SIST EN ISO 7786:2002

• Status: Published
• Publication Date: 30-Apr-2002
• ICS: 11.060.25 - Dental instruments
• Technical Committee: VAZ - Healthcare
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-May-2002
• Due Date: 01-May-2002
• Completion Date: 01-May-2002
• Ref Project: EN ISO 7786:2001 - Dental rotary instruments - Laboratory abrasive instruments (ISO 7786:2001)

• Replaces: SIST EN 27786:2000 - Dental rotary instruments - Laboratory abrasive instruments (ISO 7786:1990)
• Effective Date: 01-May-2002
• Refers: SIST ISO 2859-1:2003 - Sampling procedures for inspection by attributes -- Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
• Effective Date: 25-Aug-2026
• Refers: SIST EN 13141-7:2004 - Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 7: Performance testing of a mechanical supply and exhaust ventilation units (including heat recovery) for mechanical ventilation systems intended for single family dwellings
• Effective Date: 28-Jan-2026
• Refers: SIST EN 12868:2002 - Child use and care articles - Methods for determining the release of N-Nitrosamines and N-Nitrosatable substances from elastomer or rubber teats and soothers
• Effective Date: 28-Jan-2026
• Refers: SIST EN 12527:2000 - Castors and wheels - Test methods and apparatus
• Effective Date: 28-Jan-2026
• Refers: SIST EN 196-1:1995 - Methods of testing cement - Part 1: Determination of strength
• Effective Date: 28-Jan-2026

SIST EN ISO 7786:2002 is the Slovenian adoption of EN ISO 7786:2001 and ISO 7786:2001 for dental rotary instruments. It specifies the material, dimensions, shape families, test methods, sampling level, marking, labelling and packaging guidance for laboratory abrasive instruments used for grinding in the dental laboratory.

What does SIST EN ISO 7786:2002 specify?

SIST EN ISO 7786:2002 specifies requirements for the six most commonly available shapes of ceramic bonded abrasive instruments used in dental laboratory grinding. It is a product standard for manufacturers, test laboratories, purchasers and quality staff who need a common basis for checking form, size and identification.

The document is organized into clauses for scope, normative references, symbols, requirements, test procedures, sampling and acceptance quality level (AQL), manufacturer’s instructions, marking, labelling and packaging. Annex ZA gives the European publications that correspond to the normative references.

Part of the document	What it covers
Clause 1	Scope
Clause 2	Normative references
Clause 3	Symbols
Clause 4	Requirements
Clause 5	Test procedures
Clause 6	Sampling and acceptance quality level (AQL)
Clause 7	Manufacturer’s instructions
Clause 8	Marking on abrasive instruments
Clause 9	Labelling
Clause 10	Packaging
Annex ZA	Normative references to international publications with European publications
Bibliography	Related standards cited for context

What are the key requirements of SIST EN ISO 7786:2002?

SIST EN ISO 7786:2002 focuses on the working part material, the permitted shapes and dimensions, the allowed run-out, and the information that must accompany the product. In practice, these requirements help a manufacturer build a consistent instrument and help a buyer or inspector check whether a batch matches the standard.

Materials, shapes and dimensions

• Clause 4.1 requires the working part to be made of abrasive materials, while the choice and treatment of that abrasive material are left to the manufacturer. This matters because the standard controls the functional form of the instrument without prescribing one specific abrasive recipe.
• Clause 4.1 also requires the shank material to comply with ISO 1797-1, and Clause 4.3 states that the shank shall be Type 2 in accordance with ISO 1797-1. This gives the user a defined connection interface and supports interchangeability.
• Clause 4.2 limits the product to the shapes shown in Figures 1 to 10, with permitted variations only within the stated dimensions and descriptions. In practice, suppliers can offer the listed form families, but not arbitrary shapes.
• Clause 4.3 states that dimensions are given in millimetres and angles in degrees, and that the working part and overall length shall match the relevant figures and tables. That tells designers and inspectors exactly which measurements to check.

