ISO 1720-1974 rus PDF

Full title and description

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). This entry corresponds to the 1974 edition; a Russian‑language distribution is commonly catalogued as "Ст ISO 1720‑1974 (rus)".

Abstract

This International Standard specifies requirements for rope‑threaded extension drill‑steel equipment used in percussive long‑hole rock drilling for nominal diameters from 1 1/2 in to 2 in (38 to 51 mm). The 1974 edition provided dimensional, interchangeability and identification guidance for extension drill‑steel assemblies; the standard was later withdrawn and superseded by later ISO publications addressing drill‑steel fittings.

General information

• Status: Withdrawn (withdrawal recorded 1 January 1991).
• Publication date: July 1974 (Edition 1).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 73.100.30 — Drilling and blasting.
• Edition / version: Edition 1 (1974).
• Number of pages: 6 pages.

Scope

Applies to rope‑threaded extension drill‑steel equipment for percussive long‑hole rock drilling with nominal rope‑thread sizes corresponding to 1 1/2 in to 2 in (38 to 51 mm). The standard sets out the intended purpose (compatibility and interchangeability of extension drill‑steel components) for use in mining, quarrying and related drilling operations.

Key topics and requirements

• Definition and designation of rope‑threaded extension drill‑steel components for 38–51 mm sizes.
• Dimensional requirements and tolerances to ensure interchangeability of extension assemblies.
• Basic identification and marking conventions for drill‑steel equipment.
• Reference to compatibility with mating drill‑steel tools used in percussive long‑hole drilling.

Typical use and users

Used historically by manufacturers of drill steel and drilling consumables, procurement and maintenance departments in mining and quarrying companies, drilling contractors, and standards/technical committees working on rock‑drilling equipment. Modern users seeking design guidance should consult the standards that revised or replaced ISO 1720:1974.

Related standards

ISO 1720:1974 was later revised and its subject matter incorporated into later ISO documents — notably ISO 10207:1991 and ISO 10208:1991, which superseded aspects of the 1974 standard. Relevant work is carried out under ISO/TC 82 (rock drilling).

Keywords

rock drilling, drill‑steel, extension drill‑steel, rope thread, percussive long‑hole drilling, interchangeability, ISO 1720, 1974, drill fittings, mining equipment.

FAQ

Q: What is this standard?

A: ISO 1720:1974 is an International Standard that specified requirements for rope‑threaded extension drill‑steel equipment used in percussive long‑hole rock drilling (nominal sizes 1 1/2 to 2 in / 38 to 51 mm).

Q: What does it cover?

A: It covers the designation, dimensional requirements and basic identification for rope‑threaded extension drill‑steel components to ensure interchangeability and compatibility in drilling assemblies for the stated size range.

Q: Who typically uses it?

A: Manufacturers and suppliers of drill‑steel and drilling consumables, drilling contractors and maintenance teams in mining and quarrying, and standards bodies or technical committees concerned with rock‑drilling equipment.

Q: Is it current or superseded?

A: ISO 1720:1974 has been withdrawn (withdrawal recorded 1991) and its subject matter was superseded by later ISO publications such as ISO 10207:1991 and ISO 10208:1991; users should consult those documents for current specifications.

Q: Is it part of a series?

A: It formed part of ISO's rock‑drilling deliverables under ISO/TC 82. Related standards addressing drill‑steel fittings and long‑hole drilling were published later (for example ISO 10207 and ISO 10208).

Q: What are the key keywords?

A: rock drilling; drill‑steel; extension; rope thread; percussive long‑hole; interchangeability; 38–51 mm; ISO 1720:1974.