1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 7711-2:2011Dentistry Rotary diamondinstrumentsPart 2: Discs (ISO 7711-2:2011)BS EN ISO 7711-2:2011 BRITISH STANDARDNational forewordThis British Standard is the UK impl
2、ementation of EN ISO 7711-2:2011. It supersedes BS EN ISO 7711-2:1996 which is with-drawn.The UK participation in its preparation was entrusted to Technical Committee CH/106/4, Dental Instruments and Equipment.A list of organizations represented on this committee can be obtained on request to its se
3、cretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 65535 7 ICS 11.060.25 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was
4、 published under the authority of the Standards Policy and Strategy Committee on 31 July 2011.Amendments issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7711-2 July 2011 ICS 11.060.20 Supersedes EN ISO 7711-2:1995English Version Dentistry
5、- Rotary diamond instruments - Part 2: Discs (ISO 7711-2:2011) Mdecine bucco-dentaire - Instruments rotatifs diamants -Partie 2: Disques (ISO 7711-2:2011) Zahnheilkunde - Rotierende Diamantinstrumente - Teil 2: Scheiben (ISO 7711-2:2011) This European Standard was approved by CEN on 30 June 2011. CE
6、N 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 standards may be obtained on app
7、lication 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 and notified to the CEN-CENELEC M
8、anagement 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Net
9、herlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitatio
10、n in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7711-2:2011: EBS EN ISO 7711-2:2011EN ISO 7711-2:2011 (E) 3 Foreword This document (EN ISO 7711-2:2011) has been prepared by Technical Committee ISO/TC 106 “Dentistry“ in collaboration with Technical Committe
11、e 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 the latest by January 2012, and conflicting national standards shall be withdrawn at the latest b
12、y January 2012. 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 any or all such patent rights. This document supersedes EN ISO 7711-2:1995. According to the CEN/CENE
13、LEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuani
14、a, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 7711-2:2011 has been approved by CEN as a EN ISO 7711-2:2011 without any modification. BS EN ISO 7711-2:2011ISO 7711-2:2011(
15、E)Contents PageForeword iv1 Scope 12 Normative references .13 Terms, definitions and symbols 13.1 Terms and definitions .13.2 Symbols .24 Requirements .34.1 Dimensions of discs .34.2 Preferred sizes .44.3 Disc blank 44.4 Run-out .55 Examples of specific shapes for discs 65.1 Disc, very thin, periphe
16、ral and rim cutting .65.2 Disc, thin, peripheral and rim cutting 65.3 Disc, thick, peripheral and rim cutting 75.4 Disc, thin, peripheral and proximal cutting 85.5 Disc, standard, peripheral and proximal cutting 96 Manufacturers information 106.1 Labelling on the package 106.2 Published media 11Bibl
17、iography .12 ISO 2011 All rights reserved iiiBS EN ISO 7711-2:2011ForewordISO (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 c
18、ommittees. Each 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 t
19、he International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft Internatio
20、nal 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 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be th
21、e subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 7711-2 was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee SC 4, Dental instruments.This second edition cancels and replaces the first edition (ISO 7711-2:1992), which
22、has been technically revised. The changes are the following:a) inclusion of general requirements for all discs used commonly in the dental laboratory;b) bore diameter for unmounted discs harmonized with other International Standards to 1,7 mm;c) replacement of inner diameter of diamond covered area
