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 13701 (1993): Dentistry - Dental Rotary Instruments - Test methods [MHD 8: Dentistry] “!ा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 13701 : 1993 IS0 8325 : 1985 YRTSITNED - DENTAL YRATOR INSTRUMENTS - TSET METHODS UDC 616’314 : 681’3’04 I@ BIS 1993 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 June 1993 Price Group 3 : AlIP kntistry Sectional Committee, MHD 8 N’ATIONAL FOREWORD sihT naidnI dradnatS hcihw si lacitnedi htiw 0SI 5238 : 5891 yrtsitneD‘ - latneD rotary instru- ments - tseT ,’sdohtem deussi yb eht lanoitanretnI noitazinagrO rof noitazidradnatS ( 0SI ), saw detpoda yb eht uaeruB fo naidnI sdradnatS no eht noitadnemmocer fo eht yrtsitneD lanoitceS Committee dna lavorppa fo eht lacideM tnempiuqE dna latipsoH gninnalP noisiviD Council. ehT txet fo eht evoba denoitnem 0SI dradnats sah neeb devorppa sa elbatius rof noitacilbup sa naidnI dradnatS tuohtiw .snoitaived niatreC ygolonimret dna snoitnevnoc ,era ,revewoh ton lacitnedi ot esoht desu ni naidnI .sdradnatS noitnettA si ylralucitrap nward ot eht :gniwollof a) Wherever eht sdrow lanoitanretnI‘ ’dradnatS raeppa gnirrefer ot siht ,dradnats yeht should be read sa naidnI‘ .’dradnatS b) Comma ( , ) sah neeb desu sa a lamiced marker elihw ni naidnI ,sdradnatS eht ecitcarp si ot esu a tniop ( . > sa a lamiced marker. nI siht naidnI dradnatS eht gniwollof lanoitanretnI sdradnatS era derrefer .ot daeR ni rieht evitcepser ecalp eht :gniwollof international Standard Indian Standard Degree of Correspondence 0SI 1011‘ lacinhceT sgniward - SI 0008 ( traP 1 ) : 5891 lacirtemoeG lacitnedI lacirtemoeG gnicnarelot - -nareloT secnarelot no lacinhcet sgniward : gnic fo form, ,noitatneiro noitacol Psrt 1 secnareloT fo form, -atneiro dna tuo-nur - ,seitilareneG -inifed ,noit noitacol dna tuo-nur dna ,snoit ,slobmys snoitacidni no etairporppa lacirtemoeg snoitinifed sgniward ( first revision ) 0SI 7971 latneD yrator stnemurtsni - SI 2646 : 2791 gnittiF snoisnemid yllacinhceT sknahS rof latned srub dna srettuc tnelaviuqe 0SI 9582 gnilpmaS serudecorp dna SI 2500 ( traP 1 ) : 3791 gnilpmaS yllacinhceT selbat rof noitcepsni yb setubirtta noitcepsni selbat : traP 1 -cepsnI tnelaviuqe noit yb setubirtta dna yb tnuoc fo stcefed ( first rewsion ) 0SI 3630 latneD‘ toor lanac ’stnemurtsni gniraeppa ni eht evitamron ecnerefer fo siht dradnats seod ton evah eht gnidnopseiroc naidnI .dradnatS ehT yrtsitneD lanoitceS Committee ,sah ,erofereht dediced taht ti si elbatpecca rof esu ni noitcnujnoc htiw siht .dradnats For eht esoprup fo ,gnidiced rehtehw a ralucitrap tnemeriuqer fo siht dradnats si deilpmoc ,htiw eht lanif ,eulav devresbo or ,detaluclac gnisserpxe eht tluser fo a ,tset llahs eb dednuor ffo ni ecnadrocca htiw SI 2 : 0691 seluR‘ rof gnidnuor ffo laciremun seulav ( revised )‘. ehT rebmun fo significant secalp deniater ni eht dednuor ffo eulav dluohs eb eht same sa taht fo eht deificeps eulav ni eht .dradnats IS 13701: 1993 IS0 8325 : 1985 Indian Standard YRTSITNED - DENTAL YRATOR INSTRUMENTS - TSET METHODS 3 Scope and field of application b) dial indicator with flat tungsten carbide blades; This International Standard specifies methods of test for dental c) air gauge; rotary instruments such as burs,’ cutters, diamond instruments and abrasives but excludes root canal instruments. In the rel- d) dial indicator bore gauge. evant product standards reference is made to the methods specified in this International Standard. The measuring device shall be accurate to Cl,01 mm. For the testing of root canal instruments, see IS0 3630. Mechanical measuring devices shall have a measuring force 2 References of < 1,5 N. IS0 1101, Technical drawings - Geometrical tolerancing - In case of dispute, the reference method shall be the tungsten Tolerancing of form, orientation, location and run-out - carbide ring gauge. Generalities, definitions, symbols, indications on drawings. IS0 1797, Dental rotary instruments - Shanks. 3.1.2 Measurement point IS0 2959, Sampling procedures and tables for inspection by at- tributes. On cylindrical instruments, the measurement point shall be the middle of the working part, unless otherwise specified. IS0 3630, Dental foot canal instruments. 3 Test methods 3.1.3 Procedure For burs, cutters and abrasives, make one measurement at the 3.1 Diameter of working part largest diameter of the working part of the instrument. See figures 1 and 2. 3.1.1 Apparatus For diamond instruments, make three measurements at angles One of the following devices or other instruments of equivalent of 120° at the relevant diameter as shown in figure 3. Release accuracy shall be used to determine the diameter of the work- ing part : the force, lift the test piece and rotate it before each measure- ment. Use the same force for each measurement. a) tungsten carbide ring gauges which are regularly checked with mating plugs; Record the average of the three values. 