SIST ISO 722:1997

Rock drilling equipment -- Hollow drill steels in bar form, hexagonal and round

Specifies the dimensions for seven nominal sizes. This third edition cancels and replaces the second edition (1985), which has been technically revised (addition of round drill steels and extension of the range of sizes).

Matériel de forage des roches -- Barres creuses, hexagonales et rondes pour fleurets

Oprema za vrtanje kamnin - Votlo vrtalno drogovje v obliki šesterokotnih in okroglih palic

General Information

• Status: Published
• Publication Date: 31-Jul-1997
• ICS: 73.100.30 - Equipment for drilling and mine excavation
• Technical Committee: IRUD - Mining
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Aug-1997
• Due Date: 01-Aug-1997
• Completion Date: 01-Aug-1997
• Ref Project: ISO 722:1991 - Rock drilling equipment - Hollow drill steels in bar form, hexagonal and round

Relations

• Revised: ISO 722:1985 - Rock drilling - Hollow hexagonal drill-steels in bar form
• Effective Date: 12-May-2008

Overview

SIST ISO 722:1997 is an international standard developed by the International Organization for Standardization (ISO) that specifies the dimensions for hollow drill steels used in rock drilling equipment. This standard covers hollow drill steels in bar form, both hexagonal and round shapes, used primarily for mining and construction applications. The third edition of ISO 722 updates and replaces the 1985 edition by expanding the range of sizes and including hollow round drill steels for the first time.

This standard ensures uniformity and interchangeability in the manufacturing and usage of drill steels for rock drilling equipment, contributing to improved safety, efficiency, and compatibility in mining operations worldwide.

Key Topics

• Scope and Application
  SIST ISO 722:1997 defines the precise dimensions for seven nominal sizes of hollow drill steels made from steel. The steels are supplied in hexagonal and round cross-sections specifically designed for rock drilling fleurets.

• Dimensions and Tolerances
  The standard provides detailed dimensional requirements, including:

  • Outer diameter
  • Inner diameter (hollow section)
  • Bar length
  • Tolerances for manufacturing accuracy
    These dimensions are critical for ensuring proper fit and function when assembling rock drilling equipment.

• Types of Drill Steels Covered

  • Hexagonal hollow drill steels - widely used due to their superior torque transmission and resistance to twisting.
  • Round hollow drill steels - introduced in this edition to extend equipment design options and applications.

• Technical Revisions
  The 1991 edition includes technical updates from the previous edition, such as the addition of hollow round bars and the extension of the size range, making the standard more comprehensive.

Applications

• Mining Industry
  SIST ISO 722:1997 is essential for manufacturers of drilling equipment used in mining operations. Standardized hollow drill steels facilitate the design and production of reliable rock drilling systems for extracting minerals and ores efficiently.

• Construction and Civil Engineering
  Drilling for foundations, tunnels, and other underground infrastructure requires robust drilling equipment compliant with international standards like ISO 722.

• Geotechnical Investigations
  Equipment using drill steels compliant with ISO 722 is employed for soil sampling and rock testing, supporting accurate site assessments.

• Equipment Manufacturing
  Drill steel manufacturers rely on ISO 722 to ensure product specifications meet customer and operational requirements globally, promoting equipment compatibility and safety.

Related Standards

• ISO 2241 - Covers the general specifications for rock drilling equipment and accessories, complementing ISO 722 by defining broader assembly and performance elements.

• ISO 7005 series - Addresses steel tubes and bars used in industrial applications, some of which may overlap with material properties of drill steels.

• ISO/TC 82 - A technical committee focusing on mining and related equipment standards, responsible for the development and maintenance of ISO 722.

Benefits of Adopting SIST ISO 722:1997

• Ensures consistency in drill steel dimensions across manufacturers
• Enhances compatibility and interchangeability of parts in rock drilling rigs
• Improves operational safety by standardizing mechanical properties and dimensions
• Supports international trade by harmonizing product specifications
• Enables better equipment design with a clear set of dimensional guidelines

For organizations involved in rock drilling operations or in the manufacture of drilling equipment, adherence to SIST ISO 722:1997 ensures a high-quality standard that meets global expectations, thus optimizing performance and reducing maintenance issues associated with non-standard parts.

---

Keywords: ISO 722, rock drilling equipment, hollow drill steels, hexagonal drill steels, round drill steels, drilling bar dimensions, mining equipment standards, drill steel tolerances, standard rock drilling tools, ISO mining standards

Standards Content (Sample)

SLOVENSKI STANDARD
01-avgust-1997
Oprema za vrtanje kamnin - Votlo vrtalno drogovje v obliki šesterokotnih in
okroglih palic
Rock drilling equipment -- Hollow drill steels in bar form, hexagonal and round
Matériel de forage des roches -- Barres creuses, hexagonales et rondes pour fleurets
Ta slovenski standard je istoveten z: ISO 722:1991
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.

ISO
INTERNATIONAL
STANDARD
Third edi tion
1991-02-15
Rock drilling equipment - Hollow drill steels in
bar form, hexagonal and round
Barres Cremes, hexagonales et rondes
Mat&iel de forage des roches -
pour f7eurets
Reference number
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. Esch 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. ISO 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 Inter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard ISO 722 was prepared by Technical Committee
...

ISO
INTERNATIONAL
STANDARD
Third edi tion
1991-02-15
Rock drilling equipment - Hollow drill steels in
bar form, hexagonal and round
Barres Cremes, hexagonales et rondes
Mat&iel de forage des roches -
pour f7eurets
Reference number
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. Esch 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. ISO 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 Inter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard ISO 722 was prepared by Technical Committee
ISO/TC 82, Mining.
This third edition cancels and replaces the second edition (ISO 722:
1985), which has been technically revised (addition of round drill steels
and extension of the range of sizes).
0 ISO 1991
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronie or mechanical, inclu
...

ISO
NORME
INTERNATIONALE 722
Troisième édition
199 1-02-l 5
Matériel de forage des roches - Barres
creuses, hexagonales et rondes pour fleurets
- Hollow drill steels in bar for-m, hexagonal and
Rock drilling equipment
round
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-
resse 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 722 a été élaborée par le comité technique
lSO/TC 82, Exploitation minière.
Cette troisième édition annule et remplace la deuxième édition
(ISO 722: 1985), dont la gamme des dimensions a été étendue et à la-
quelle les barres creuses rondes ont été ajoutées.
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’a
...

ISO
NORME
INTERNATIONALE 722
Troisième édition
199 1-02-l 5
Matériel de forage des roches - Barres
creuses, hexagonales et rondes pour fleurets
- Hollow drill steels in bar for-m, hexagonal and
Rock drilling equipment
round
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-
resse 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 722 a été élaborée par le comité technique
lSO/TC 82, Exploitation minière.
Cette troisième édition annule et remplace la deuxième édition
(ISO 722: 1985), dont la gamme des dimensions a été étendue et à la-
quelle les barres creuses rondes ont été ajoutées.
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’a
...