coupling sleeve

We are a professional manufacture of rock drilling tools, mining tools, DTH Drilling tools. construction tools and excavating coal pick cutter tools. 1.Integral drill steels(Integral Drill Rods) Shank H22x108mm, H19x108mm,standard hex, Bit diameters include 20-42mm. 2.Tapered drilling tools(Tapered Drill Steel) Including: Drill rods with Shank H22x108mm,(6,7,11,12 degree taper) taper rods in most lengths. button bits, cross type bits and chisel bits with(6,7,11,12 degree taper). Bit diameter:28mm-57mm. 3.Extension drilling tools Button bit, face design :Flat face, drop centre, Normal and retrac body. tungsten carbide(Buttons):Spherical, ballistic and Conical.(Threaded R32, T38, T45,T51, bit diametre:45mm-127mm); Couplings sleeves-manufactured with a middle stop to prevent walking along the thread. Include couplings sleeve(threaded R22,R25,R28,R32,R38,T38,T45,T51) Shank adapters-carburized and manufactured with tight tolerances and controlled straightness. 4.Down the hole hammers and DTH button bits(Down The Hole Drilling) Offer ir hammers,DHD3.5,DHD340a,DHD360,DHD380,and low pressure hammers CIR65a, CIR90, CIR110, CIR150,CIR170etc,DTH drill bits:60mm-254mm bits with flat face, concave design fit for the atlas copco and ingersoll-rand model etc. 5.Excavate coal cutter bits Include all kinds of round cutter bit and flat cutter bits for excavate coal machine as the replacements of kennametal. Such as U76,U82,U84,U85,U92,U94,U95,U118 And coal bolting bit and coal bolting rod. 6.All kinds of casing bits for shield machine and construction tools. 7.Round road planing bit for road milling machine and trenching machine. Shank dia:19.4mm,25mm,30mm,33mm,38mm,etc. 8.Blast furnace tap hole drill tools.(Rod, Cross type bits, button bits and X type bits etc)