BS EN ISO 7787-1-2016 Dentistry Laboratory cutters Steel laboratory cutters《牙科 实验室刀具 钢制实验室刀具》.pdf

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1、BS EN ISO 7787-1:2016Dentistry Laboratory cuttersPart 1: Steel laboratory cutters (ISO7787-1:2016)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 7787-1:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO7787-1:201

2、6. It supersedes BS 6828-8.1:1987 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee CH/106/4, Dental Instruments and Equipment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purpo

3、rt to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 87561 8ICS 11.060.25Compliance with a British Standard cannot confer immunity fromlegal obligations.

4、This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2016.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7787-1 May 2016 ICS 11.060.20 Supersedes EN 27787-1:1990English Version D

5、entistry - Laboratory cutters - Part 1: Steel laboratory cutters (ISO 7787-1:2016) Mdecine bucco-dentaire - Fraises de laboratoire - Partie 1: Fraises de laboratoire en acier (ISO 7787-1:2016) Zahnheilkunde - Laborfrser - Teil 1: Laborfrser aus Stahl (ISO 7787-1:2016) This European Standard was appr

6、oved by CEN on 15 April 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

7、standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language a

8、nd notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hung

9、ary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENEL

10、EC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7787-1:2016 EBS EN ISO 7787-1:2016EN ISO 7787-1:2016 (E) 3 European foreword This document (EN ISO 7787-1:2016) has be

11、en prepared by Technical Committee ISO/TC 106 “Dentistry” in collaboration with Technical Committee CEN/TC 55 “Dentistry” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at

12、 the latest by November 2016, and conflicting national standards shall be withdrawn at the latest by November 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying a

13、ny or all such patent rights. This document supersedes EN 27787-1:1990. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denma

14、rk, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement not

15、ice The text of ISO 7787-1:2016 has been approved by CEN as EN ISO 7787-1:2016 without any modification. BS EN ISO 7787-1:2016ISO 7787-1:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms, definitions and symbols 13.1 Terms and definitions . 13.2 Symbols . 24 Material 25 Dime

16、nsions and number of blades 25.1 Round (spherical) . 25.2 Cylindrical, double domed 35.3 Egg . 35.4 Oval, transverse 35.5 Bud, rounded 45.6 Bud 45.7 Pear . 55.8 Bud, slender . 55.9 Wheel 66 Run-out . 67 Sampling 68 Designation code number . 79 Marking 7Bibliography 8 ISO 2016 All rights reserved iii

17、Contents PageBS EN ISO 7787-1:2016ISO 7787-1:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Eac

18、h member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the Internation

19、al Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different

20、types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not

21、 be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is inf

22、ormation given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see

23、the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 106, Dentistry, Subcommittee SC 4, Dental instruments.This second edition cancels and replaces the first edition (ISO 7787-1:1984), which has been technically revised.ISO 7787 consists of the

24、 following parts, under the general title Dentistry Laboratory cutters: Part 1: Steel laboratory cutters Part 2: Carbide laboratory cutters Part 3: Tungsten carbide cutters for milling machines Part 4: Miniature carbide laboratory cuttersiv ISO 2016 All rights reservedBS EN ISO 7787-1:2016ISO 7787-1

25、:2016(E)IntroductionThis part of ISO 7787 is one of a series of International Standards relating to dental rotary instruments.The various dimensional and other requirements specified for steel cutters are those considered important to ensure the interchangeability of these instruments. ISO 2016 All

26、rights reserved vBS EN ISO 7787-1:2016BS EN ISO 7787-1:2016Dentistry Laboratory cutters Part 1: Steel laboratory cutters1 ScopeThis part of ISO 7787 specifies dimensional and other requirements for the nine most commonly used steel cutters which are predominantly used in the dental laboratory.Other

27、characteristics of laboratory cutters, for example, spiralled blades or cross-cut, are not covered by this part of ISO 7787.NOTE These cutters are also used in podiatry.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensab

28、le for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 17971), Dentistry Shanks for rotary and oscillating instrumentsISO 1942, Dentistry VocabularyISO 2157, Dentistry

29、Nominal diameters and designation code numbers for rotary instrumentsISO 6360-3, Dentistry Number coding system for rotary instruments Part 3: Specific characteristics of burs and cuttersISO 8325, Dentistry Test methods for rotary instruments3 Terms, definitions and symbolsFor the purposes of this d

30、ocument, the terms and definitions given in ISO 1942, ISO 6360-3, and the following apply.3.1 Terms and definitions3.1.1laboratory cuttercutter designed for use with dental materials in the dental laboratory3.1.2dental laboratoryfacility where dental technical procedures complementing dental clinica

31、l treatment are carried outSOURCE: ISO 1942:2009, 2.77 1) To be published.INTERNATIONAL STANDARD ISO 7787-1:2016(E) ISO 2016 All rights reserved 1BS EN ISO 7787-1:2016ISO 7787-1:2016(E)3.2 SymbolsFor the purposes of this part of ISO 7787, the following symbols apply:d diameter of the working part, h

