oSIST prEN ISO 3611:2022

Geometrical product specifications (GPS) - Dimensional measuring equipment: Micrometers for external measurements - Design and metrological characteristics (ISO/DIS 3611:2022)

Geometrische Produktspezifikation (GPS) – Längenmessgeräte: Bügelmessschrauben – Konstruktionsmerkmale und messtechnische Merkmale (ISO/DIS 3611:2022)

Dieses Dokument enthält die wichtigsten Konstruktionsmerkmale und messtechnischen Merkmale für Bügelmessschrauben:
   mit Skalenanzeige;
   mit Ziffernanzeige: mechanische oder elektronische Ziffernanzeige.

Spécification géométrique des produits (GPS) - Équipement de mesurage dimensionnel: Micromètres d'extérieur - Caractéristiques de conception et caractéristiques métrologiques (ISO/DIS 3611:2022)

Specifikacija geometrijskih veličin izdelka (GPS) - Oprema za merjenje dolžin: mikrometri za zunanje meritve - Konstrukcijske in meroslovne značilnosti (ISO/DIS 3611:2022)

General Information

• Status: Not Published
• Public Enquiry End Date: 08-Aug-2022
• ICS: 17.040.30 - Measuring instruments
• ICS: 17.040.40 - Geometrical Product Specification (GPS)
• Technical Committee: ISEL - Mechanical elements
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 25-May-2022
• Due Date: 12-Oct-2022
• Completion Date: 09-Aug-2022
• Ref Project: prEN ISO 3611 - Geometrical product specifications (GPS) - Dimensional measuring equipment - Design and metrological characteristics of micrometers for external measurements (ISO/FDIS 3611:2023)

Relations

• Revised: SIST EN ISO 3611:2011 - Geometrical product specifications (GPS) - Dimensional measuring equipment: Micrometers for external measurements - Design and metrological characteristics (ISO 3611:2010)
• Effective Date: 27-Feb-2019
• Revised: SIST EN ISO 3611:2011 - Geometrical product specifications (GPS) - Dimensional measuring equipment: Micrometers for external measurements - Design and metrological characteristics (ISO 3611:2010)
• Effective Date: 18-Jan-2023
• Revised: SIST EN ISO 3611:2011 - Geometrical product specifications (GPS) - Dimensional measuring equipment: Micrometers for external measurements - Design and metrological characteristics (ISO 3611:2010)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 3611:2022
01-julij-2022
Specifikacija geometrijskih veličin izdelka (GPS) - Oprema za merjenje dolžin:

mikrometri za zunanje meritve - Konstrukcijske in meroslovne značilnosti (ISO/DIS

3611:2022)
Geometrical product specifications (GPS) - Dimensional measuring equipment:
Micrometers for external measurements - Design and metrological characteristics
(ISO/DIS 3611:2022)
Geometrische Produktspezifikation (GPS) – Längenmessgeräte: Bügelmessschrauben –
Konstruktionsmerkmale und messtechnische Merkmale (ISO/DIS 3611:2022)

Spécification géométrique des produits (GPS) - Équipement de mesurage dimensionnel:

Micromètres d'extérieur - Caractéristiques de conception et caractéristiques
métrologiques (ISO/DIS 3611:2022)
Ta slovenski standard je istoveten z: prEN ISO 3611
ICS:
17.040.30 Merila Measuring instruments
17.040.40 Specifikacija geometrijskih Geometrical Product
veličin izdelka (GPS) Specification (GPS)
oSIST prEN ISO 3611:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 3611:2022
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oSIST prEN ISO 3611:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 3611
ISO/TC 213 Secretariat: BSI
Voting begins on: Voting terminates on:
2022-05-18 2022-08-10
Geometrical product specifications (GPS) — Dimensional
measuring equipment: Micrometers for external
measurements — Design and metrological characteristics

Spécification géométrique des produits (GPS) — Équipement de mesurage dimensionnel: Micromètres

d'extérieur — Caractéristiques de conception et caractéristiques métrologiques
ICS: 17.040.30
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 3611:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
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oSIST prEN ISO 3611:2022
ISO/DIS 3611:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on

the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below

or ISO’s member body in the country of the requester.
ISO copyright office
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Published in Switzerland
© ISO 2022 – All rights reserved
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oSIST prEN ISO 3611:2022
ISO/DIS 3611:2022(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 1

4 Design characteristics ................................................................................................................................................................................... 2

4.1 General design and nomenclature......................................................................................................................................... 2

