SOLLROC symmetric system are made of high quality alloy steel and carbide with strict heat treatment. It is widely used and proven in many work sites for foundation, piling, water well drilling, etc. We have full range of sizes and various types for drilling in all ground conditions.
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SOLLROC Wing type overburden casing system is for sumiltaneously drilling and casing outer diameter 6 5/8" inch (168.3mm) to 16 inch (406mm).
The wing extend out further than casing pipe diameter to achieve reaming diameter as large as possible.
Rapid penetration and minimum drilling time
Wear-resistance and longevity.
Bit wings retract inside the casing when the hammer is pulled off bottom without reverse rotation.
|Casing tube OD||Number of Wing ||Extend diameter ||Casing shoe inner Dia.||fit shank of hammer|