Self Drilling Hollow anchor bars

The Self Drilling Anchor system is comprised of a hollow threaded anchor bar with a sacrificial drill bit that performs drilling, anchoring and grouting in a single operation. Self drilling anchor system is mainly used in slope stabilization, tunneling support, foundations with micro piles etc jobs, which is widely used in mining, tunneling, railway, metro construction etc projects.

It includes T thread and R thread:

R thread anchor bar also called rock bolt, soil nail, is threaded hollow bar that surface with an rope thread. It solves the low construction speed on complicated underground works, nowadays; it is very popular all around the world. T thread anchor bar surface with a trapezoidal thread, this design is much stronger and reliable compared with R thread.

R thread: R25, R32, R38, R51, T76

T thread: T30, T40, T52, T73, T103, T127, T130

Thread connection: ISO10208, ISO1720 international standard