Eagle Claw SD
Aggressive carbide cutting for sandstone and shale, built for demanding pilot-bore work.
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HDD bits and blades
Start the bore with the right cutting geometry.
Genuine Melfred Borzall bits and blades, selected around formation, rig capability and steering requirements.
Explore bits & bladesApproved product range
Nine genuine Borzall cutting options.
Every card shows the complete tool and the approved Best / Better / Good formation guidance. Final selection should also consider rig make, thrust, housing and connection.
Red Diamond
Premium hard-ground bit for caliche, gravel and shale with broad mixed-ground capability.
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Steep Taper UltraBit
Steep taper profile for caliche and cobbles where focused cutting and steering control matter.
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Iron Fist
Heavy cutting geometry for cobbles and gravel, with useful performance in compact formations.
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UltraBit
Versatile pilot bit for sandstone and shale across a wide HDD operating window.
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Rock Saw
Saw-style blade for gravel and hardpan, designed to cut and steer through difficult formations.
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Excalibur
Clean, controllable cutting for clay and sand with dependable steering in softer ground.
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Bear Claw
Robust mixed-ground bit for gravel and sand with secondary hard-ground capability.
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Chunky Valu-Blade
Cost-effective blade for sand, clay and forgiving soils where clean steering is the priority.
Check rig compatibility →Ground-condition guide
Choose from the formation outward.
Use the approved ratings as a first-pass guide, then confirm the complete assembly with TA Drilling.
BestThe primary formations for this cutting profile.
BetterStrong secondary applications with the right setup.
GoodSupporting applications where site conditions permit.
Tooling support
Match the bit, housing and connection.
Send your rig model, transmitter, existing tooling and ground information. TA Drilling will help specify the compatible assembly.
Talk to TA Drilling