Sinorock self drilling hollow bar has historically been known as a “self-drilling anchoring” because the hollow fully-threaded bar serves as both the drill string and the grouted anchor, thus installation is performed in a single operation. 

Sinorock carry a comprehensive range of various self drilling hollow bars,generally speaking, we have two categories as below:

1,R25N, R32L, R32N, R32S, R38N,R51N, T76N, T76S, T111N, T111S

2,T30/16,T30/14,T40/16,T40/20,T52/26,T73/53,T73/45,T73/35,T103/78,T103/51

All self drilling hollow anchor bar can be manufactured in different lengths, like 2 meters, 3 meters, 4 meters, 6 meters or 9 meters. Both left hand thread and right hand thread are available upon customers request.

Besides, we also supply a complete range of accessories, including coupling sleeves, steel plates, nuts, centralizers, and various anchor bits.

Today, after these years, by enjoying a considerable expertise in hollow bar industry, we are honored with our history of importing andintroducing some kinds of self drilling hollow bars in various ranges of capacities to the demanding construction market in our country,together with consulting projects for the purpose of addressing the best location and the optimum choice of capacity, plus extensive sales and after-sales services, providing timely spare parts support, all in accordance with engineering standards worldwide.