32、ead diameter;l length of the working part, head length.4 MaterialThe shaft and the working part shall be made of steel.The selection of the type of steel and the treatment given to it shall be left to the discretion of the manufacturer.5 Dimensions and number of bladesAll dimensions are in millimetr

33、es.The dimensions, measured as described in ISO 8325, shall be as specified in Tables 1 to 9 and as shown in Figures 1 to 9.The shank shall be Type 2 of ISO 1797.The shank length shall be (38 1) mm.In this part of ISO 7787, the laboratory cutters are differentiated according to the shape of the head

34、 of the laboratory cutters.5.1 Round (spherical)Figure 1 RoundTable 1 Round Dimensions and number of bladesDimensions in millimetresNominal size d +0,15 -0,25l 0,25Number of blades min.040 4 3,7 8050 5 4,7 10060 6 5,8 12070 7 6,8 14080 8 7, 8 162 ISO 2016 All rights reservedBS EN ISO 7787-1:2016ISO

35、7787-1:2016(E)5.2 Cylindrical, double domedFigure 2 CylindricalTable 2 Cylindrical Dimensions and number of bladesDimensions in millimetresNominal size d +0,15 -0,25l 0,25Number of blades min.040 4 9 8050 5 10 10060 6 11 12070 7 12 14080 8 13 165.3 EggFigure 3 EggTable 3 Egg Dimensions and number of

36、 bladesDimensions in millimetresNominal size d +0,15 -0,25l 0,25Number of blades min.040 4 9 8050 5 10 10060 6 11 12070 7 12 14080 8 13 165.4 Oval, transverseFigure 4 Oval, transverse ISO 2016 All rights reserved 3BS EN ISO 7787-1:2016ISO 7787-1:2016(E)Table 4 Oval, transverse Dimensions and number

37、of bladesDimensions in millimetresNominal size d +0,15 -0,25l 0,25Number of blades min.040 4 2,5 8050 5 3,0 10060 6 3,5 12070 7 4,0 14080 8 4,5 165.5 Bud, roundedNOTE = 14 to 18.Figure 5 Bud, roundedTable 5 Bud, rounded Dimensions and number of bladesDimensions in millimetresNominal size d +0,15 -0,

38、25l 0,25Number of blades min.040 4 8 8050 5 9,5 10060 6 11,0 12070 7 12,5 14080 8 14,0 165.6 BudNOTE A small flat area is allowed at the tip of no more than 0,1 mm.Figure 6 Bud4 ISO 2016 All rights reservedBS EN ISO 7787-1:2016ISO 7787-1:2016(E)Table 6 Bud Dimensions and number of bladesDimensions i

39、n millimetresNominal size d +0,15 -0,25l0,25Number of blades min.040 4 7 8050 5 8 10060 6 9 12070 7 10 14080 8 11 165.7 PearNOTE = 14 to 18.Figure 7 PearTable 7 Pear Dimensions and number of bladesDimensions in millimetresNominal size d +0,15 -0,25l 0,25Number of blades min.040 4 9 8050 5 10 10060 6

40、 11 12070 7 12 14080 8 13 165.8 Bud, slenderNOTE A small flat area is allowed at the tip of no more than 0,1 mm.Figure 8 Bud, slender ISO 2016 All rights reserved 5BS EN ISO 7787-1:2016ISO 7787-1:2016(E)Table 8 Bud, slender Dimensions and number of bladesDimensions in millimetresNominal size d +0,15

41、 -0,25l 0,25Number of blades min.040 4 10 8050 5 11 10060 6 12 12070 7 13 13080 8 14 145.9 WheelFigure 9 WheelTable 9 Wheel Dimensions and number of bladesDimensions in millimetresNominal size d +0,15 -0,25l 0,25Number of blades min.100 10 3,5 18125 12,5 3,5 22140 14 4,0 26160 16 4,0 306 Run-outThe

42、total indicated run-out determined as described in ISO 8325 shall not exceed 0,12 mm.Record for each cutting edge the readings and sort the highest and the lowest for further analysis.7 SamplingTake randomly 10 instruments from validation batch and test them according to the method described in Clau

43、se 6. If eight or less samples pass, the product fails.If nine samples pass, test 10 additional samples. When 10 additional samples are to be tested, all 10 shall pass for the product to comply.6 ISO 2016 All rights reservedBS EN ISO 7787-1:2016ISO 7787-1:2016(E)8 Designation code numberThe designat

44、ion code numbers for laboratory cutters shall be in accordance with ISO 2157.9 MarkingLaboratory cutters shall be marked with the following information:a) trade name and/or trade mark of the manufacturer;b) nominal size designation. ISO 2016 All rights reserved 7BS EN ISO 7787-1:2016ISO 7787-1:2016(

45、E)Bibliography1 ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection8 ISO 2016 All rights reservedBS EN ISO 7787-1:2016This page deliberately left blankThis page deliberately left blankBSI is the nat

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