Pipe Roofing System
CONCENTRIC DRILLING SYSTEM
Symmetrix Concentric Overburden Drilling Tooling Set
Concentric ring-bit overburden drilling system designed to drive large diameter steel casing pipes through gravel, boulders, and loose ground with straight hole accuracy.
System
Concentric Symmetrix
Components
Pilot Bit, Ring Bit, Casing Shoe
Alignment
High Straight-Hole Accuracy
Overburden
Gravel, Sand, Boulders
ENGINEERING METRICS
TECHNICAL DATA & SPECIFICATIONS
System Type
Concentric Ring Bit with Integrated Casing Shoe
Components
Pilot Bit + Sacrificial / Retrievable Ring Bit + Casing Shoe
Hole Diameter Range
114mm, 140mm, 168mm, 193mm, 219mm
Hammer Compatibility
Standard DTH Hammers (DHD, COP, Mission Shanks)