SIST ISO 9177-2:2024
(Main)Mechanical pencils for technical drawings - Part 2: Black leads - Classification and dimensions
Mechanical pencils for technical drawings - Part 2: Black leads - Classification and dimensions
This document specifies a classification and dimensions for black leads used for mechanical pencils for technical drawings.
Two types of black leads are available:
— polymer leads (designated by the letter “P”);
— ceramic leads (designated by the letter “C”).
Porte-mines pour le dessin technique — Partie 2: Mines graphite — Classification et dimensions
La présente partie de l'ISO 9177 spécifie une classification et les dimensions des mines graphite utilisées dans les porte-mine à dessin. Deux types de mines graphite sont disponibles :
les mines polymère (désignées par la lettre «P»)
les mines céramique (désignées par la lettre «C»)
Tehnični svinčniki za tehnično risanje - 2. del: Grafitni vložki - Razdelitev in mere
Ta dokument določa klasifikacijo in mere za grafitne vložke, ki se uporabljajo v tehničnih svinčnikih za tehnično risanje.
Na voljo sta dve vrsti grafitnega vložka:
– polimerni vložek (označen s črko »P«);
– keramičen vložek (označen s črko »C«).
General Information
- Status
- Published
- Publication Date
- 31-Jan-2024
- Technical Committee
- TRS - Technical drawings, quantities, units, symbols and graphical symbols
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 24-Jan-2024
- Due Date
- 30-Mar-2024
- Completion Date
- 01-Feb-2024
Relations
- Replaces
SIST ISO 9177-2:1995 - Mechanical pencils -- Part 2: Black leads -- Classification and dimensions - Effective Date
- 01-Mar-2024
Overview
SIST ISO 9177-2:2024, issued by the Slovenian Institute for Standardization (SIST), specifies the classification and dimensions for black leads used in mechanical pencils designed for technical drawings. This international standard distinguishes between two primary types of black leads used in technical drawing instruments: polymer leads (designated “P”) and ceramic leads (designated “C”). By providing clear criteria for classification and dimensions, the standard promotes interchangeability and consistency in technical drawing tools, supporting accuracy and quality in drafting and design.
Key Topics
- Types of Black Leads:
- Polymer leads (P): Black leads where the binding agent is an organic polymer.
- Ceramic leads (C): Black leads that use a clay-based binding agent.
- Hardness Degree Classification:
- Leads are classified by hardness from 6B (softest) to 9H (hardest), with HB as the median.
- Nominal Diameters and Lengths:
- Standardized nominal diameters include 0.35, 0.5, 0.7, 1, and 2 mm, ensuring compatibility across instruments.
- Lengths are specified for various mechanical pencil mechanisms for reliable performance and compatibility.
- Designation System:
- A systematic naming convention for easy identification, using information such as standard number, lead type, diameter, and length (e.g., “Black lead ISO 9177-2-P-0,5-60”).
Applications
Mechanical pencils with standardized black leads are essential in a range of technical drawing applications, including:
- Architectural and engineering drafting: Ensures uniform line quality and predictable lead performance.
- Technical product documentation: Facilitates the creation of precise technical drawings and schematics.
- Industrial design and manufacturing: Supports detailed technical renderings and design communication.
- Educational settings: Provides consistency in tools for teaching drafting and technical drawing skills.
- Professional and hobbyist graphic work: Offers a standard baseline for selecting the proper lead for material compatibility and drawing needs.
The clear differentiation between polymer and ceramic leads helps users select the appropriate type for specific drawing requirements, such as line density, erasability, and paper type.
Related Standards
To ensure a comprehensive approach to mechanical pencils and leads for technical drawings, the following related standards are valuable references:
- ISO 9177-1: Mechanical pencils for technical drawings - Part 1: Classification, dimensions, performance requirements, and testing
- ISO 128-2: Technical product documentation (TPD) - General principles of representation - Part 2: Basic conventions for lines
- ISO 20318-1: Mechanical pencils and leads for general use - Part 1: Mechanical pencils
- ISO 20318-2: Mechanical pencils and leads for general use - Part 2: Black leads
These standards work together to provide a unified framework for manufacturers, suppliers, and users, ensuring compatibility, safety, and performance of mechanical pencils and their leads.
SIST ISO 9177-2:2024 is essential for anyone involved in technical drawing, providing clear guidelines that support precision, consistency, and quality in the creation and use of mechanical pencil leads for technical illustrations and documentation. By following this standard, organizations and individuals benefit from internationally recognized best practices in product specification, usage, and interchangeability.
Frequently Asked Questions
SIST ISO 9177-2:2024 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Mechanical pencils for technical drawings - Part 2: Black leads - Classification and dimensions". This standard covers: This document specifies a classification and dimensions for black leads used for mechanical pencils for technical drawings. Two types of black leads are available: — polymer leads (designated by the letter “P”); — ceramic leads (designated by the letter “C”).
This document specifies a classification and dimensions for black leads used for mechanical pencils for technical drawings. Two types of black leads are available: — polymer leads (designated by the letter “P”); — ceramic leads (designated by the letter “C”).
SIST ISO 9177-2:2024 is classified under the following ICS (International Classification for Standards) categories: 01.100.40 - Drawing equipment; 97.180 - Miscellaneous domestic and commercial equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST ISO 9177-2:2024 has the following relationships with other standards: It is inter standard links to SIST ISO 9177-2:1995. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST ISO 9177-2:2024 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2024
Nadomešča:
SIST ISO 9177-2:1995
Tehnični svinčniki za tehnično risanje - 2. del: Grafitni vložki - Razdelitev in mere
Mechanical pencils for technical drawings - Part 2: Black leads - Classification and
dimensions
Porte-mines pour le dessin technique — Partie 2: Mines graphite — Classification et
dimensions
Ta slovenski standard je istoveten z: ISO 9177-2:2022
ICS:
01.100.40 Risalna oprema Drawing equipment
97.180 Razna oprema za dom in Miscellaneous domestic and
trgovino commercial equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 9177-2
Second edition
2022-06
Mechanical pencils for technical
drawings —
Part 2:
Black leads — Classification and
dimensions
Porte-mines pour le dessin technique —
Partie 2: Mines graphite — Classification et dimensions
Reference number
© 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
5 Dimensions .2
5.1 Diameters . 2
5.2 Lengths . 3
6 Designation . 3
Bibliography . 4
iii
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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adhe
...
INTERNATIONAL ISO
STANDARD 9177-2
Second edition
2022-06
Mechanical pencils for technical
drawings —
Part 2:
Black leads — Classification and
dimensions
Porte-mines pour le dessin technique —
Partie 2: Mines graphite — Classification et dimensions
Reference number
© 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
5 Dimensions .2
5.1 Diameters . 2
5.2 Lengths . 3
6 Designation . 3
Bibliography . 4
iii
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 of 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 10, Technical product documentation.
This second edition cancels and replaces the first edition (ISO 9177-2:1989), of which it constitutes a
minor revision. The changes are as follows:
— title revised for consistency with ISO 9177-1, with the addi
...