
Oil pressure head Bar rest Bar clamp
Drill head Drill tube
| L1 | L2' | L3 | L2'' | L4 |
| OAL |
| OAL = | Drill tube overall length | 㲈 | |
| Drill tube length OAL L1 + L2 + L3 + L4 - L5 | |||
| L1 | = | Oil pressure head length | |
| L2 | = | Drilling depth (L2' + L2") | |
| L3 | = | Bar rest length | |
| L4 | = | Drill tube clamp length | |
| L5 | = | Length from drill tube tip |
and peripheral edge tip
| DCN-DCX | L5 | DCN-DCX | L5 | DCN-DCX | L5 | |
| 16 - 16.5 | 31.5 | 25 - 29.99 | 45 | 38 - 43.99 | 40 | |
| 16.51 - 17.25 | 31.5 | 30 - 33.99 | 50 | 44 - 51.99 | 50 | |
| 17.26 - 18 | 31.5 | 34 - 36.99 | 50 | 52 - 56.99 | 60 | |
| 18.01 - 19 | 31.5 | 37 - 39.99 | 55 | 57 - 67.99 | 70 | |
| 19.01 - 19.99 | 31.5 | 40 - 43.99 | 60 | 68 - 161.99 | 80 | |
| 20 - 21.99 | 33 | 44 - 51.99 | 65 | 162 - 257.99 | 105 | |
| 22 - 24.99 | 35 | 52 - 56.99 | 70 | 258 - 293.99 | 90 | |
| 25 | 35 | 57 - 65 | 75 |
25.01 - 26.99 40 27 - 28 40