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Yanggu Yihui Drilling Tools Co.,Ltd.

ADDRESS:No.216 Zhengyang Road, Qingdao, Shandong,China.



The Feature Of The Self Drilling Anchor Bar
Mar 01, 2019

The main feature of the Self-Drilling Anchor (SDA) system is the application of a single-use drill bit in combination with the rock bolt being used as a drill steel. Thus, the rock bolt is connected to the hydraulic rock drill by an adapter device and installed in the way a conventional borehole is drilled.  SDA program consists of the following:

  • Single-use drill bits, which are available either hardened or with carbide inserts

  • Hollow, steel bars, with a continuous outside thread

  • Steel couplings, with a continuous inside thread

  • Steel nuts

  • Steel face plates

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