Shape families and dimensional control

• Clause 4.4 groups the instruments into shape families: spherical, inverted truncated conical, inverted conical, cylindrical, knife-edge and truncated conical. This grouping matters because shape determines how the instrument is used in the dental laboratory.
• The clause then divides some families into subtypes such as short, standard, regular and long. For a buyer, that means the designation on the product must match the intended geometry, not just the general family name.
• The tables associated with Clause 4.4 provide the nominal sizes and permitted proportions for each shape. Manufacturers use those tables to design and label the product, and inspectors use them to verify size.

Run-out and test methods

• Clause 4.5 sets a maximum run-out of 0,3 mm. Run-out is a practical check on rotational accuracy, so this limit helps control vibration and consistency in use.
• Clause 5.1 says shape is determined with a shadowgraph or by measuring the relevant dimensions in accordance with ISO 8325. This gives a clear inspection method instead of relying only on visual judgement.
• Clause 5.2 requires dimensions to be measured in accordance with ISO 8325, and Clause 5.3 requires run-out to be determined in accordance with ISO 8325. The measurement point is the largest diameter, or the middle of the working part for the cylindrical form.

Sampling, instructions and product information

• Clause 6 sets the AQL at 6,5 in accordance with ISO 2859-1. In practice, that tells quality teams how to plan lot-by-lot inspection for acceptance.
• Clause 7 requires the manufacturer to provide information on maximum rotational speed. This is important for safe use because the user needs a speed limit before putting the instrument into service.
• Clause 8 allows marking on the abrasive instrument to contain information on the abrasive material. That helps traceability and identification when tools are separated from their packaging.

Labelling and packaging

• Clause 9 requires package labelling to include the manufacturer or distributor name or trade mark, the abrasive material, the shank type, the shape number, specific characteristics, the nominal diameter or nominal size, and the lot number. This is the main identification data set for purchasing, traceability and stock control.
• Clause 9 also says the information should preferably follow the appropriate part of ISO 6360. That links the product description to a common dental rotary instrument coding system.
• Clause 10 leaves packaging to the manufacturer’s discretion. The standard therefore controls the identification and technical description more than the outer pack format.

What terms does SIST EN ISO 7786:2002 define?

SIST EN ISO 7786:2002 uses a small set of core terms and symbols that matter for inspection and labelling.

• Working part - The abrasive portion of the instrument that does the grinding work.
• Shank - The part that fits into the holder or machine, and whose material and type are tied to ISO 1797-1.
• Run-out - The rotational deviation measured on the instrument, limited here to 0,3 mm.
• Acceptance quality level (AQL) - The quality level used for sampling and lot acceptance under ISO 2859-1.
• Nominal diameter / nominal size - The designated size used in the tables and on the label to identify the product family.
• Shape number - The coded shape identifier used with ISO 6360-2 on labelling.
• Specific characteristics - Additional coded information used to describe the instrument beyond shape and size.
• Symbols d, l and α - Clause 3 uses symbols for the working-part diameter, lengths and the working-part angle so the dimensional tables can be read consistently.

Who uses SIST EN ISO 7786:2002?

SIST EN ISO 7786:2002 is used by manufacturers of dental rotary instruments, especially suppliers of laboratory abrasive instruments, because it defines the product geometry, shank type and required product information. It is also used by quality control teams and test laboratories that measure shape, dimensions and run-out against the specified methods.

Dental laboratories and their purchasers use it to compare products and check that the correct shape, size and speed information are supplied. Distributors and compliance staff use it for labelling, traceability and lot acceptance.

What changed in SIST EN ISO 7786:2002 from the previous edition?

SIST EN ISO 7786:2002 is the third edition of ISO 7786 and it cancels and replaces ISO 7786:1990. The foreword states these technical changes: a spherical shape was added, nominal size 031 was added for the truncated conical form, and new requirements were added for manufacturer’s instructions, marking and labelling.

The European adoption also supersedes EN 27786:1991, and the Slovenian standard replaces SIST EN 27786:2000.

Which standards are used with SIST EN ISO 7786:2002?

