1、BRITISH STANDARD BS EN ISO 7787-2:2001 Dental rotary instruments Cutters Part 2: Carbide laboratory cutters The European Standard EN ISO 7787-2:2000 has the status of a British Standard. ICS 11.060.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN ISO 7787-2:2001 This Br
2、itish Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 2001 BSI 03-2001 ISBN 0 580 37086 0 National foreword This British Standard is the official English
3、language version of EN ISO 7787-2:2000. It is identical with ISO 7787-2:2000. It supersedes BS EN ISO 7787-2:1995 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee CH/52, Dental instruments, which has the responsibility to: A list of organizations repre
4、sented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British St
5、andards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport t
6、o include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international
7、/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title
8、 page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 10, the annex ZA page and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDA
9、RD NORMEEUROPENNE EUROPISCHENORM ENISO77872 December2000 ICS11.060.20 SupersedesENISO77872:1995 Englishversion DentalrotaryinstrumentsCuttersPart2:Carbidelaboratory cutters(ISO77872:2000) InstrumentsrotatifsdentairesFraisestechniquesPartie 2:Fraisestechniquesencarbure(ISO77872:2000) RotierendeDental
10、instrumenteFrserTeil2:Laborfrser ausHartmetall(ISO77872:2000) ThisEuropeanStandardwasapprovedbyCENon15December2000. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsa
11、ndbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandno
12、tifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFO
13、RSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2000CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO77872:2000EForeword ThetextoftheInternationalStandardISO77872:2000hasbeenp
14、reparedby TechnicalCommitteeISO/TC106“Dentistry“incollaborationwithTechnical CommitteeCEN/TC55“Dentistry“,thesecretariatofwhichisheldbyDIN . ThisEuropeanStandardsupersedesENISO77872:1995. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherby publicationofanidenticaltextorbyendorsemen
15、t,atthelatestbyJune2001,and conflictingnationalstandardsshallbewithdrawnatthelatestbyJune2001 . AccordingtotheCEN/CENELECInternalRegulations,thenationalstandards organizationsofthefollowingcountriesareboundtoimplementthisEuropean Standard:Austria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,
16、 Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom. Endorsementnotice ThetextoftheInternationalStandardISO77872:2000wasapprovedbyCENasa EuropeanStandardwithoutanymodification. NOTE:NormativereferencestoInternationalStandardsarelistedinan
17、nexZA (normative). ENISO77872:2000 Reference number ISO 7787-2:2000(E) INTERNATIONAL STANDARD ISO 7787-2 Fourth edition 2000-12-15 Dental rotary instruments Cutters Part 2: Carbide laboratory cutters Instruments rotatifs dentaires Fraises techniques Partie 2: Fraises techniques en carbure ENISO77872
18、:2000 ii ENISO77872:2000 ISO -78772:(0002)Eiii Contents Page Foreword.iv Introduction.v 1 Scope 1 2 Normative references 1 3 Classification1 4 Symbols 2 5 Requirements.2 5.1 Materials .2 5.2 Shapes 2 5.3 Dimensions and number of blades2 5.4 Toothing8 5.5 Run-out .8 6 Test procedures.8 6.1 Shapes 8 6
19、.2 Dimensions and number of blades8 6.3 Toothing9 6.4 Run-out .9 7 Sampling and acceptance level (AQL) 9 8 Designation of toothing and number of blades9 9 Marking on the instrument10 10 Labelling on the package10 11 Packaging.10 ENISO77872:2000 ISO -78772:(0002)E iv Foreword ISO (the International O
20、rganization 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. Each member body interested in a subject for which a technical committee has been estab
21、lished 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 International Electrotechnical Commission (IEC) on all matters of electrotechnical standardizat
22、ion. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 %
23、 of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO 7787 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 7787-2 was prepared by Techn
24、ical Committee ISO/TC 106, Dentistry, Subcommittee SC 4, Dental instruments. This fourth edition cancels and replaces the third edition (ISO 7787-2:1998), which has been technically revised as follows: addition of designation of toothing; addition of labelling and marking requirements; exclusion of
25、miniature carbide laboratory cutters. ISO 7787 consists of the following parts, under the general title Dental rotary instruments Cutters: Part 1: Steel laboratory cutters Part 2: Carbide laboratory cutters Part 3: Carbide laboratory cutters for milling machines Part 4: Miniature carbide laboratory
26、cutters ENISO77872:2000 ISO -78772:(0002)Ev Introduction This part of ISO 7787 is one of a series of standards relating to dental rotary instruments. The various dimensional and other requirements specified for carbide laboratory cutters are those considered important to ensure the interchangeabilit
27、y and safe usage of these instruments in the dental laboratory. The nominal diameters of the working part listed in Tables 1 to 11 comply with the diameters specified in ISO 2157, Dental rotary instruments Nominal diameters and designation code number. Attention is drawn to ISO 6360, which specifies
28、 a 15-digit number coding system for the identification of dental rotary instruments of all types. ENISO77872:2000 ENISO77872:2000 INTENRATIONAL TSANDADR ISO -78772:(0002)E1 Dental rotary instruments Cutters Part 2: Carbide laboratory cutters 1 Scope This part of ISO 7787 specifies the dimensional a
