Sell self-drilling hollow grouted rockbolt gj25 gj28 gj32 @China (Mainland)

self-drilling anchor bolt consists of anchor rod, steel drill bit with alloy head, anchor coupling(optional),arch plate, grouting stopper and hex nut.

Application

1,rock stabilization in tunneling, railway, highway road

2,roof support in underground work

3,slope maintenance

Suitable for good and medium rock surroundings

 It integrates functions drilling, grouting and anchoring as whole and is suitable for difficult grounds (clay, sand, friable…etc). 

Material: seamless steel tube   40Cr

Specifications:

external diameter(mm)      25/28/32

tensile strength(KN)          ≥200/240/280

drilling diameter（mm)       42/42/51

thread type                         left

standard length(m)      1/1.5/2/2.5/3/3.5/4/4.5/5/5.5/6

Post by Cindy Cai    Minerals & Metallurgy    @2012-01-19 09:25:48