Light weight self drilling anchor bolt for coal mine

Specifications

1.deformed steel bar
2.left & right hand
3.dia 16-36mm
4.ended thread
5.use in mine roof support

 

Product Features:

1.With a bit at the anchor head, it is easy to cut through various rocks.

 

2.With the continuous international standard wave-shape thread, this anchor can be used to drill holes with help of bit.

 

3.It is used as grouting channel and unnecessary to be pulled out.

 

4.Grouting pressure can be kept at a high level under the help of grouting stopper, so the cracks are fully filled 

and the fractured rock is improved.

 

5.With the high-strength coupling elongated by mechanical cutting technology, this self-drilling anchor can 

be used at the place with narrow space, achieving the aim of rock reinforcement with extra-long anchor.

 

6.Its unnecessary to take the measure of sleeve protecting and pregrouting to drill the holes in condition of various 

surrounding rocks since this anchor embodies drilling, grouting and anchoring as a whole, and significant 

anchoring and grouting are achieved.

 

Specifications

Specification	Nominal Outside Diameter	Ultimate Tensile Force (KN)	Thread Direction	Pitch (mm)	Standard Length (mm)
Φ25	25	180	Left	12.7	2.5,3,3.5,4,4.5,5m
Φ28	28	220	Left	12.7	2.5,3,3.5,4,4.5,5m
Φ32	32	320	Left	12.7	2.5,3,3.5,4,4.5,5m
Φ38	38	380	Left	12.7	2.5,3,3.5,4,4.5,5m

 

We supply the whole set of the self drilling anchor bolts.

You can contact us directly if you would like to order the anchor with perticular anti extension power and length.

High tension self drilling anchor bolt