ISO 1721:1974

Rock drilling — Extension drill-steel equipment for percussive long-hole drilling — Reverse-buttress-threaded equipments 1 1/16 and 1 1/4 in (27 and 32 mm)

Publication date: Aug 1, 1974

General information

Current stage: 90.93 Effective date: Dec 6, 2022

Originator: ISO

Owner: ISO/TC 82

Type: International Standard

ICS: 73.100.30

Languages: French English

Buying

Status: Published

PDF - EC$120.40

Paper - EC$120.40

PDF and Paper - EC$240.80

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Scope

Specifies the basic dimensions for equipment. Gives a list of components; tabulates together with figures: shank adapters for central flushing, hexagon type and lug-shank type; extension rods; coupling sleeves; four-wing bits; reverse-buttress threads; hollow hexagonal bars for extension rods; hexagonal drill-steels.

Life cycle

NOW

PUBLISHED
ISO 1721:1974
90.93 Standard confirmed
Dec 6, 2022

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