Tube length for special drills Drill tubes with non-standard lengths will be available upon request. Please use the guide below to calculate the drill tube length. Workpiece Oil pressure head Bar rest Drill head Bar clamp Drill tube L5 L1 L2' L3 L2'' L4 OAL OAL = Drill tube overall length L1 = Oil pressure head length Drill tube length OAL = L1 + L2 + L3 + L4 - L5 L2 = Drilling depth (L2' + L2") L3 = Bar rest length L4 = Drill tube clamp length L5 = Length from drill tube tip and peripheral edge tip MBU UTE BTU DCN-DCX L5 DCN-DCX L5 DCN-DCX L5 8 - 8.32 18 12.6 - 12.92 19 12.6 - 17.7 20 8.33 - 8.65 18 12.93 - 12.99 19 17.71 - 19.2 23 8.66 - 8.99 18 13 - 13.25 19 19.21 - 21.8 22 9 - 9.32 18 13.26 - 13.6 19 21.81 - 24.1 23 9.33 - 9.65 18 13.61 - 13.93 19 24.11 - 28.7 24 9.66 - 9.99 18 13.94 - 13.99 19 28.71 - 33.3 27 10 - 10.32 18 14 - 14.26 19 33.31 - 36.2 26 10.33 - 10.65 18 14.27 - 14.6 19 36.21 - 40.6 29 10.66 - 10.99 18 14.61 - 14.93 19 40.61 - 43 28 11 - 11.32 18 14.94 - 15.26 19 43.01 - 47 30 11.33 - 11.65 18 15.27 - 15.59 19 47.01 - 51.7 29 11.66 - 11.99 18 15.6 - 15.96 20 51.71 - 56.2 32 12 - 12.36 18 15.97 - 16.32 20 56.21 - 58.4 34 12.37 - 12.73 18 16.33 - 16.7 20 58.41 - 65 33 12.74 - 13.1 18 16.71 - 17.03 20 13.11 - 13.49 18 17.04 - 17.36 20 13.5 - 13.82 18 17.37 - 17.7 20 13.83 - 14.15 18 17.71 - 18.09 19 14.16 - 14.48 18 18.1 - 18.48 19 14.49 - 14.79 18 18.49 - 18.9 19 18.91 - 19.26 19 19.27 - 19.62 19 19.63 - 20 19 Tungaloy 17