S e c t i o n 7 - P a g e 6 May 2013 Self Drilling Bolt continued Gr out Swivels Gr out Swivels a re used for simultaneous drill and gr out installation, to inject gr out into the bor e of a r otating DSI Hollow Bar . The unit comprises of a heat tr eated shaft (to withstand the impact ener gy fr om the hammer drive) and a housing into which the gr out is pumped. Inlet ports within the shaft enable gr out to be pumped into the bor e of the bar . A locator frame is r equir ed (bolted to the drill sledge) to pr event the housing fr om r otating with the shaft, as well as positioning it at the corr ect location to enable unr estricted operation of the hammer . Accessories Grout Swivel (rig installation) Grout Swivel (hand held installation) Diameters A vailable for Both Drill Bit T ypes R25 1.65", 2" R32 2", 3" R38 3", 3.5" R51 3.5", 4.53" Drill T ooling A range of drill accessories ar e available, to enable connection between the output drive of the drilling head and the dif fer ent DSI Bar diameters. Air Flush Shank (hand held installation) Balance Rod Reducing Coupler Reducing Coupler (with centre bridge) EX / EXR Har dened cr oss cut drill bit, suitable for the majority of applications including narr ow bands of soft r ock. (EXR denotes r etr ofush version) Soil types: Fills, Shales, and Gravels. EXX T ungsten carbide chisel drill bit. EXX is the har dest drill bit available, for str ong r ock, har d seams and concr ete footings. Rock types: Str ong r ock, Metamorphic and Igneous Rocks i.e. Slate and Granite. Drill Bits www .dsiundergr ound.com