ISO 723:1991

Overview

ISO 723:1991 is an international standard published by the International Organization for Standardization (ISO) that specifies the dimensional requirements for forged collared shanks and corresponding chuck bushings designed for use with hollow hexagonal drill steels in rock drilling equipment. This standard is a key specification for manufacturers and users in the mining and construction industries who rely on reliable and compatible drilling components.

The second edition (1991) reflects a technical revision from the first edition, expanding the range of nominal sizes and including precise specifications for the internal diameter at the forged collar. The dimensions detailed in ISO 723:1991 promote equipment interoperability, secure fitting, and safety during drilling operations.

Key Topics

• Dimensional Specifications: Defines the required dimensions of forged collared shanks and chuck bushings to ensure consistency and compatibility.
• Nominal Sizes: Covers five standardized nominal sizes, enabling flexibility and broad application.
• Interchangeability: Facilitates the interchangeability of drilling equipment components from different manufacturers, supporting industry-wide compatibility.
• Referencing ISO 722: Equipment must comply with ISO 722 for hexagonal drill steel bars, ensuring alignment with established standards for hollow drill steels.
• Range of Applications: Addresses the needs of various rock drilling operations where hollow hexagonal drill steels are employed.

Applications

ISO 723:1991 is essential in several practical scenarios within the mining and construction sectors, as well as in any field where rock drilling is necessary. Typical applications include:

• Mining Operations: Ensures the compatibility and safety of drilling equipment used in mining for mineral exploration and extraction.
• Civil Construction Projects: Supports tunnel construction, foundation work, and other projects involving extensive rock drilling.
• Equipment Manufacturing: Provides precise guidelines for manufacturers of rock drilling equipment and spare parts to achieve global market compatibility.
• Maintenance and Repair: Allows operators and maintenance teams to source compatible forged collared shanks and bushings quickly, reducing downtime with standardized parts.
• Equipment Upgrades: Facilitates the replacement or upgrade of worn or outdated rock drilling components with confidence in the fit and performance.

Related Standards

When working with hollow hexagonal drill steels and related equipment, the following standards should be taken into consideration:

• ISO 722:1991: Rock drilling equipment – Hollow drill steels in bar form, hexagonal and round
  Establishes the profile and dimensional requirements for the drill steels that interface with the forged collared shanks and bushings specified in ISO 723:1991.

• ISO/TC 82: Mining
  The technical committee responsible for the development of international standards in mining, including equipment and safety standards.

These related standards complement ISO 723:1991 and collectively support compatibility, safety, and performance in rock drilling equipment worldwide.

By adhering to ISO 723:1991, organizations ensure that their rock drilling equipment, including forged collared shanks and chuck bushings for hollow hexagonal drill steels, meets internationally recognized dimensions for quality, safety, and global interoperability. This standard is an indispensable reference for equipment manufacturers, procurement specialists, and engineering professionals in the mining and construction industries.