Active standard | Published: 01/09/1974

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)
(Forage des roches — Matériels pour forage percutant de longs trous — Équipements a filetage a butée inverse 1 1/2 a 2 1/2 in (38 a 64 mm))

Available languages: English, French

Available design: electronic design (pdf), Print design

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Detail information

Designation: ISO 1722:1974

Publication date: 01/09/1974

Pages: 6

Country: International technical standard

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Anotation

Description / 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.

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