1)Drilling, grouting, anchoring accomplish at a time 2)standard:TB/T 3209-2008-hollow bolt technical condition 3)alloy bit

 1.standard

TB/T 3209-2008<hollow bolt technical condition>

2. component

Spherical nut:  surrounding rock stress concentration can be passed to the plate.Vaulted pad:   can accept more of the surrounding rock stress.The plasma plug:  to keep certain pressure grouting surrounding rock fully filling the gap.The body:  the international standard waveforms thread connection, convenient in drill installation, sets coupling, nuts tighten, and any cutting and lengthen connectionLink set:  make bolt drilling and lengthening  to the depth of the design at the same timeBit:  strong penetration, so that the anchor can go through all kinds of rock

model	Nominal diameter(mm)	Nominal thickness(mm)	Yield strength (MPa)	Tensile strength(MPa)	Yield stress(KN)	Max strength(KN)	Elongation rate(%)
φ25×5	25	5	325	490	≥102	≥153	≥21
φ25×7	25	7	325	490	≥128	≥193	≥21
φ28×5.5	28	5.5	325	490	≥126	≥190	≥21
φ32×6	32	6	325	490	≥159	≥240	≥21

self drilling hollow grouting anchor bolt