GY self drilling anchors have offered an ideal solution for bolting in rock formations, and made a good performance when they worked as rock nails to serve to stabilize fractured and fissured rock.
A GY self drilling rock nail syetem consists of anchor nut, anchor plate, anchor coupler, hollow anchor bar, sacrificial drill bit.

Feature
1.high tensile load-bearing capacity
2.simultaneous drilling and grouting
3.corrossion protected
4.hot rolled
5.fully thread

Main applications

* Road / rail construction and maintenance

* Tunneling & Mining

* Rural environments

* Private residences

* Special foundations

* Avalanche protection structures

System description

1, hollow core with continuous hot-rolled outside thread

2, application as injection anchor without casing, especially for non-stable boreholes

3, self-drilling installation, utilization of the anchor bar as drill rod with a single-use drill bit

4, easy extension of the anchor bars by anchor coupler

5, grouting or development of the grout body either simultaneously with drilling using a rotary injection adapter or afterwards

6, assembly of the anchor head with the anchor plate and the nut, stressing and locking

Specification

Type	Outer diameter	Inner diameter	Ultimate load	Yield load	Weight
	mm	mm	KN	KN	Kgs/m
R25N	25	13	200	150	2.4
R32L	32	20	220	160	2.9
R32N	32	18.5	280	230	3.2
R32S	32	15	360	280	4.0
R38N	38	19	500	400	5.8
R51L	51	36	550	450	6.8
R51N	51	33	800	630	7.8

1) left hand thread unless otherwise noted

2) high quality Tungsten carbide cross-cut drill bit recommended