4.2 Dimensions ................................................................................................................................................................................................ 3

4.3 Types of indicating devices.......................................................................................................................................................... 4

4.3.1 General ........................................................................................................................................................................................ 4

4.3.2 Analogue indicating devices .................................................................................................................................... 4

4.3.3 Digital indicating devices ........................................................................................................................................... 4

4.4 Frame .............................................................................................................................................................................................................. 4

4.5 Measuring force limiting device ............................................................................................................................................. 4

5 Metrological characteristics ................................................................................................................................................................... 6

5.1 General ........................................................................................................................................................................................................... 6

5.2 Rated operating conditions ......................................................................................................................................................... 6

5.3 Reference point ...................................................................................................................................................................................... 6

5.4 Test methods ............................................................................................................................................................................................ 6

5.5 Full surface contact error, J (limited by J ) ............................................................................................................. 6

MPE

5.5.1 General ........................................................................................................................................................................................ 6

5.5.2 Test point selection .......................................................................................................................................................... 7

5.6 Variation in length error, V (limited by V ) ............................................................................................................ 7

MPE

5.6.1 General ........................................................................................................................................................................................ 7

5.6.2 Number of tests ................................................................................................................................................................... 7

5.6.3 Testing with optical parallels ................................................................................................................................. 7

5.7 Measuring forces (limited by MPL) ...................................................................................................................................... 8

5.8 MPE and MPL values .......................................................................................................................................................................... 8

6 Determination of conformance to specifications ..........................................................................................................11

6.1 General ........................................................................................................................................................................................................ 11

6.2 Measurement uncertainty ........................................................................................................................................... .............. 11

6.3 Decision rule .......................................................................................................................................................................................... 11

7 Marking ........................................................................................................................................... ............................................................................11

Annex A (informative) Calibration guidelines for metrological characteristics...............................................12

Annex B (informative) Notes on use ..................................................................................................................................................................13

Annex C (informative) Relation to the GPS matrix model ..........................................................................................................14

Bibliography .............................................................................................................................................................................................................................15

iii
© ISO 2022 – All rights reserved
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oSIST prEN ISO 3611:2022
ISO/DIS 3611:2022(E)
Foreword

ISO (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. 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 the International 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 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 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 information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product

specifications and verification.

This third edition cancels and replaces the second edition (ISO 3611:2010), which has been technically

revised.
The main changes compared to the previous edition are as follows:

— general design characteristics have been removed and reference to ISO 14978:2018 included;

— metrological characteristics have been clarified and modified;
— requirements for test methods have been included;
— classification system of maximum permissible errors has been added.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www.iso.org/members.html.
© ISO 2022 – All rights reserved
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oSIST prEN ISO 3611:2022
ISO/DIS 3611:2022(E)
Introduction

This document is a geometrical product specification (GPS) standard and is to be regarded as a general

GPS standard (see ISO 14638). It influences the chain links for measuring equipment and calibration on

size and distance in the general GPS matrix (see Annex C).

The ISO/GPS Masterplan given in ISO 14638 gives an overview of the ISO/GPS system of which this

document is a part. The fundamental rules of ISO/GPS given in ISO 8015 apply to this document and

the default decision rules given in ISO 14253-1 apply to specifications made in accordance with this

document, unless otherwise indicated; see ISO/TR 14253-6 for additional information on the selection

of alternative decision rules.

For more detailed information on the relation of this document to other standards and the GPS matrix

model, see Annex C.
© ISO 2022 – All rights reserved
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oSIST prEN ISO 3611:2022
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oSIST prEN ISO 3611:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 3611:2022(E)
Geometrical product specifications (GPS) — Dimensional
measuring equipment: Micrometers for external
measurements — Design and metrological characteristics
1 Scope

This document provides the most important design and metrological characteristics of micrometers for

external measurements:
— with analogue indication;
— with digital indication: mechanical or electronic digital display.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 14253-1, Geometrical product specifications (GPS) — Inspection by measurement of workpieces and

measuring equipment — Part 1: Decision rules for verifying conformity or nonconformity with specifications

ISO 14253-5, Geometrical product specifications (GPS) — Inspection by measurement of workpieces and

measuring equipment — Part 5: Uncertainty in verification testing of indicating measuring instruments

ISO/TR 14253-6, Geometrical product specifications (GPS) — Inspection by measurement of workpieces

and measuring equipment — Part 6: Generalized decision rules for the acceptance and rejection of

instruments and workpieces

ISO 14978:2018, Geometrical product specifications (GPS) — General concepts and requirements for GPS

measuring equipment

ISO 3650, Geometrical Product Specifications (GPS) — Length standards — Gauge blocks

ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in

measurement (GUM: 1995)

ISO/IEC Guide 99:2007, International vocabulary of metrology — Basic and general concepts and

associated terms (VIM)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 14978:2018,

ISO/IEC Guide 99:2007, and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
© ISO 2022 – All rights reserved
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oSIST prEN ISO 3611:2022
ISO/DIS 3611:2022(E)
3.1
micrometer for external measurements

measuring instrument which gives the evaluation of a dimensional quantity of an external feature of a

workpiece on the basis of movement of a spindle with a measuring face, moving relatively to a material

measure and an anvil, with the movement generated by a screw thread

Note 1 to entry: The guiding elements of the spindle and of the anvil are connected by a frame.

Note 2 to entry: Usually, micrometers for external measurements have a thread as a material measure with the

anvil, spindle and material measure arranged in a line.
3.2
measuring face contact
contact between the measuring face and an integral feature of a workpiece
3.2.1
full measuring face contact

contact between the full area of the measuring face and an integral feature of a workpiece

3.2.2
partial measuring face contact

contact between a partial area of the measuring face and an integral feature of a workpiece

4 Design characteristics
4.1 General design and nomenclature

The design of a micrometer for external measurements shall follow the general guidelines in ISO 14978,

including the common design characteristics in ISO 14978:2018, Annex C. See Figure 1 for an example

of the general design.
© ISO 2022 – All rights reserved
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oSIST prEN ISO 3611:2022
ISO/DIS 3611:2022(E)
Key
1 measuring faces 7 sleeve
2 anvil 8 fiducial line
3 measuring spindle 9 analogue indication
4 frame 10 thimble
5 thermally insulating plate 11 fast drive
6 spindle clamp

Figure 1 — Nomenclature and general design of a micrometer for external measurements

4.2 Dimensions

The manufacturer shall state important dimensions, such as those shown in Figure 2 and Table 1. The

values shown in Table 1 are typical dimensions and are not requirements of this document.

Figure 2 — Dimensions of a micrometer for external measurements
© ISO 2022 – All rights reserved
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oSIST prEN ISO 3611:2022
ISO/DIS 3611:2022(E)
Table 1 — Dimensions of a micrometer for external measurements
Dimension Nominal value
Anvil length, L
Spindle length at maximum position, L
Maximum dimension measurable, L
Measuring span, L 25 mm
Frame depth, L
Spindle and anvil diameter, D 6,35 mm, 6,5 mm, 7,5 mm, 8 mm
NOTE The dimensions D , L and L are important for the interchangeability of
1 1 2
accessories mounted on the measuring faces.
At the manufacturer's discretion. Other diameters are possible.
Usually, the frame is shaped to permit the measurement of a cylinder whose
diameter is equal to the last value of the measuring range.
c L
Usually, the measuring span is 25 mm. Other measuring spans are possible.
4.3 Types of indicating devices
4.3.1 General
Several types of indicating devices are possible:
— analogue indicating devices;
— digital indicating devices with mechanical digital display;
— digital indicating devices with electronic digital display.
NOTE Combinations of analogue and digital indicating devices are possible.
4.3.2 Analogue indicating devices

The measuring spindle should have a pitch of 0,5 mm or 1 mm. In the case of micrometers with spindles

having a pitch of 0,5 mm, the 0,5 mm graduation lines on the main scale shall be clearly distinguishable

from the 1 mm graduation lines by means of their arrangement above and below the fiducial line. See

Figures 3 and 4.

The secondary scale on the thimble should have a scale graduated with 50 (pitch 0,5 mm) or 100 (pitch

1 mm) graduation lines, each scale interval representing 0,01 mm. For graduations of 0,001 mm, a

vernier scale can be added on the sleeve. See Figure 4.
4.3.3 Digital indicating devices

The mechanical or electronic digital display should have a digital step of 0,01 mm or 0,001 mm.

4.4 Frame

The rigidity of the frame shall be consistent with the measuring force. For hand-held micrometers, the

frame can be insulated to prevent body heat from being transmitted.
4.5 Measuring force limiting device

Each micrometer for external measurements shall be provided with a measuring force limiting device

integrated in the thimble or in the fast drive.

The measuring force generated by the measuring force limiting device should exceed the frictional

force of the spindle. See 5.7.
© ISO 2022 – All rights reserved
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