ISO 10208:1991

Rock drilling equipment - Left-hand rope threads

Defines dimensions and tolerances of left-hand rope threads to be used on rope threaded drill steel equipment for percussive drilling. Five sets of values are given.

Matériel de forage des roches — Filetage corde à gauche

Oprema za vrtanje kamnin - Levi obli navoj

General Information

• Status: Published
• Publication Date: 23-Jan-1991
• ICS: 73.100.30 - Equipment for drilling and mine excavation
• Technical Committee: ISO/TC 82 - Mining
• Drafting Committee: ISO/TC 82 - Mining
• Current Stage: 9093 - International Standard confirmed
• Start Date: 06-Dec-2022
• Completion Date: 13-Dec-2025
• Ref Project: SIST ISO 10208:1996 - Rock drilling equipment -- Left-hand rope threads

Relations

• Revises: ISO 1719:1974 - Rock drilling - Extension drill-steel equipment for percussive long-hole drilling - Rope-threaded equipments 7/8 to 1 1/4 in (22 to 32 mm)
• Effective Date: 15-Apr-2008
• Revises: ISO 1720:1974 - Rock drilling - Extension drill-steel equipment for percussive long-hole drilling - Rope-threaded equipments 1 1/2 to 2 in (38 to 51 mm)
• Effective Date: 15-Apr-2008

Overview

ISO 10208:1991 is an international standard published by the International Organization for Standardization (ISO) that specifies the dimensions and tolerances of left-hand rope threads used in rock drilling equipment. Specifically, this standard applies to rope threaded drill steel equipment utilized in percussive drilling operations. The standard ensures compatibility, safety, and interchangeability of drilling components through clearly defined thread geometry.

Developed by ISO Technical Committee 82 (Mining), ISO 10208:1991 consolidates and updates previous standards (ISO 1719:1974 and ISO 1720:1974), representing a key technical revision to improve drilling efficiency and equipment reliability. It ultimately supports the mining and construction industries by defining uniform manufacturing parameters for left-hand rope threads in rock drilling tools.

Key Topics

• Left-hand rope threads: The standard focuses on left-hand threads-threads that tighten counterclockwise-commonly used in rock drilling equipment.
• Dimensional specifications: Provides detailed measurements including nominal thread diameters, pitches (fixed at 12.7 mm), and tolerances for internal and external threads to ensure proper fit and performance.
• Five sets of thread values: Covers a range of nominal diameters from 22 mm to 38 mm with corresponding pitch diameters and radial dimensions.
• Joint-tangent details: Offers supplementary geometric descriptions for the joint tangent of threads, crucial for strength and assembly accuracy.
• Percussive drilling application: Tailors thread standards explicitly for equipment used in high-impact, percussive rock drilling operations.

Applications

ISO 10208:1991 is critical for manufacturers and operators involved in:

• Rock drilling equipment production: Ensuring that drill steel and related components meet precise thread specifications for optimal assembly and durability.
• Mining operations: Supporting standardized equipment maintenance and replacement parts compatible across different machinery and suppliers.
• Construction and civil engineering: Enhancing reliability in foundation drilling, tunneling, and rock excavation tools.
• Equipment interoperability: Facilitating global trade and performance consistency of drill steels and accessories with standardized left-hand rope threads.

By adhering to ISO 10208:1991, companies can reduce equipment failures, improve safety standards, and ensure seamless component fit across multiple drilling platforms.

Related Standards

Professionals and organizations typically consider ISO 10208:1991 alongside the following standards:

• ISO 10207:1991 – Rock drilling equipment - Right-hand rope threads: Complements ISO 10208 by defining right-hand rope thread dimensions, covering the opposite thread direction for drill equipment.
• ISO 1719:1974 and ISO 1720:1974 – Earlier standards replaced by ISO 10208 and ISO 10207, relating to threaded components in mining tools.
• ISO/TC 82 Mining Standards – Series of ISO standards governing mining and drilling machinery specifications.

Together, these standards ensure comprehensive and harmonized threaded drilling equipment designs to meet industry demands efficiently.

