TUBE DOUBLE TUBE SYSTEM - INNER FOUR START THREAD Drill range 0.725 - 6.771 d2H7 d DH8 H d1 H7 D L d dy L 1) 1) d2 d1 d D H H dy d L L 1) 1) Outer Tube Inner Tube Dimension Dimension Drill Range Outer Tube Inner Tube D d d1 d2 H S D dy d 0.725 - 0.787 BTDO 018 0.709 0.472 0.551 0.630 1.08 0.39 BTDI 012 0.472 0.394 0.354 0.788 - 0.858 BTDO 019.5 0.768 0.551 0.630 0.709 1.18 0.47 BTDI 014 0.551 0.472 0.433 0.859 - 0.949 BTDO 021.5 0.846 0.591 0.689 0.768 1.18 0.47 BTDI 015 0.591 0.512 0.472 0.949 - 1.039 BTDO 023.5 0.925 0.630 0.748 0.827 1.18 0.47 BTDI 016 0.630 0.551 0.512 1.040 - 1.130 BTDO 026 1.024 0.709 0.827 0.925 1.30 0.63 BTDI 018 0.709 0.630 0.551 1.130 - 1.220 BTDO 028 1.102 0.787 0.906 1.004 1.30 0.63 BTDI 020 0.787 0.709 0.630 1.221 - 1.311 BTDO 030.5 1.201 0.866 1.004 1.102 1.30 0.63 BTDI 022 0.866 0.787 0.709 1.311 - 1.425 BTDO 033 1.299 0.945 1.063 1.181 1.57 0.79 BTDI 024 0.945 0.866 0.787 1.426 - 1.559 BTDO 035.5 1.398 1.024 1.181 1.299 1.57 0.79 BTDI 026 1.024 0.945 0.866 1.559 - 1.693 BTDO 039 1.535 1.142 1.299 1.417 1.57 0.79 BTDI 029 1.142 1.063 0.984 1.693 - 1.850 BTDO 042.5 1.673 1.260 1.417 1.535 1.57 0.79 BTDI 032 1.260 1.181 1.102 1.851 - 2.035 BTDO 046.5 1.831 1.378 1.555 1.693 1.73 0.94 BTDI 035 1.378 1.260 1.181 2.036 - 2.213 BTDO 051 2.008 1.535 1.713 1.850 1.73 0.94 BTDI 039 1.535 1.417 1.339 2.213 - 2.559 BTDO 055.5 2.185 1.693 1.870 2.008 1.73 0.94 BTDI 043A 1.693 1.575 1.496 2.559 - 2.756 BTDO 056 2.205 1.693 1.850 2.047 2.95 1.26 BTDI 043B - 1.575 1.496 2.756 - 2.874 BTDO 062 2.441 1.890 2.087 2.283 2.95 1.26 BTDI 048 - 1.732 1.614 2.874 - 3.149 BTDO 068 2.677 2.087 2.283 2.480 2.95 1.26 BTDI 053 - 1.890 1.772 3.150 - 3.425 BTDO 075 2.953 2.323 2.520 2.756 3.82 1.73 BTDI 059 - 2.126 1.969 3.425 - 3.937 BTDO 082 3.228 2.598 2.795 3.031 3.82 1.73 BTDI 066 - 2.362 2.205 3.937 - 4.409 BTDO 094 3.701 3.071 3.228 3.504 3.82 1.73 BTDI 078 - 2.756 2.598 4.409 - 4.881 BTDO 106 4.173 3.543 3.740 3.976 4.65 2.36 BTDI 090 - 3.150 2.992 4.882 - 5.354 BTDO 118 4.646 3.622 4.213 4.449 4.65 2.36 BTDI 092 - 3.150 2.992 5.354 - 5.826 BTDO 130 5.118 4.094 4.685 4.921 4.65 2.36 BTDI 104 - 3.740 3.583 5.827 - 6.299 BTDO 142 5.591 4.567 5.157 5.394 5.47 2.83 BTDI 116 - 3.937 3.780 6.299 - 6.771 BTDO 154 6.063 6.220 5.630 5.866 5.47 2.83 BTDI 128 - 4.724 4.567 1) Please indicate overall length(L) when ordering. *For diameter range 0.725- 2.559 (OT13) the inner tube should be ordered 1.181 longer than the outer tube. *For diameter range 2.559- 4.881 (OT14 - OT20) the inner tube should be ordered 7.480 longer than outer tube. *For diameter range 4.882- 7.244 (OT21 - OT25) the inner tube should be ordered 8.661 longer than the outer tube. 661