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The Hyundai DURAWING 129 is a Concentric Overburden System designed for casing of 164 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 129 is the self actuating wing bit system that works perfectly everytime.


Drilled Hole Diameter: 150mm

Casing Size O/D: 145mm

I/D: 126.6mm 


Major Body Diameter: 129mm

Length: 516mm (DHD350)

System Open: 164mm

Casing Size: 152.4 / 132.4mm

Total Weight (approx): 30kg

Hammer Type: SD4, SD5, QL40, QL50, DHD340, DHD350, M40, Mach44, Mach50, M50,MC55 

Casing Drill Bit - Durawing 129

SKU: Durawing Bit SUS129
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