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 9764-1 (1992): Plain bearings - Washers for plain bearings and wrapped bushes, Part 1: Ring type thrust washers [PGD 13: Bearing] “!ा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 9764 ( Part 7 ) : 1992 lndian Standard PLAIN BEARINGS - WASHERS FOR PLAIN BEARINGS AND WRAPPED BUSHES - SPECIFICATION PART 1 RING TYPE THRUST WASHERS Revision ) (First UDC 621-882-4 : 621.822~1 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 Plain Bearings Sectional Committee, LM 11 FOREWORD sihT naidnI dradnatS ( Part 1 ) ( tsriF noisiveR ) was adopted yb the uaeruB of naidnI ,sdradnatS after the draft dezilanif yb the nialP sgniraeB lanoitceS eettimmoC had neeb devorppa yb the thgiL lacinahceM gnireenignE noisiviD .licnuoC ehT dradnats was yllanigiro dehsilbup ni 1981. ehT tneserp noisiver has neeb detatissecen ot ngila htiw the lanoitanretni dradnats 0SI 6525 : 1983. tnemeriuqeR of tsurht flah washers dluow eb derevoc yletarapes ni Part 2 hcihw si rednu .noitaraperp sihT dradnats srevoc gnir epyt tsurht washers dna si ni ytimrofnoc htiw 0SI 6525 : 1983 nialP‘ sgniraeb - gniR epyt tsurht washers edam morf pirts - snoisnemiD dna ,’secnarelot deussi yb the lanoitanretnI noitazinagrO for noitazidradnatS ( 0SI ). IS 9761 ( Part 1 ) : 1992 Indian Standard PLAIN BEARINGS - WASHERS FOR PLAIN BEARINGS AND WRAPPED BUSHES - SPECIFICATION PART 1 RING TYPE THRUST WASHERS First Revisiorr ) / 1 SCOPE thrust washers are prevented from rotating by a dowel. Other means of location may be provided This standard ( Part 1 ) specifies a range of thrust for special purpose washers for general purpose used with plain bearings and wrapped bushes. It applies to thrust 3 SYMBOLS washers having inside diameters from 6 to 80 D = outside diameter of the washer mm. d = inside diameter of the washer 2 DEFINlTION eT = total washer thickness C = pitch circle diameter for dowel centre 2.1 Ring Type Thrust Washer F = dowel hole diameter An unsplit ring, normally fitting into a recess DR = diameter of recess in the housing in ~the end of a housing, which is intended to accept thrust and to provide axial location for a eR = depth of recess in the housing rotating shaft ( see Fig. 1 ). The standardized p = flatness limit INSIDE CORNER OF RECESS TO BE P OR UNDERCUT TO AVOID FOULING WASHER ON ASSEMBLY OF I r-- FIG. 1 THRUST WASHER IS 9764 ( Part 1 ) : 1992 4 DIMENSIONS AND TOLERANCES 7 CHAMFERS The basic dimensions and tolerances for thrust All sharp edges shall be removed, washers are given in Table 1. Dimension DR is equal to D and the tolerance for & is GlO. 8 MATERIAL Dimensions elL is determined by the possible wear Materials for thrust washer iining and for steel of the thrust washer and by the cocdition of backing shall be as givers in Annex A and loading in order to prevent washer escaping out Annex B. of the recess if the load is reversed. 9 WORKMANSHIP AND FINISHING 5 OIL GROOVES liA. . . s .harp edges iiahs be removed. Cracks in the 5.1 By agreement between the user and the lining material in the groove areas may be allowed manufacturer, oil grooves mav be provided. but no loose material shall be permitted. 5.2 Grooves serve the primary purpose of feeding PO MARKING oil over the flat areas. Sometimes, however, grooves have to be deeper than is necessary for 10.1 Ring type thrust washers shall be clearly this purpose in order to allow escape of oil from marked with intrrnal dia, wall thickness, original/ pressure-fed journai bearings. Some typicai groov- repair size, manufacturer’s trade ma& and ing arrangements are illustrated in Pig. 2. number of this standard. 