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The Hyundai DURAWING 90 is a Concentric Overburden System designed for casing of 125 mm diameter holes through varying formations into bed rock.
The wing bits are enclosed making them the most professional & efficient system on the market today as they are not exposed to "clogging" in loose overburden material while drilling down to the bedrock.
When the drilling starts, the bit wings protude utilising a unique cam sliding mechanism. The key feature of the DURAWING 90 is the self actuating wing bit system that works perfectly everytime.


Drilled Hole Diameter: 125mm

Casing Size O/D: 115mm

I/D: 101.6mm 


Major Body Diameter: 101mm

Length: 411mm (IR3.5)

System Open: 125mm

Casing Size: 101.6 / 115mm

Total Weight (approx): 13kg

Hammer Type: IR3.5 

Casing Drill Bit - Durawing 90

SKU: Durawing SUS90
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