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Sinorock hollow injection bolts System
The Sinorock hollow injection bolts System provides a practical rock bolt that is quick and easy to install through fractured or broken ground. The system is available with a range of harder drill bits for efficient drilling in stronger material.
R51anchor bolt is one of the R-thread hollow injection anchor bolt. It is composed by hollow anchor bar, anchor nut, anchor plate, anchor coupling, drill bit, centralizer, and the hollow anchor bars can be cut and lengthened by coupling on request. Which has these features:
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.
And it can be applied in these areas:Tunneling,Soil Nailing,Mining, Slope Stabilization, Hydroelectric Station,Civil Construction.

Changes in the last version:
The Sinorock hollow injection bolts System provides a practical rock bolt that is quick and easy to install through fractured or broken ground. The system is available with a range of harder drill bits for efficient drilling in stronger material. R51anchor bolt is one of the R-thread hollow injection anchor bolt. It is composed by hollow anchor bar, anchor nut, anchor plate, anchor coupling, drill bit, centralizer, and the hollow anchor bars can be cut and lengthened by coupling on request.

Site: http://www.sinorockco.com/product-details-188.html
Source: www.sinorockco.com/product-details-188.html