ISO 1721:1974 Preview

Rock drilling -- Extension drill-steel equipment for percussive long-hole drilling -- Reverse-buttress-threaded equipments 1 1/16 and 1 1/4 in (27 and 32 mm)

Specifies the basic dimensions for equipment. Gives a list of components; tabulates together with figures: shank adapters for central flushing, hexagon type and lug-shank type; extension rods; coupling sleeves; four-wing bits; reverse-buttress threads; hollow hexagonal bars for extension rods; hexagonal drill-steels.


General information

  • Status :  Published
    Publication date : 1974-08
  • Edition : 1
    Number of pages : 6
  • :
    ISO/TC 82
    Mining
  • 73.100.30
    Equipment for drilling and mine excavation

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