Reference number
ISO 722:1991
© ISO 2025
International Standard
ISO 722:1991
Rock drilling equipment — Hollow drill steels in bar form, hexagonal and round
Edition 3
1991-02
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Published (Edition 3, 1991)
This publication was last reviewed and confirmed in 2022. Therefore this version remains current.

ISO 722:1991

Language
Format
CHF 43
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Abstract

Specifies the dimensions for seven nominal sizes. This third edition cancels and replaces the second edition (1985), which has been technically revised (addition of round drill steels and extension of the range of sizes).

General information

  • Status
     : Published
    Publication date
     : 1991-02
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 3
    Number of pages
     : 2
  • Technical Committee :
    ISO/TC 82
  • RSS updates

Life cycle

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