Self-drilling anchor system are innovative and efficient construction components that combine drilling, grouting, and anchoring functions into a single integrated system. These rock anchor bolts are designed to simplify the installation process, reduce construction time, and enhance the stability of structures in various geological conditions. A self-drilling anchor bolt typically consists of several essential components, each playing a critical role in its performance:

Threaded Hollow Anchor Bar

The threaded hollow anchor bar forms the core structural element of the whole self-drilling anchor system. It provides the necessary load-bearing capacity and is designed to resist tension forces. The thread pattern on the rod allows for easy attachment of drill bits, nuts, plates, and other components. Self-drilling anchor bolts can be categorized based on their threading patterns. Two common types includeR-Thread Self-Drilling Anchor Bolts and T-Thread Self-Drilling Anchor Bolts.

R-Thread Anchor Bolt Technial Data

R thread anchor bar or called rock rod, soil nail, which is a kind of threaded hollow bar, bar surface with an rope thread according to ISO 10208 & 1720. It was firstly invented by MAI on 1960S to solve the low construction speed on complicated underground works, nowadays; it is very popular all around the world.
Thread size: R25, R32, R38, R51, T76.
Thread standard: ISO10208, ISO1720 etc.

T-Thread Anchor Bolt Technial Data

T thread anchor bar surface with a trapezoidal thread, this design of connection is much stronger and reliable when compared with rope thread, we supply full sizes from T30 to T103.
Thread size: T30, T40, T52, T73, T103, T127, T130.
Thread standard: ISO10208, ISO1720 etc.

Anchor Plate

Anchor Coupling

The hollow bar is continuously threaded, it can be cut and coupled anwhere along its length.
The coupling enables direct end-to-end energy transmission between each bar, reducing losses and ensuring maximum percussive engergy at the drill bit.

Drill Bit

The sacrificial drill bit is an important part of the self drilling anchoring system.
Choose suitable bits according to different soil type.

Anchor Nut

The hexagonal and spherical nuts are made from high precision steel (40Cr,HRC 20-25) to meet the stringent demands on anchor specifications and the daily uses of reinforcement work.
All nuts exceed the ultimate strength of the rod.