International Standard
ISO 1721:1974
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)
Reference number
ISO 1721:1974
Edition 1
1974-08
International Standard
Read sample
ISO 1721:1974
6341
Published (Edition 1, 1974)
This standard was last reviewed and confirmed in 2022. Therefore this version remains current.

ISO 1721:1974

ISO 1721:1974
6341
Language
Format
CHF 42
Convert Swiss francs (CHF) to your currency

Abstract

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

  •  : Published
     : 1974-08
    : International Standard confirmed [90.93]
  •  : 1
     : 6
  • ISO/TC 82
    73.100.30 
  • RSS updates

Life cycle

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