1 IS 13701: 1993 IS0 6325 : 1965 d, + 4 3d,+ d =. 3 Figure 1 - Measurement of Figure 2 - Measurement of burs Figure 3 - Measurement of abrasives and cutters diamond instruments 3.2 Neck diameter 3.3.2 Measurement points The measurement points shall be the points at the ends of the 3.2.1 Apparatus shortest length of the working part, including, where ap- plicable, the coated neck. Dial indicator, with knife-edged tungsten carbide blades of 0,3 f 0,02 mm thickness, or other devices of equivalent accuracy. 3.3.3 Procedure The measuring device shall be accurate to 0.01 mm. Make one measurement of the length of the working part. Mechanical measuring devices shall have a measuring force 3.4 Overall length of < 1,5 N. 3.4.1 Apparatus 3.2.2 Measurement point The apparatus listed in 3.3.1 is suitable. The measurement point shall be the smallest diameter behind the working part. This also applies to diamond instruments with coated necks. 3.4.2 Measurement points The measurement points shall be the points at the ends of 3Z3 Procedure overall length, including tip and shank end. Make one measurement of the neck of the instrument. 3.4.3 Procedure 3.3 Length of working part Make one measurement of the overall length. 3.3.1 Apparatus 3.5 Taper One of the following devices or other instruments of equivalen? accuracy shall be used to determine the length of the working Determine the angle of the tapers by making one measurement part : using a shadowgraph, a toolmaker’s microscope or a com- parator accurate to 1’. a) toolmaker’s microscope; b) calibrated blade-type micrometer; 6.3 Run-out c) gauge; 3.6.1 Apparatus d) shedowgraph.. One of the following devices shall be used to determine the The measuring device shall be accurate to 0.1 mm. total indicated run-out, t: 2 IS 13701 : 1993 IS0 8325 : 1985 3.6.1.1 ~Holding device The lengths It and 12, which are dependent on the shafts and the lengths of the instrument tested, shall be in accordance a) split V-block with adjustable distances It and /2, see with the table. figures 4a) and b); Table - Dimensions I, and 12 b) equivalent device, for example precision chuck. Dimensions in millimetres epyT ( fin act . . . . . 3.6.1.2 Measuring device Dial indicator, dial gauge, comparator, toolmaker’s micro- I 16.5 to-165 I 16 11 scope, shadowgraph or equivalent measuring’device. 3 19 to 30 10 1 I The measuring devices shall be accurate to 0.01 mm. l See the relevant product standard. 1) For the value of the run-out tolerance, refer to the relevant product standard. See also IS0 1101. Figure 4a) - V-block measuring device (measuring the total indicated run-out, I, at the largest diameter of the working part) 3 IS 13701 : 1993 IS0 9325 : 1955 {/lt')lA-B] 11 (2 - J 1 For the value of the run-out tolerance, refer to the relevant product standard. See also IS0 1101. Figure 4b) - V-block measuring device (measuring the tetal indicated run-out, ,t at neck diameter) 3.6.2 Measurement point 3.7.2 Test loads The measurement point for the run-out is dependent on the The loads to be applied, which depend on the shape of the in- shape of the instrument and is given in the relevant product strument, shall be those given in the relevant product standard. standard. It may lie at the largest diameter of the instrument Isee figure 4a)l or just behind the working part of the instru- ment [see figure 4b)l. 3.6.3 Procedure Place the instrument in the holding device (3.6.1.1) and turn it slowly through 360’. Record the lowest and the high st readings. Calculate, the difference and record as the total in- dicated run-out, I (see figure 4). 3.7 Neck strength 3.7.1 Apparatus Apparatus which permits a load to be applied to the free end of the test piece with its long axis held in a chuck at an angle of Figure 5 - Test piece at 22.5O to horizontal the 22.5” to the horizontal. The chuck should enable test pieces of different lengths to be inserted to a depth as describe d in 3.7.3. 4 IS 13701 : 1993 IS0 8325 : 1985 3.7.3 Procedure where Place the test piece in the chuck (3.7.1) os that it is gripped up F is the test load, expressed as a force, in newtons; to the junction of the neck and shank. d, is the nominal head diameter, in millimetres; Rotate the test piece and measure the run-out. d2 is the ncminal neck diameter, in millimetres; Wiih the test piece held in a position such that the load will . deflect the head in the direction of the maximum run-out, apply I is the minimum head length, in millimetres. the load, specified in the relevant product standard and calculated from the following equation, to the tip of the head. NOTE - This equation is used purely to obtain the numerical value of F. It is not balanced with regard to units. 89 x d23 Apply the load F for a period of 5 s. If no fracture occurs, re- F= d, + d2 + I measure the run-out. 5 Reprography Unit, BIS, New Delhi, India