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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)

Aug 1, 1974

General information

90.93     Dec 6, 2022

ISO

ISO/TC 82

International Standard

73.100.30  

French   English  

Buying

Published

Language in which you want to receive the document.

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

National adoptions

SSH ISO 1721:2009  
DPS

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)

60.60 Standard published

DPS/KT 133 more