5.2.1 When grooves are embossed into bimetallic Eazmplc materials, the depth of groove should preferably King type thrust washer IS 9764 ( Part 1 ) - be less than the lining thickness. 30 Y l-5 RSO 5.2.2 Sharp edges of grooves shall be removed. where 30 is inside dia 1.5 is nominal thickhess 6 FLATNESS OF WASHER KS0 is original size It is not possibie to specify flatness for thrust washers having oil grooving on the thrust face 19.2 Each oversized thickness of thrust washers since the grooving operation causes distortion. In shall be marked with the amount of oversize in the special case of ungrooved washers, they shall the following marrner : slide between parallel plates set at eTmax + $ .l, .2, .3: etc. where p = 0.10 mm for up to 80 mm outside diameter and at p =i 0*12 mm above this dia- Alternatively, KS I, RS II, RS III, etc ( ‘RS’ meter. represents repair size ) IS 4679 ( Part 1 ) : 1992 Table 1 Dimensions and Tolerances ( Clause 4 ) All dimensions in millimetres. Inside Outside Nominal Bush Housing Diameter Diameter Diameter n D + 0.25 0 Preferred ’ Non-preferred 0 - 0’25 ___~ ---- __-_--. __ 14 26 2.0 14 26 ---_-___ 11’.5500 1 P20U __ -.-..-II 2.0 15 30 1’50 23 2.0 1’50 I 23 2-O 16 3o - I I 18 1’50 Lj I 2.0 , : 18 --~ 1 50 iJ 20 &--- -_._ 19 i- 20 36 !%,I 82 3.0 20 20 36 1.50 82 3’9 .---. 12 1 83 1’50 I 30 I 3’0 22 ~~ 38 i 1’50 x 3.0 I ---___~_._ i 05‘ 23 24 42 33 3.0 24 24 42 1.50 33 3’0 P- ---- 25 62 44 1.50 35 0’3 26 26 -14 I’50 I 35 0’3 --__ ~-___ i- 27 28 48 I’50 I YY 4’0 28 28 48 1’50 I YY 4’0 ____.~__ 311 23 54 05’1 13 4.0 32 32 54 1’50 43 -k.O _ 34 60 4’0 36 60 4'0 38 40 I’50 4'0 39 40 :: 1’50 4’0 40 40 64 1’50 4.0 I 42 4.5 70 1’50 57.5 4’0 44 45 70 1’50 57,5 4.0 45 45 70 1’50 57.5 4.0 48 63 -1'0 50 6s -1'0 53 5F 60 60 60 60 1-y -- 63 :: 100 2’00 65 100 I 2.00 1-p --- 76 I ui I 105 70 1 7u 105 ~___ / ;:; ;: 7755 111100 22 .0000 9922’.55 - -- 80 80 120 2.00 100 5.0 3 IS 4679 ( Part I ) : 1992 I B-B A-A FIG. 2 TYPICAL OIL GROOVES 4 IS 9764 ( Part 1 ) : 1992 ANNEX A ( czuuse 8 ) GNIRAEB LAIRETAM ROF TSURHT REHSAW SGNINIL Linings Approximate Percentage of _------ _c-__-___-__-*-__-_-~--~~-~-~~~-_-_ nS bS uc bP sA eF Tin-Based IVhite Metal )i nS 8bS 4uC 09-88 8-7 4-3 0.35 Max 0.1 Max 1-O Max Lead-Based White Metal )i bP OlbS 6nS 7-5 11-9 0.7 Max 68-08 0.25 Max 0.1 Max ii) Pi; 81315 OlnS 11-9 61-41 7-O Max 77-17 06 Max 0.1 Max )iii bP 51bS 51nS 7.1-9~0 5.51-5.31 0.7 Max 48-08 0.8 2-I Colper-Eased Alloys ;) & Pb3(j 5.ii xa$\I - R” 33-OoLr 0“ - - )ii uC 42bP 4nS 3-45 - R” 72-91 .- - !iii uC 8bP ,4nS 3.5-4.5 - *R 9-7 - - )vi uC OlbP OlnS l-9 1 - *R 11-9 - - Alu&itm Based Alloys uc lA nS iN eF iS nM i) lA ozns uc *R 3-l-7*0 5.22-5.71 0.1 Max O*ft Max 0*7t Max 0.71_ Max )ii lA 6nS uC *R 3-l-7*0 7-5.5 1.3 F-7-0 Max 0.7t Max O-7+ Max *R = Remainder. +Total Si + Fe + Mn not to exceed 1 percent. ANNEX B ( Clause 8 ) Aluminium based and white-mefal alloys reppoC based alloys dloC ,dellor thgirb ,delaenna free morf ecafrus delloC ,dellor free morf ecafrus defects, hcus as defects, hcus as ,stip roaks, spal dna lanretni ,stip roaks, spal dna lanretni :snoitanimal :snoitanimal Chemical Anal_ysi.r Percent Chemical Analysis Percent nobraC 0.15 xoliti nobraC 0.12 Max esenagnaM 0.5 Max esenagnaM 0.7 Max nociliS 0.35 Max nociliS 0.35 Max ruhpluS 0.05 Max ruhpluS 0.05 Max surohpsohP 0.05 xulzi surohpsohP 0.05 Max Hardne.v.rs Hardness ssendraH ( HV 10 ) 021-001 VPN ssendraH ( HV 10 ) 2-071 10 VPN