China Top Quality Full Threaded Steel Self Drilling Anchor Bolt / Hollow Anchor Bar / Anchor Rods High Strength Self Drilling Hollow Grouting Rock Bolt

  Product IntroductionSelf drilling anchor system is mainly used in slope stabilization, tunneling pre-support, foundations with micropiles, it is also widely used in the railway system, metro project etc. It can be installed in sites with weak rocks, loose soil, weathered layer, sand with stone layer and so difficult to create a hole in complex formations. The unconsolidated ground condition favor the self-drilling anchor bolt technique for fast and simple method of installation compared to the traditional method.1.Self drilling anchor system has two performances: the one is drilling, the other one is grouting. It features a hollow bore for flushing, or simultaneous drilling and grouting.2.Self drilling anchor system is reliable, efficient and convenient, which makes high piling output possible.3.We can also make the Hot-Dip Galvanizing Corrosion Protection according to EN ISO1461Features of Hollow Grouting Anchor Bar:• Fits standard Boomer, ROC and Mustang rigs.• Particularly suitable for difficult ground conditions.• A high rate of installation since drilling, placing and grouting can be performed in one single operation.• Self drilling system eliminates the requirement for a cased borehole.• Installation with simultaneous drilling and grouting possible.• Easy installation in all directions, also upwards.• Suitable for working in limited space, height and in areas of difficult access.• Simple post grouting system.• Hot-dipped galvanizing for corrosion protectionProduct SpecificationAnchor BarR-Thread Anchor Rod Technial Data R25NR32NR32SR38NR51LR51NT76NT76SOutside diameter(mm)2532323851517676Internal diameter(mm)1419161936335245Ultimate loadcapacity(KN)20028036050055080016001900Yield loadcapacity(KN)15023028040045063012001500Tensile strength,Rp0.2(N/mm2)800800800800800800800800Yield strength,Rp0.2(N/mm2)650650650650650650650650Weight (Kg/m)2.33.23.65.56.58.016.019.7Thread type(left-hand)ISO 10208ISO 1720MAI T76 StandardSteel gradeEn10083-1 (Alloy structure steel)Compared to carbon steel, alloy structure steel has high anti-corrosion capacity and high mechanical.R thread anchor bar or called rock rod, soil nail, which is a kind of threaded hollow bar, bar surface with an rope thread according to ISO 10208 & 1720. It was firstly invented by MAI on 1960S to solve the low construction speed on complicated underground works, nowadays; it is very popular all around the world.Thread size: R25, R32, R38, R51, T76.Thread standard: ISO10208, ISO1720 etc.T-Thread Anchor Rod Technial DataBar TypeOutside Diameter(mm)Inside Diameter(mm)Cross section(mm2)Ultimate LoadKNYield PointKNWeight(kg/m)Thread Left/Right HandT30/1130114463202603.3Lift or rightT30/1430143952602202.9Lift or rightT30/1630163822201802.7Lift or rightT40/1640168796605257.0Lift or rightT40/2040207265394305.6Lift or rightT52/265226133792973010.0Lift or rightT73/5373531160163097012.3Lift or rightT73/5673561094141478511.1Lift or rightT73/45734522651630118017.8Lift or rightT thread anchor bar surface with a trapezoidal thread, this design of connection is much stronger and reliable when compared with rope thread, we supply full sizes from T30 to T103.Thread size: T30, T40, T52, T73, T103, T127, T130.Thread standard: ISO10208, ISO1720 etc.Anchor Plate R25NR32NR32SR38NR51LR51NT76NT76SDimention (mm)150*150200*200200*200200*200200*200250*250250*250250*250Thickness (mm)810121220404040Hole diameter (mm)3035354160608080Weight (KG/PC)1.433.73.68.818.51818Cold deformed with geometryAnchor Coupling R25NR32NR32SR38NR51LR51NT76NT76SOutside diameter (mm)3542425263639595Length (mm)120145160or190180180200200200Weight0.450.70.751.41.71.96.46.4Machined steel coupling middle stopThe hollow bar is continuously threaded, it can be cut and coupled anwhere along its length.The coupling enables direct end-to-end energy transmission between each bar, reducing losses and ensuring maximum percussive engergy at the drill bit.Drill Bit R25NR32NR32SR38NR51LR51NT76NT76SDiameter (mm)41,5151,76,9090,100,110,115,130130,150,160,180,200Hardened cross bit(EX)Hardened cross bit for loose to medium dense condition with small boulders.Tungsten cross bit(EXX)TC cross bit for soft to medium rock for mationsHardened button bit(ES)Hardened buuton bit for unconsolidated rock with boulders.Tungsten carbon button bit(ESS)Button bit with TC inserts for medium rock for formations.Hardened arch bit(EC)Hardened drill bit with optimized geometry for uncon solid dated soilwith small boulders.Tungsten carbon arch bit(ECC)TC drill bit with optimized geometry for soft to medium rock formations.Hardened drop center bit(EY)Hardened cross bit for loose to medium dense ground conditionsTC drop center bit(EY)TC drill bit for soft to medium rock formations.Casting clay bit(EW)Casting clay bit with optimized geometry for very soft to soft caly.Machined steel bit or Casring steel bitThe sacrificial drill bit is an important part of the self drilling anchoring system.Choose suitable bits according to different soil ty