Self-Drilling Rock Bolt

Self-Drilling Rock Bolt

Drilling, grouting, anchoring, in one!

GEOTEC Steel Self-Drilling Rock Bolt is a rock-bolting system based on a fully coarse threaded hollow bar.

It is especially recommended for the following applications :

  • Roof and wall bolting.
  • All ground conditions. GEOTEC Self Drilling Rock Bolts do not require to pre-drill a hole, therefore making it usable even in soft rock conditions.
  • Installation with grout. The hollow steel anchor rod also acts as a grouting pipe to ease set up. For non-grouting applications, please refer to Mechanical Anchor or Expandable Friction bolt.
  • Temporary or permanent applications. With optional epoxy coating available for permanent applications.

Product features

  • 3 in 1 concept: acts as a drilling rod, as well as an anchor bar and a grouting pipe.
  • Splicing system available to achieve longer tendon length.
  • Available in diameters fromo 25 to 76 for Ultimate Load performances up to 1,600 kN.
  • 2 types of threads profile available: R (Rope Thread) or T (trapezoidal).
  • For permanent applications, optional epoxy coating can be provided to protect from corrosion.
  • No cased borehole allowing ground preservation
  • Designed as per BS EN 1997-1; BS EN 1537 and BS 7861-1.


Drilling Hollow rod
Acts as a drilling rod and a grouting pipe to simplify installation process.
Sacrificial Drilling Bits
Available for every ground conditions.
Threaded profiles
Alternative thread profiles and directions available.


At every moment of your customer journey, Dextra teams dedicate themselves to the making of smart construction solutions that allow our customers to reach higher productivity and safety level on their construction sites.

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Network & Services

Network - Dextra holds physical stocks on several continents, complemented in each country by the local inventories of our distributors. With this extended network, Dextra make sure our products are always at reach and available in reasonable times.

Delivery - For solutions which required to be customized for each project, Dextra can also go beyond our standard delivery times and offer accelerated delivery schemes. Consult us for more information.

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Manufacturing capabilities

From 3 major industrial sites located in Bangkok (Thailand), Guangzhou (China) and Mumbai (India), Dextra completely owns its manufacturing facilities and processes. This allows us to have complete control over the timing of our operations and the quality of the solutions produced.

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Testing facility

An independently accredited material testing laboratory, accredited to ISO-IEC 17025, is located at Dextra’s main Bangkok factory, allowing the testing of material and products.

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Quality & Certifications

Dextra aims to supply products that exceed the most demanding international technical approvals and it is our goal to create maximum customer satisfaction by complying with our clients’ needs and specified requirements.

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