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)
This standard was last reviewed and confirmed* in 2013.
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.
Document published on: 1974-09 Edition: 1 (Monolingual) ICS: 73.100.30 Status: Published Stage: 90.20 (2017-01-15) TC/SC: ISO/TC 82 Number of Pages: 6
This standard has not been revised
No corrigenda or amendments available