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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)

This standard has been reviewed and then confirmed in 2013 
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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.


  • Edition: 1 (Monolingual) ICS: 73.100.30
    Status: Published Stage: 90.93 (2013-07-08)
    TC/SC: ISO/TC 82 Number of Pages: 6
  • No revision information available

  • No corrigenda or amendments available

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