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Keywords: ISO 10208, left-hand rope threads, rock drilling equipment, percussive drilling, thread dimensions, mining equipment standard, drill steel threads, rope thread tolerances, drilling tool compatibility, drilling equipment standards

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-1996
Oprema za vrtanje kamnin - Levi obli navoj
Rock drilling equipment -- Left-hand rope threads
Matériel de forage des roches -- Filetage corde à gauche
Ta slovenski standard je istoveten z: ISO 10208:1991
ICS:
73.100.30 Oprema za vrtanje in Equipment for drilling and
izkopavanje mine excavation
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

IS0
INTERNATIONAL
STANDARD 10208
First edition
1991-02-15
Rock drilling equipment - Left-hand rope
threads
Mat&Ye1 de forage des roches - Filetage code 5 gauche
Reference number
IS0 10208:1991(E)
IS0 10208:1991(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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, govern-
mental and non-governmental, in liaison with ISO, also take part in the
work. IS0 collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an lnter-
national Standard requires approval by at least 75 % of the member
bodi
...

IS0
INTERNATIONAL
STANDARD 10208
First edition
1991-02-15
Rock drilling equipment - Left-hand rope
threads
Mat&Ye1 de forage des roches - Filetage code 5 gauche
Reference number
IS0 10208:1991(E)
IS0 10208:1991(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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, govern-
mental and non-governmental, in liaison with ISO, also take part in the
work. IS0 collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an lnter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard IS0 10208 was prepared by Technical Committee
ISO/TC 82, Mining.
This present International Standard, together with IS0 10207:1991, can-
cels and replaces IS0 1719:1974 and IS0 1720:1974, of which it consti-
tutes a technical revision.
0 IS0 1991
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without
permission in writing from the publisher.
International Orga nization for Standard ization
Case Postale
...

IS0
NORME
I N T E R N AT I O NA LE 10208
Première édition
1991 -02-1 5
Matériel de forage des roches - Filetage corde
à gauche
Rock drilling equipment - Left-hand rope threads
________
Numéro de référence
IS0 10208: 1991 (F)
IS0 10208:1991(F)
Avant- propos
L’ISO (Organisation internationale de normalisation) est une fédération
mondiale d’organismes nationaux de normalisation (comités membres
de I’ISO). L‘élaboration des Normes internationales est en général
confiée aux comités techniques de I’ISO. Chaque comité membre inté-
ressé par une étude a le droit de faire partie du comité technique créé
à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I‘ISO participent également aux tra-
vaux, L’ISO collabore étroitement avec la Commission électrotechnique
internationale (CEI) en ce qui concerne la normalisation électrotech-
nique.
Les projets de Normes internationales adoptés par les comités techni-
ques sont soumis aux comités membres pour vote. Leur publication
comme Normes internationales requiert l’approbation de 75 au moins
des comités membres votants.
La Norme internationale IS0 10208 a été élaborée par le comité techni-
que ISO/TC 82, Exploitation minière.
La présente Norme internationale, conjointement avec I’ISO 10207:1991,
annule et remplace l’lS0 1719:1974 et I’ISO 1720.1974, dont elle consti-
tue une révision technique.
8 IS0 1991
Droits de reproduction reserves. Aucune partie de cette publication ne peut dtre repro-
duite ni utilisée sous quelque forme que ce soit et par aucun p
...

NORME
INTERNATIONALE 10208
Première édition
199 1-02-l 5
Matériel de forage des roches - Filetage corde
à gauche
Rock drilling equipmen t - Left-hand rope threads
Numéro de référence
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération
mondiale d’organismes nationaux de normalisation (comités membres
de I’ISO). L’élaboration des Normes internationales est en général
confiée aux comités techniques de I’ISO. Chaque comité membre inté-
ressé par une étude a le droit de faire partie du comité technique créé
à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I’ISO participent également aux tra-
vaux. L’ISO collabore étroitement avec la Commission électrotechnique
internationale (CEI) en ce qui concerne la normalisation électrotech-
nique.
Les projets de Normes internationales adoptés par les comités techni-
ques sont soumis aux comités membres pour vote. Leur publication
comme Normes internationales requiert l’approbation de 75 % au moins
des comités membres votants.
La Norme internationale ISO 10208 a été élaborée par le comité techni-
que ISO/TC 82, Exploitation minière.
La présente Norme internationale, conjointement avec I’ISO 10207:1991,
annule et remplace I’ISO 17193974 et VIS0 1720:1974, dont elle consti-
tue une révision technique.
0 ISO 1991
Droits de reproduction réservés. Aucune partie de cette publication ne peut être repro-
duite ni utilisée sous quelque forme que ce Soit et par aucun procédé, électronique ou
mécanique, y compris la photocopie et les microfilms, sans l’accord écrit de l’éditeur.
Organisatio
...