SIST EN ISO 7786:2002 cites these standards in its normative references and related material:

Standard	What it contributes
ISO 1797-1	Requirements for metal shanks, including the Type 2 shank used here
ISO 2859-1	Sampling procedures by attributes and the AQL basis for lot inspection
ISO 6360-2	Shape and specific characteristics coding for dental rotary instruments
ISO 8325	Test methods used for shape, dimensions and run-out
ISO 2157	Nominal diameters referenced in the introduction
ISO 6360-1	General characteristics of the dental rotary instrument numbering system

Annex ZA maps the normative references to the relevant European publications.

What does the SIST EN ISO 7786:2002 document contain?

SIST EN ISO 7786:2002 contains Figures 1 to 10 and Tables 1 to 10 that set out the six shape families and their nominal sizes and proportions. It also contains the test procedures in Clause 5 for checking shape, dimensions and run-out, including the use of a shadowgraph or ISO 8325 measurement methods.

Clause 6 gives the AQL for lot inspection, while Clauses 7 to 10 cover the information the manufacturer must provide, the permitted marking on the instrument, the required labelling on the package and the packaging approach. Annex ZA provides the European publication references for the standards cited in the body of the text.

SLOVENSKI STANDARD
01-maj-2002
1DGRPHãþD
SIST EN 27786:2000
Dental rotary instruments - Laboratory abrasive instruments (ISO 7786:2001)
Dental rotary instruments - Laboratory abrasive instruments (ISO 7786:2001)
Rotierende Dentalinstrumente - Laborschleifinstrumente (ISO 7786:2001)
Instruments rotatifs dentaires - Instruments abrasifs de laboratoire (ISO 7786:2001)
Ta slovenski standard je istoveten z: EN ISO 7786:2001
ICS:
11.060.25 =RERWHKQLþQLLQVWUXPHQWL Dental instruments
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 7786
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2001
ICS 11.060.20 Supersedes EN 27786:1991
English version
Dental rotary instruments - Laboratory abrasive instruments
(ISO 7786:2001)
Instruments rotatifs dentaires - Instruments abrasifs de Rotierende Dentalinstrumente - Laborschleifinstrumente
laboratoire (ISO 7786:2001) (ISO 7786:2001)
This European Standard was approved by CEN on 1 April 2001.
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
standards may be obtained on application to the 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7786:2001 E
worldwide for CEN national Members.

Page 2
Foreword
Corrected 2001-06-13
The text of the International Standard ISO 7786:2001 has been 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 supersedes EN 27786:1991.
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 October 2001, and conflicting national
standards shall be withdrawn at the latest by October 2001.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.
Endorsement notice
The text of the International Standard ISO 7786:2001 was approved by CEN as a European
Standard without any modification.
NOTE: Normative references to International Standards are listed in annex ZA (normative).

Page 3
Annex ZA (normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions
of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications,
indicated by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 1797-1 1992 Dental rotary instruments – Shanks – EN ISO 1797-1 1995
Part 1: Shanks made of metals
ISO 6360-2 1986 Dentistry - Dental rotary instruments - EN 26360-2 1991
Number coding system - Part 2: Shape
and specific characteristics -
Addendum 1
ISO 8325 1985 Dentistry - Dental rotary instruments - EN 28325 1990
Test methods
INTERNATIONAL ISO
STANDARD 7786
Third edition
2001-04-01
Dental rotary instruments — Laboratory
abrasive instruments
Instruments rotatifs dentaires — Instruments abrasifs de laboratoire
Reference number
ISO 7786:2001(E)
©
ISO 2001
ISO 7786:2001(E)
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ISO 7786:2001(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Normative references .1
3 Symbols .1
4 Requirements.1
4.1 Materials .1
4.2 Shapes .2
4.3 Dimensions.2
4.4 Specifications for dental laboratory abrasive instruments.2
4.5 Run-out .7
5 Test procedures.7
5.1 Shapes .7
5.2 Dimensions.7
5.3 Run-out .7
6 Sampling and acceptance level (AQL) .7
7 Manufacturer's instructions.8
8 Marking on abrasive instruments .8
9 Labelling .8
10 Packaging.8
Bibliography.9
ISO 7786:2001(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
me
...