29、nd other characteristics for the 11 most common carbide cutters, which are predominantly used in the dental laboratory. NOTE Steel laboratory cutters are specified in ISO 7787-1; carbide laboratory cutters for milling machines are specified in ISO 7787-3; miniature carbide laboratory cutters are spe
30、cified in ISO 7787-4. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 7787. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, p
31、arties to agreements based on this part of ISO 7787 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
32、 registers of currently valid International Standards. ISO 1797-1, Dental rotary instruments Shanks Part 1: Shanks made of metals. ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection. ISO 6360-1, De
33、ntal rotary instruments Number coding system Part 1: General characteristics. ISO 6360-2, Dental rotary instruments Number coding system Part 2: Shape and specific characteristics. ISO 8325, Dental rotary instruments Test methods. 3 Classification Dental laboratory cutters are classified according t
34、o the material used for the working part, as steel laboratory cutters or carbide laboratory cutters. Steel laboratory cutters are specified in ISO 7787-1. This part of ISO 7787 as well as ISO 7787-3 and ISO 7787-4 cover carbide laboratory cutters. ENISO77872:2000 ISO -78772:(0002)E 2 4 Symbols For t
35、he purposes of this part of ISO 7787, the following symbols apply. d diameter of working part, head diameter; l length of working part, head length; angle of working part. 5 Requirements 5.1 Materials 5.1.1 Working part The working part shall be made of tungsten carbide. The selection of the type of
36、 tungsten carbide and its treatment are at the discretion of the manufacturer. 5.1.2 Shank The material of the shank shall comply with ISO 1797-1. 5.2 Shapes The shapes of the working part shall be as specified in Figures 1 to 11. Variations of the shapes are permitted within the limited dimensions
37、and the descriptions used in the subclause titles. Testing shall be carried out in accordance with 6.1. 5.3 Dimensions and number of blades 5.3.1 Working part 5.3.1.1 General Dimensions are given in millimetres and angles are given in degrees. The dimensions of the working part shall be as specified
38、 in Figures 1 to 11 as appropriate and Tables 1 to 11 as appropriate. The number of blades shall be as specified in Table 12. Testing shall be carried out in accordance with 6.2. ENISO77872:2000 ISO -78772:(0002)E3 5.3.1.2 Spherical, round Figure 1 Table 1 Dimensions dl Designation of nominal diamet
39、er (Nominal size) 0,3 0,25 040 4 3,5 050 5 4,5 060 6 5,5 5.3.1.3 Inverted truncated conical Figure 2 Table 2 Dimensions dl Designation of nominal diameter (Nominal size) 0,3 0,5 060 6 5,5 8 to 12 ENISO77872:2000 ISO -78772:(0002)E 4 5.3.1.4 Cylindrical (cylinder) Figure 3 Table 3 Dimensions dl Desig
40、nation of nominal diameter (Nominal size) 0,3 0,5 060 6 13,0 5.3.1.5 Cylindrical domed (hemispherical/cylindrical) Figure 4 Table 4 Dimensions dl Designation of nominal diameter (Nominal size) 0,3 0,5 060 6 13,0 070 7 13,0 ENISO77872:2000 ISO -78772:(0002)E5 5.3.1.6 Truncated conical, domed Figure 5
41、 Table 5 Dimensions dl Designation of nominal iameter (Nominal size) 0,3 0,5 040 4 8,0 050 5 10,0 060 6 11,0 070 7 13,0 14 to 18 5.3.1.7 Rounded cone (truncated conical) Figure 6 Table 6 Dimensions dl Designation of nominal dameter (Nominal size) 0,3 0,5 040 4 13,0 050 5 130 060 6 13,0 070 7 14,0 10
42、 to 14 ENISO77872:2000 ISO -78772:(0002)E 6 5.3.1.8 Bud slender (ogivo/ellipsoidal, long) Figure 7 Table 7 Dimensions dl Designation of nominal diameter (Nominal size) 0,3 0,5 050 5 10,0 060 6 12,0 5.3.1.9 Paraboloidal Figure 8 Table 8 Dimensions dl Designation of nominal diameter (Nominal size) 0,3
43、 0,5 060 6 14,0 070 7 14,0 ENISO77872:2000 ISO -78772:(0002)E7 5.3.1.10 Cone (truncated conical) Figure 9 Table 9 Dimensions dl Designation of nominal diameter (Nominal size) 0,3 0,5 060 6 14,0 18 to 22 5.3.1.11 Egg (longitudinal ellipsoidal) Figure 10 Table 10 Dimensions dl Designation of nominal d
44、iameter (Nominal size) 0,3 0,5 060 6 10,0 ENISO77872:2000 ISO -78772:(0002)E 8 5.3.1.12 Pear (hemispherical conical) Figure 11 Table 11 Dimensions dl Designation of nominal diameter (Nominal size) 0,3 0,5 050 5 10,0 060 6 11,0 070 7 12,0 14 to 28 5.3.2 Shank The shank shall be Type 2 as specified in
45、 ISO 1797-1. 5.4 Toothing The toothing of the instruments in Figures 1 to 11 is shown as examples only. The selection of toothing is left to the discretion of the manufacturer. For the designation of toothing, see clause 8 and Table 12. Testing shall be carried out in accordance with 6.3. 5.5 Run-ou
46、t The total indicated run-out shall not exceed 0,08 mm. Testing shall be carried out in accordance with 6.4. 6 Test procedures 6.1 Shapes Determine the shapes by using a shadowgraph or measuring the relevant dimensions in accordance with ISO 8325. 6.2 Dimensions and number of blades Measure the dime
47、nsions in accordance with ISO 8325. Determine the number of blades by visual inspection. ENISO77872:2000 ISO -78772:(0002)E9 6.3 Toothing Determine the type of toothing by visual inspection. 6.4 Run-out Determine the run-out in accordance with ISO 8325. The measurement point shall be at the largest
48、diameter or, for cylindrical cutters, the middle of the working part. 7 Sampling and acceptance level (AQL) The acceptable quality level (AQL) in accordance with ISO 2859-1 shall be 6,5. 8 Designation of toothing and number of blades The toothing shall be designated by any of the following information, or any combination thereof:
