ISO 1722:1974

Current Revision
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)

Best Price Guarantee Sep 15, 1974 English 1 Pages

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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)

PUBLISH DATE 1974
ISO 1722:1974

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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