Telephones : , Regional Offices: Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg NEW DELH Eastern : l/14 C..T. Scheme Vr M, V..P. Road, Maniktola CALCUTTA Northern : SC , Sector 35C, CHANDGARH 0036 Southern : C..T. Campus, V Cross Road, MADRAS Telegrams : Manaksanstha ( Common to all O&es ) t t { Telephones t , , , , , Western : Manakalaya, E9 MDC, Marol, Andheri ( East ) t , BOMBAY , Branches : AHMADABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COMBATORE. FARDABAD. GHAZABAD. GUWAHAT. HYDERABAD., JAPUR. KANPUR. LUCKNOW. PATNA. THRUVANANTHAPURAM. Reprography Unit, BS, New Delhi, ndia