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The Hyundai DURAWING 280 is a Concentric Overburden System designed for casing of 340 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 280 is the self actuating wing bit system that works perfectly everytime.

 

Drilled Hole Diameter: 340mm

Casing Size O/D: 323.9mm

I/D: 301.7mm 

 

Major Body Diameter: 300mm

Length: 774mm

System Open: 340mm

Casing Size: 301.7 / 323.9mm

Total Weight (approx): 213kg

Hammer Type: QL80,  SD10 

Casing Drill Bit - Durawing SUS280

SKU: Durawing Bit SUS280