Description
HDD Rock Drill Bit Sizes
Tri-Hawk HDD rock drill bits are available in multiple sizes to suit different drilling requirements and hole diameters.
| Rock Bit Size | Part Number | Recommended Hole Size |
|---|---|---|
| 2.75″ | BR275 | 3.50″ – 4.00″ |
| 3.00″ | BR300 | 4.50″ – 5.00″ |
| 3.50″ | BR350 | 5.50″ – 6.00″ |
Need a different size or configuration? Contact No Dig Equipment to discuss your requirements.
Australian-Made HDD Rock Drill Bits
Drilling through rock and abrasive formations places significant demands on HDD tooling. Tri-Hawk rock drill bits are designed to handle these demanding conditions while providing the cutting performance and steering control required for directional drilling.
The bits are manufactured in Australia and are designed specifically for HDD applications where conventional drilling bits may not provide the performance required.
Suitable for challenging ground conditions
Tri-Hawk HDD rock drill bits are suitable for applications involving:
- Hard rock
- Weathered rock
- Shale
- Limestone
- Pindan
- Gravel
- Cobble
- Abrasive formations
- Mixed ground conditions
Selecting the correct bit for the formation being drilled can help improve penetration, reduce unnecessary wear and maintain drilling performance throughout the bore.
Independent Three-Cutter Design
Tri-Hawk rock drill bits use an independent cutting path designed to progressively break down the formation as the bit advances.
Rather than relying on a single cutting path, the three cutters work progressively through the formation.
1. Initiate the Cut
The first cutter begins the cutting path through the formation, establishing the initial cut.
2. Create a Deeper Relief Cut
The second cutter follows the initial path and creates a deeper relief cut within the formation.
3. Break the Chip
The third cutter completes the cutting process by breaking the material between the previous cutting paths.
This progressive cutting action is designed to improve cutting efficiency while helping the bit maintain control as it works through hard ground.
Field-Serviceable Carbide Cutters
HDD rock drilling can place considerable wear on cutting components. Tri-Hawk rock bits are designed with field-serviceable carbide cutters, allowing worn cutters to be serviced without necessarily replacing the complete bit.
The cutters can be accessed through the service openings in the bit, helping contractors maintain their tooling and reduce unnecessary downtime.
Benefits of field-serviceable cutters
- Service worn cutters in the field
- Extend the usable life of the bit
- Reduce tooling replacement costs
- Minimise downtime between drilling jobs
- Maintain cutting performance as required
Proper inspection and servicing of cutters should be carried out according to the manufacturer’s recommendations and the conditions of the drilling application.
HDD Rock Bit Applications
Tri-Hawk rock drill bits are designed for HDD contractors working across a range of underground drilling applications.
They can be used for projects including:
- Underground utility installation
- Telecommunications installations
- Electrical and power crossings
- Water and sewer installations
- Pipeline installation
- Road crossings
- Rail crossings
- Civil infrastructure projects
- Hard rock HDD
- Challenging trenchless drilling applications
The correct tooling should always be selected based on the drilling machine, formation, bore requirements and overall ground conditions.
Choosing the Right HDD Rock Drill Bit
Ground conditions can vary significantly from one HDD project to another. The right rock bit depends on factors such as the hardness and abrasiveness of the formation, the required bore diameter and the drilling equipment being used.
Before selecting a rock drill bit, consider:
Ground conditions
Identify whether the formation consists of hard rock, weathered rock, shale, limestone, gravel, cobble or mixed ground.
Required bore size
Select a bit that is appropriate for the required pilot bore and hole diameter.
Drill rig compatibility
Ensure the bit and connection are suitable for your HDD drill and tooling configuration.
Cutting requirements
Consider the hardness, abrasiveness and composition of the formation when selecting your tooling.
If you’re unsure which rock bit is right for your application, speak with the No Dig Equipment team before ordering.
Why Choose No Dig Equipment?
No Dig Equipment supplies HDD equipment and trenchless drilling tooling for contractors across Australia.
Our range includes tooling for soil, rock and challenging ground conditions, giving contractors access to equipment designed for different stages of the HDD process.
Australian-Made Tooling
Tri-Hawk rock drill bits are manufactured in Australia and designed specifically for demanding HDD applications.
HDD Tooling Specialists
We supply a range of horizontal directional drilling equipment and tooling for contractors working across different ground conditions and applications.
Technical Support
Not sure which bit or tooling configuration you need? Our team can help you select equipment based on your drill, bore requirements and ground conditions.
Quality HDD Equipment
From rock drill bits and reamers to drill rods and other HDD tooling, we supply equipment designed for the demands of trenchless construction.
Frequently Asked Questions
What are HDD rock drill bits used for?
HDD rock drill bits are used for horizontal directional drilling through hard, abrasive and challenging ground conditions. They are suitable for formations such as rock, shale, limestone, gravel, cobble and weathered ground.
What ground conditions are Tri-Hawk rock drill bits suitable for?
Tri-Hawk rock drill bits are designed for challenging formations including hard rock, weathered rock, shale, limestone, pindan, gravel and cobble. The appropriate bit should be selected according to the specific ground conditions and drilling requirements.
What sizes are Tri-Hawk HDD rock drill bits available in?
Tri-Hawk HDD rock drill bits are currently available in 2.75″, 3.00″ and 3.50″ sizes, with recommended hole sizes ranging from approximately 3.50″ to 6.00″.
Are Tri-Hawk rock drill bits Australian-made?
Yes. Tri-Hawk HDD rock drill bits are manufactured in Australia and are designed for horizontal directional drilling applications.
Can the carbide cutters be replaced?
Tri-Hawk rock drill bits feature field-serviceable carbide cutters, allowing worn cutting components to be serviced without necessarily replacing the entire bit. Servicing should be carried out according to the manufacturer’s recommendations.
How do I choose the right HDD rock bit?
The correct rock bit depends on the ground formation, required bore size, HDD drill rig and tooling configuration. If you’re unsure which bit is suitable for your project, contact No Dig Equipment for assistance.
Need an HDD Rock Drill Bit?
Whether you’re drilling through hard rock, shale, limestone, cobble or other abrasive formations, choosing the right HDD tooling can make a significant difference to drilling performance.
Talk to the No Dig Equipment team about Tri-Hawk HDD rock drill bits and find the right tooling for your application.
Contact us today for pricing, availability and technical assistance.
