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इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India 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 Indian 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. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 8127 (2005): Guide Bushes for Press Tool Die Sets [PGD 4: Metal Forming Machines] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 8127:2005 — P (F .gg?m) Indian Standard GUIDE BUSHES FOR PRESS TOOL DIE SETS — SPECIFICATION ( Second Revision) ICs 25.120.10 0 BIS2005 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 B AHADUR SHAH ZAFAR M,4RG NEW DELHI 110002 Sep[eInher 2005 Price Gt-oup I Metal Forming Machines Sectional Committee, MGP 04 FOREWORD This Indian Standard ( Second Revision )was adopted by the Bureau of Indian Standards, after the draft finalized by the Metal Forming Machines Sectional Committee had been approved by the Medical Instruments, General and Production Engineering Division Council. rhis standard was first published in 1975 covering guide bushes for sizes upto 50mm diameter only. [nthe first revision guide bushes, Upto 100 mm diameter were covered to include the ‘need for large press tool sets. This standard has been taken up to update the present changes in technology and to adopt latest practices accepted internationally in Indian engineering industry. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with [S 2 : 1960 ‘Rules for rounding off numerical values (revised )’. The number of significant places retained in the rounded off value should be the same asthat of the specified value in this standard. IS 8127:2005 Indian Standard GUIDE BUSHES FOR PRESS TOOL DIE SETS — SPECIFICATION ( Second Revision,) 1 SCOPE with aminimum casedepth of O.8mm. This standard covers requirements for the three 6.2 Type CGuide Bushes types of guide bLIshes, namely, stepped solid guide, plain solid and ball type guide bushes used for Material for bush, cage, ball of guide bushes shall be flexing by light press fit H(,bores of top tool holders asfollows: in press tool sets. a) BZI.Yh-– Shall be of suitable case hardened 2 REFERENCES steel with case depth of 1.0 to 1.5 mm. b) Cage — Shall beof aluminium or brass. The following standards contain provisions which through reference inthis text constitute provision of c) Bu//.Y— Shall be conforming to IS ‘2898. this standard. At the time apublication the editions 7 HARDNESS indicated were valid. All standards are subject to revision and parties to agreement based on this Hardness of guide bushes shall be 61 to 63HRC, standard are encouraged to investigate the possibility of applying the most recent editions of the standards 8 DESIGNATION indicated below: 8.1 A guide bushof Type A having d, = 40 mm and Ikv/%’0. Title /= 80 mm shall bedesignated as: 2102 General tolerances:Part I Tolerances Guide BushA40x 80 IS 8127 ( Part 1) :1993 for linear and angular dimensions 8.2 A guide bush of Type B having d, = 40 mm and without individual tolerance 1= 80 mm shall be designated as: indications ( third revision ) ~89g :1976 Specification forsteelballsforrolling Guide BushB40x801S 8127 bearings (/ir.st re v ision ) 8.3 A guide bushof Type C having di =40 mm shall * 3 TYPES be designated as: Guide bushes for press tool die setsare classified as Guide BushC40 IS 8127 foliows: 9 MARKING a) Type A — Stepped solid guide bushes, 9.1 The guide bushesshall bemarked atanappropriate b) ~vpe B— Plain solid guide bushes, and place with the bore size, length and type of bushwith c) 7:17)e(’ - Ball type guide bushes. designation given above and also with the manufacturer’s name ortrade-mark. 4 DIMENSIONS 9.2 BIS Certification Marking Dimensions of all three types of guide bushes for press tool die sets are given in Table 1. Each guide bushe may also be marked with the Standard Mark. 5 GENERAL REQUIREMENTS 9.2.1 The use of the Standard Mark is governed The steel balls for Type C guide bushes shall by the provisions of Bureau of Indian Standurd~ conform toGrade 20 of IS 2898. Act, 1986 and the Rules and Regulations made 6 MATE-RIAL thereunder, The details of conditions under which the Iicence for the use of Standard Mark may be 6.1 Type A and Type BGuide Bushes granted to m,fiufacturers or producers may be Material shall be of suitable case hardened steel obtained from the Bureau of Indian Standards. 