23、by width of diamond coating;d) addition of labelling requirements.ISO 7711 consists of the following parts, under the general title Dentistry Rotary diamond instruments : Part 1: Dimensions, requirements, marking and packaging1) Part 2: Discs Part 3: Grit sizes, designation and colour code1) The int
24、ent is for the main element of the title of Parts 1 and 3 to be aligned, upon revision, with the main element of the title of Part 2.ISO 7711-2:2011(E)iv ISO 2011 All rights reservedBS EN ISO 7711-2:2011INTERNATIONAL STANDARD ISO 7711-2:2011(E)Dentistry Rotary diamond instruments Part 2:Discs1 Scope
25、This part of ISO 7711 specifies requirements for diamond discs used commonly in the dental laboratory for the cutting of dental materials, such as metals, ceramics, plastics or gypsum.In addition, this part of ISO 7711 selects five specific shapes with their specific dimensions.2 Normative reference
26、sThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1797-1, Dentistry Shanks for rotary instrumen
27、ts Part 1: Shanks made of metalsISO 1942, Dentistry VocabularyISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperatureISO 7711-3, Dentistry Diamond rotary instruments Part 3: Grit sizes, designation and colour codeISO 8325:2004, Dentistry Test methods for rotary inst
28、ruments3 Terms, definitions and symbols3.1 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 1942 and ISO 7711-3 and the following apply.3.1.1diamond discdisc partially or totally covered with diamond grit3.1.2discworking part of a rotary instrument with
29、flat round shape, which is intended to be mounted on a shank intended for use in the dental laboratory for the cutting of dental materials, such as metals, ceramics, plastics or gypsumNOTE For shank, see Figure 1.3.1.3disc blankdisc plate without diamond grit ISO 2011 All rights reserved 1BS EN ISO
30、7711-2:2011Key1 handpiece2 mandrel3 discFigure 1 Mounting of disc3.2 SymbolsFor the purposes of this document, the following symbols apply (see Figures 2 and 3).b width of diamond coating;d1outer diameter;d2bore diameter;l1thickness of disc blank with diamond grit;l2thickness of disc blank;l3protrud
31、ing length (see Figure 3);rr circular run-out radial;rx circular run-out axial (lateral).aThe symbol for the circular run-out is the same for the radial run-out, rr, and for the axial run-out, rx.Figure 2 Dimensions for discsISO 7711-2:2011(E)2 ISO 2011 All rights reservedBS EN ISO 7711-2:2011Figure
32、 3 Specification of protruding length4 Requirements4.1 Dimensions of discs4.1.1 Bore diameterThe bore diameter for discs, d2, shall be 170005,+mm.4.1.2 Thickness of disc blankThe thickness of disc blank, l2, shall be at least 0,05 mm.4.1.3 Outer diameter and toleranceThe outer diameter of the disc,
33、d1, and the tolerances for the outer diameter shall be as specified in Table 1.The tolerances for the width of diamond coating shall be as specified in Table 1.Table 1 Outer diameter and tolerancesDimensions in millimetresNominal sizeOuter diameterd1Tolerances for outer diameter of discd1Tolerances
34、for the width of diamond coatingb65 to 100 6,5 to 10 0/+ 0,20,3 100 to 180 10 to 18 0/+ 0,3 180 to 250 18 to 25 0/+ 0,40,5 250 25 0/+ 0,54.1.4 Width of diamond coatingThe width of diamond coating, b, of the disc is at the discretion of the manufacturer.Tolerances for the width of diamond coating sha
35、ll be in accordance with Table 1.4.1.5 Thickness of disc blank with diamond grainThe tolerance for the thickness of disc blank with diamond grain, l1, shall be as specified in Table 2.ISO 7711-2:2011(E) ISO 2011 All rights reserved 3BS EN ISO 7711-2:2011The thickness may vary either on one side or o
36、n both sides of the disc in the area covered with diamond grain.Table 2 Tolerance of thickness of disc blank with diamond grainDimensions in millimetresDisc plate with diamond grainl1Tolerance 0,3 0,03 0,3 0,044.2 Preferred sizes4.2.1 Preferred outer diametersThe preferred ISO sizes for the outer di
