International Standard
ISO 1722:1974
Rock drilling — Extension drill-steel equipment for percussive long-hole drilling — Reverse-buttress-threaded equipments 1 1/2 to 2 1/2 in (38 to 64 mm)
Reference number
ISO 1722:1974
ISO 1722:1974
Edition 1
1974-09
1974-09
© ISO 2024
International Standard
p
ISO 1722:1974
6342
Published
(Edition 1, 1974)
This standard was last reviewed and confirmed in 2022.
Therefore this version remains current.
Abstract
Specifies the basic dimensions for equipment. Gives a list of components; tabulates together with figures: size of drill-steel in bar form; lengths of extension rods; coupling sleeves; bit diameters (four-wing bits); reverse-buttress threads; hollow hexagonal bars for extension rods.
Life cycle
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