1 1S-8127 :2005 Table I Dimensions for Guide Bushes for Press Tool Die Sets ( clause 4 ) 6.3 ~o&,o.#, { RELIEF GROOVE B 1S;3428 fiq 4-0.0031fEl o t, A 0( ‘- “m.,,.le– R5Y HONING fm\\\\\\\\\\\\\\\R 83 . 3 I Y ~1—————l L1.1.J TYPEASTEPPED SOLID TYPEBPLAINSOLID — TYPECBALLTYPE All dimensions in millimetres. ~ d, Types Aand B “I”ypeC d? d; /, I ii4 d, d~l) i2 I3 -0.010 II, P4 -0.014 p4 (1) (2) (3) (4) (5) (6) (7) (8) (9) (lo) 15 26 ~~ 19 30.50.75 23 36 4 70 62 16 26 32 19 30,50,75 24 36 4 70 62 lg 30 36 24 35.50,75 27 47 4 80 70 20 30 36 24 35.50,75 28 47 4 80 70 ,— 14 38 44– 3.0 40,60,8.0 32 52 4 90 80 15 38 44 30 40.60, 80 33 52 4 90 80 30 44 50 36 50,70,90. 110 38 60 4 100 90 32 44 50 36 50,70.90, 110 40 60 4 100 90 38 56 62 46 60.80, 100.120 46 70 4 110 9x 40 56 62 46 60,80, 100, 120 48 70 4 110 98 4t3 68 78 56 70,90, 110,125 60 80 6 125 112 50 68 78 56 70,90, I10,125 62 80 6 125 112 63 81 9~ 70 90, 110, 125 75 95 6 140 125 80 I00 110 85 100,125, 150 92 114 6 160 140 100 120 13(1 105 125.150. 180 112 137 6 180 160 NOTES I Suitable lubricating arrangement shall be provided for the bushes. 2 Diameter d, to be kept tor a minimum length equal to the lowest value ot’/ ( given in the table above ), from the bottom end of the bush tind the top portion may be relieved to d, +0,5nm. 3 According (o IS 2102 t Part I ). ‘) See 5. ~ Bureau of Indian Standards B[S is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote harmonious development ofthe activities of standardization, marking and quality certification of goods and attending to connected matters in the country. CopyrigM BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without theprior.permission inwriting ofBIS. This doesnotpreclude thefree use, inthecourse ofimplementing the standard, of-necessary details, such assymbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publications), BIS. Review of Indian Standards Amendments are issued tostandards asthe need arises onthe basis ofcomments. Standards are also reviewed periodically; astandard along with amendments isreaffirmed when such review indicates that nochanges are needed; ifthe review indicates that changes are needed, it istaken upfor revision. Users of Indian Standards should ascertain that they are inpossession ofthe latest amendments oredition by referring tothe latest issue of ‘BIS Catalogue’ and ‘Standards :Monthly Additions’. This Indian Standard has been developed from Doc :No. MGP/BP 04 (037 I ). Amendments Issued Since Publication Amend No. Date of Issue Text Affected BUREAU OF INDIAN STANDARDS Headquarters: Manak Bhavan, 9Bahadur Shah Zafar Marg, New Delhi 110002 Telephones: 23230131,23233375,2323 9402 Website: www.bis.org.in Regional Offices: Telephones Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg 23237617 NEWDELHI 110002 { 23233841 Eastern : 1/14C.1.T. Scheme VII M,V.1.P.Road, Kankurgachi 23378499,23378561 KOLKATA 700054 { 23378626,23379120 Northern: SCO335-336, Sector 34-A, CHANDIGARH 160022 2603843 { 2609285 Southern: C.1.T.Campus, IVCrossroad, CHENNA1600 113 22541216,22541442 22542519,22542315 { Western : Manakalava. E9MIDC. MaroL Andheri (East) [ 28329295,28327858 MuMBAi400 093 ‘ ‘ ‘ 1 28327891,28327892 Branches: AHMEDABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW.NAGP.UR.NALAGARH.PATNA.PUNE.RAJKOT.THIRUVANANTHAPURAM. VISAKHAPATNAM. Printed atNew India Printing Press,Khurja, India