37、ameter (disc sizes) for discs are specified in Table 3. Discs with other outer diameters are optional.Table 3 Preferred ISO sizesPreferred nominal sizeOuter diameter1601802002204.2.2 Preferred thickness of disc blank with diamond gritThe preferred thickness of disc blank with diamond grit, l1, is sp
38、ecified in Table 4. Discs with other thickness of disc blank with diamond grit are optional.Table 4 Preferred thickness of disc blank with diamond gritDimensions in millimetresPreferred thickness of disc blank with diamond grit0,150,200,250,300,454.3 Disc blank4.3.1 Material for disc blankThe materi
39、al used for the disc blank shall be stainless steel.ISO 7711-2:2011(E)4 ISO 2011 All rights reservedBS EN ISO 7711-2:2011The type of steel and the treatment of the steel is at the discretion of the manufacturer.4.3.2 Minimum proof strength of disc blankThe minimum proof strength, Rp0,2, of the disc
40、blank shall be as specified in Table 5.Table 5 Minimum proof strength, Rp0,2, of disc blankThickness of disc blankl2mmMinimum proof strengthRp0,2MPa 0,1 1 000 0,1 800The proof strength shall be tested in accordance with ISO 6892-1.4.3.3 Diamond coveringThe grain size distribution and the colour code
41、 used for the diamond covering of the disc shall be in accordance with ISO 7711-3.4.4 Run-out4.4.1 Mounting of discThe disc shall be mounted on a mandrel. The mandrel shall be inserted into a dental or technical handpiece.In order to limit the run-out and the bending of the mandrel on which the disc
42、 is mounted, the recommended protruding shank length, l3(see Figure 3), is specified in Table 6.NOTE 1 The protruding length, l3, is recommended, but not mandatory. It is not associated with the run-out measurement.NOTE 2 For the recommended rotational speed of the disc, see the manufacturers instru
43、ctions for use.Table 6 Recommended protruding length, l3Dimensions in millimetresShankISO 1797-1l3 1Type 1Type 210154.4.2 Circular run-out RadialThe circular run-out radial, rr, of the mounted discs shall be at a maximum of 0,15 mm.The measuring point is the middle of the disc at the periphery. For
44、more details, see ISO 8325:2004, Figure 1.The circular run-out radial shall be tested in accordance with ISO 8325:2004, 5.8.4.4.3 Circular run-out AxialThe circular run-out axial (lateral), rx, of the mounted discs shall be at a maximum of 0,15 mm.ISO 7711-2:2011(E) ISO 2011 All rights reserved 5BS
45、EN ISO 7711-2:2011The measuring point is at the top side of the disc at the periphery.The circular run-out axial shall be tested with a suitable measuring method.5 Examples of specific shapes for discs5.1 Disc, very thin, peripheral and rim cutting5.1.1 These discs shall comply with Figure 4 and Tab
46、le 7.5.1.2 Minimum proof strength, Rp0,2: 1 000 MPa.Key1 shank in accordance with ISO 1797-1Figure 4 Disc, very thin, peripheral and rim cuttingTable 7 Dimensions and tolerances for discs, very thin, peripheral and rim cuttingDimensions in millimetresNominal sized1b l1l2tol. tol. tol. tol.140 14+0 3
47、0,2 0,30,15 0,03 0,05 0,005160 16 3180 18 3200 20+0 40,3 0,5220 22 35.2 Disc, thin, peripheral and rim cutting5.2.1 These discs shall comply with Figure 5 and Table 8.ISO 7711-2:2011(E)6 ISO 2011 All rights reservedBS EN ISO 7711-2:20115.2.2 Minimum proof strength, Rp0,2: 1 000 MPa.Key1 shank in acc
48、ordance with ISO 1797-1Figure 5 Disc, thin, peripheral and rim cuttingTable 8 Dimensions and tolerances for discs, thin, peripheral and rim cuttingDimensions in millimetresNominal sized1b l1l2tol. tol. tol. tol.160 16+0 30,1,5 0,30,3 0,03 0,1 0,01180 18 1,5200 20+0 40,1,5 0,5220 22 1,5250 25 25.3 Di
49、sc, thick, peripheral and rim cutting5.3.1 These discs shall comply with Figure 6 and Table 9.5.3.2 Minimum proof strength, Rp0,2: 800 MPa.ISO 7711-2:2011(E) ISO 2011 All rights reserved 7BS EN ISO 7711-2:2011Key1 shank in accordance with ISO 1797-1Figure 6 Disc, thick, peripheral and rim cuttingTable 9 Dimensions and tolerances for discs, thick, peripheral and rim cuttingDimensions in millimetresNominal sized1b l1l2tol. tol. tol. tol.160 16+0 3
