
Workpiece Double tube connector
Guide bush
Drill head Bar rest
Outer tube
Inner tube
L5
| L1 | L2' | | | L3 | L2'' | L4 | |
| | Lo (OAL Outer) | | | | | L6 |
| | | Li (OAL Inner) | | | | |
| Lo = | | Outer tube overall length | Outer tube overall length Lo 㲈 L1 + L2 + L3 + L4 - L5 |
| Li | = | Inner tube overall length | |
| L1 | = | Guide bush length (or pilot hole depth) | |
| | | Inner tube overall length Li = Lo + L6 |
| L2 = | | Drilling depth (L2' + L2") | |
| L3 = | | Bar rest length | |
| L4 = | | Length of outer tube in connector* | L6** DTC L4* |
| L5 = | | Length from drill tube tip and peripheral | |
| | DTC 4R (OT00 - OT13) | 120 | 30 |
| edge tip | | | |
| | DTC 5R (OT14 - OT20) | 0 | 190 |
| L6 = | Difference between outer tube length and | | | |
| | DTC 6R (OT212 - OT25) | 0 | 220 |
inner tube length** (mm) For smooth drill entry, make sure that the drill head is inside the guide bushing (or pilot hole) all the way up to 5 mm over the outer tube.
| DCN-DCX | L5 | DCN-DCX | L5 | | DCN-DCX | L5 |
| 18.4 - 20 | 31.5 | | 25 - 26.4 40 | | 38 - 43 | 45 |
| 20.01 - 21.8 | | 33.5 | 26.41 - 31 | 42 | 43.01 - 47 | | 55 |
| 21.81 - 21.99 | | 33.5 | 31.01 - 33.3 | 47 | | 47.01 - 51.7 | 51 |
| 22 - 24.1 | 35.5 | 33.31 - 36.2 | 50 | | 51.71 - 56.2 | 56 |
| 24.11 - 25 | | 35.5 | 36.21 - 39.6 | 55 | 56.21 - 65 | | 66 |
| 25.01 - 26.4 | | 37.5 | 39.61 - 47 | 60 | | 65 - 79.99 | 75 |
| 26.41 - 28 | | 37.5 | 47.01 - 51.7 | 66 | | 80 - 111.99 | 83 |
| | | 51.71 - 65 | 71 | | 112 - 147.99 | 87 |
148 - 183.99 86