Sell self-drilling anchor bolt for sale @China (Mainland)

Product introduction:   

Self-drilling anchor bolt is made of seamless steel pipe with thick wall and perfect thread shaping technology, with an alloy bit at the anchor head; it is easy to cut through various rocks.

Structure

     1）  The nut can delivery the surrounding rock stress to arch plate centralized

2) The arch plate can bear more stress of surrounding rock

3）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. 
4）the anchor body With the continuous international standard wave-shape thread, convenient to fit drilling bit, coupling and bolt , also can cut  arbitrary shape and connecting lengthening

5) The coupling can let the anchor body drilling to the design depth when drilling and lengthening at same time.

Application:

It can be widely used in tunnel pre-support, warp and foundation pit support, slope and foundation pit reinforcement, defect and repair of tunnel etc.

Performance parameter

specification	GJ25	GJ28	GJ32
external diameter  （mm）	25	28	32
tensile strength （KN）	≥150-180	≥180-220	≥220-250
hole diameter （mm）	≥15	≥17	≥22
drilling diameter（mm）	42	42	51
rotary direction	left
standard length （m）	3      3.5      4       4.5
length error	±25％

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remarks :

1)The rotary direction can be changed  by construction need
     2）Standard length : can be made by construction site
     3）We can make all kinds of specification and strength anchor bolt by customer’s requirement

4）To match different drilling bit according different stratum

Post by Cindy Cai    General Industrial Equipment    @2012-02-24 08:36:41