GB/T 20704-2006
Rock drilling-Rotary drill-rods and rotary drill-bits for dry drilling-Connecting dimensions (English Version)

Standard No.

GB/T 20704-2006

Language

Chinese, Available in English version

Release Date

2006

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 20704-2006

Scope

This standard specifies the connection dimensions of dry drill pipe and drill bit shank for rock drilling, and also gives an example for wet drilling drill pipe and drill bit. This standard does not specify the dimensions of the drill pipe and bit itself.

GB/T 20704-2006 history

• 2006 GB/T 20704-2006 Rock drilling-Rotary drill-rods and rotary drill-bits for dry drilling-Connecting dimensions