The Symmetrix system is a solution for concentric drilling and simultaneously advancing of pipes and offers several benefits in pipe roofng.
The Symmetrix system components
- a pilot bit which drills the center part of the hole and transfers the impact energy to the ring bit
- a ring bit set, which is an integrated ring bit and casing shoe, welded to the front of first pipe, known
as the starter pipe. The ring bit, which is connected to the pilot bit through locking mechanism, drills the
void needed to advance the pipe into the ground simultaneous to drilling.
Advantages
Straightness,
Internal flushing,
Efficiency and productivity,
Less torque,
Models as follow,
| Model | Outer Dia. of Casing Tube (mm) | Inner Dia. of Casing Tube(mm) | Wall thickness of casing (mm) | Ring Bit Out Dia (mm) | Ring Bit Inner Dia (mm) | Max.Outer Dia of Normal Bit(mm) | Hammer Type | Weight(kg) |
| For Top Hammer Drilling | ||||||||
| P76/8-39 | 76 | 60 | 8 | 88 | 39 | 37 | R32 | 2.5 |
| P88/8-52 | 88 | 72 | 8 | 100 | 52 | 50 | T38 | 5.5 |
| P114/10-59 | 114 | 104 | 10 | 125 | 59 | 57 | T45 | 9.5 |
| P139/10-98 | 139 | 119 | 10 | 158 | 98 | 96 | T45,T51 | 10 |
Order with Pilot bit thread+OD of casing pipe+ID. of casing pipe
Matched casing pipe available.All below listed products are suited for installation of pipe roofs using top hammer drilling technique. Other length and wall thickness can be provided upon request. Larger pipe diameters for installation using special rigs and DTH drilling method can be offered upon request
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