Sinorock tunneling self drilling hollow bar

Self drilling anchor bolt is composed by hollow anchor bolt, anchor nut, anchor plate, anchor coupler, drill bit, centralizer, and the hollow anchor bars can be cut and lengthened by coupling on request. 

Functions:

Self drilling anchor system is an advanced system which can ensure the anchoring effect for complex ground conditions. It can be integrated with the functions of drilling, grouting and anchoring.

Conditions:

Tunneling

Mining

Slope Stabilization

Foundation Support

Features and advantages:

1. Safe, reliable, and time saving. 

2. Simple installation & operation.

3. Choice of drill bits for different ground conditions.

4. Grouting works synchronize with drilling or after drilling. Grout can fill fractures effectively. 

5. Anchor bars can be cut and lengthened on request, applying to narrow spaces.

6. It provides higher bonding stress than smooth steel pipe depending on continuous wave thread.