40cr Hollow Anchor Rod R32 Self Drilling Anchor Good Quality Threaded Manufacturer Direct Supply Mining Rock Anchor Bolts Bar

Product IntroductionHollow anchor bar means a rod that transfers the structures or geotechnical load to a stable rock formations, anchor bolt consists of rod, drill bit, coupling, plate, grouting stopper and nut. Widely used as an efficient anchoring means, in tunnel pre-support, slope, coast, mine, water conservancy projects, building foundation, roadbed reinforcement and geological diseases treatment such as landslip, crack, sink age. It's irreplaceable in narrow construction environment. Hollow anchor bar is made of seamless tube with high strength.Advantages and Characteristics :1.No casings required, because anchor bars can be drilled into loose soils without needing casings to support the boreholes.2.Fast drilling and installation, because drilling, installation and grouting are in a single operation.3.Both rope threads and trapezoid threads are robust and ideal for rotary-percussive drilling and ensuring a high level of bond with the borehole gout.4.The hollow core not only serves for flushing during drilling, but also for grouting after drilling.5.Continuous threads ensure the bars can be cut and coupled at any point, or extended.6.Different anchor bits are available for different ground conditions.7.Duplex anti-crossin process, hot-dip galvanized and epoxy coating system. Product SpecificationAnchor Bar 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.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 type.Anchor Nut R25NR32NR32SR38NR51LR51NT76NT76SKey size(mm)414646507575100100Length(mm)13545455570708080Weight(kg/pc)0.250.350.350.51.551.553.63.6Machined steel nut or casting steel nutThe hexagonal and spherical nuts are made from high precision steel (40Cr,HRC 20-25) to meet the stringent demands on anchor specifications and the daily uses of reinforcement work.All nuts exceed the ultimate strength of the rod.T-Thread Anchor Bolt Technial DataBar TypeOutside Diameter(mm)Inside Diameter(mm)Cross section(mm2)Ultimate LoadKNYield PointKNWeight(kg/m)Thread Left/Right Hand30/1130114463202603.3Lift or right30/1430143952602202.9Lift or right30/1630163822201802.7Lift or right40/1640168796605257.0Lift or right40/2040207265394305.6Lift or right52/265226133792973010.0Lift or right73/5373531160163097012.3Lift or right73/5673561094141478511.1Lift or right73/45734522651630118017.8Lift or rightT thread anchor bar surface with a trapezoidal thread, this design of connection is much stro