DOA K0251 AK46S Hydraulic Core Drill 1"-4" (U/W Capable) Product Guide
The DOA AK46S hydraulic core drill is designed for precision drilling of concrete and other solid materials, featuring a core diameter range from 1 inch to 4 inches. Its hydraulic power system provides dependable torque and control, addressing common jobsite challenges such as efficient hole making in reinforced concrete structures, while the added underwater capability supports marine and submerged applications.
This type of hydraulic core drill is commonly used in construction, infrastructure, and civil engineering projects where controlled, dust-minimized coring is required. The hydraulic power source offers consistent torque and power delivery, suitable for demanding environments including topside drilling and underwater scenarios. Operators typically run the drill with a rig or stand to maintain alignment, using water or other fluid to manage slurry and tool cooling. The integrated safety valve prevents overrunning in the event of a drill jam, enhancing control during operation.
Where This Is Used
- Marine construction and underwater drilling projects
- Concrete coring in bridges, tunnels, and industrial facilities
- Subsea infrastructure inspections and maintenance tasks
Key Details
| Equipment Type | Hydraulic core drill |
|---|---|
| Operating Environment | Topside and underwater use (submerged capable) |
| Power System Match | Hydraulic power unit matched to proper flow and pressure |
| Planning Detail | Core diameter range 1" to 4" with bit compatibility for concrete and masonry |
| Setup Requirement | Hydraulic hose routing and return-line verification for kink-free flow; level gauge used to maintain vertical or horizontal drilling alignment |
Selection Notes
When selecting a core drill like the AK46S, verify the hydraulic power unit provides the correct flow rate and pressure to match the tool’s requirements. Planning for the full core diameter range ensures bit availability fits job conditions and material thickness. For underwater applications, confirm hose length and routing allow diver or operator access without restriction or abrasion risk. The presence of a safety valve that stops rotation upon jamming is a helpful feature for continuous operation under heavier loads. Consider rig or mounting options to secure the drill and maintain precise hole alignment using the built-in level gauge. Assess the water or slurry control system to avoid excessive buildup, which impacts drilling visibility and quality.
Drill Setup Notes
Set up the hydraulic hoses carefully to avoid kinks and ensure proper return flow back to the hydraulic power unit for cooling and repressurization. Confirm compatibility of hydraulic couplers and verify whether environmentally acceptable hydraulic fluid can be used when operating near sensitive areas. For underwater use, plan rigging and hose positioning for diver access and stable placement of the drill at the worksite. After underwater or wet operation, flush and rinse the drill with clean fresh water (not saltwater) to remove salt, grit, and slurry. This post-use care supports tool longevity but should complement standard manufacturer maintenance. The on/off trigger with locking capability supports continuous drilling when used with an appropriate drill rig.
DOA AK46 Hydraulic Core Drill – Professional Hydraulic Diamond Core Drill
The DOA AK46 Hydraulic Core Drill is a professional-grade hydraulic diamond core drilling tool designed for demanding concrete, masonry, utility, industrial, marine, and underwater drilling applications. Built for contractors who need reliable performance in harsh jobsite conditions, the AK46 delivers the power, safety, and durability required for both handheld core drilling and drill rig-mounted operation.
Available in two configurations, the DOA AK46 S and DOA AK46 G, this hydraulic core drill is engineered to match different drilling diameter requirements. The AK46 S is designed for smaller diameter holes and higher rotational speed, while the AK46 G provides the torque needed for larger diameter core drilling.
Key Features of the DOA AK46 Core Drill
- Professional hydraulic diamond core drill for concrete, masonry, and reinforced concrete
- Available as the AK46 S and AK46 G models
- Designed for handheld operation or drill rig mounting
- Safe for wet, harsh, and underwater drilling environments
- Lightweight body made from Ergal aluminum and stainless steel
- Low-vibration hydraulic motor for smoother drilling performance
- Automatic safety valve helps stop rotation if the bit jams
- Integrated level gauge for accurate hole alignment
- Ergonomic handles for improved control and operator comfort
- Excellent choice for utility, construction, industrial, and marine contractors
DOA AK46 S Core Drill
The DOA AK46 S is optimized for smaller diameter core drilling where higher drilling speed is required. This model is ideal for plumbing, electrical, mechanical, HVAC, utility, and construction applications where clean, accurate holes are needed in concrete or masonry.
- Recommended core bit range: 30–100 mm / 1.2–4 in.
- Speed at 20 L/min: 1,000 RPM
- Speed at 30 L/min: 1,500 RPM
DOA AK46 G Core Drill
The DOA AK46 G is designed for larger diameter core drilling applications that require increased torque. It is well suited for pipe penetrations, sewer connections, utility openings, marine construction, and heavy-duty concrete coring.
- Recommended core bit range: 80–160 mm / 3.1–6.3 in.
- Speed at 20 L/min: 400 RPM
- Speed at 30 L/min: 600 RPM
Hydraulic Core Drilling Advantages
Unlike electric core drills, the DOA AK46 hydraulic core drill is powered by hydraulic flow, making it a safer and more dependable option for wet jobsites, utility work, trench work, and underwater drilling. Hydraulic operation eliminates the risk of electric shock and allows the tool to perform reliably in environments where electric drills may not be suitable.
The hydraulic motor also provides smooth, controlled power with minimal vibration. This helps reduce operator fatigue, improve drilling accuracy, and protect sensitive structures during concrete and masonry drilling.
Built for Wet and Underwater Drilling Applications
The DOA AK46 is an excellent choice for applications where water exposure is unavoidable. Its hydraulic design makes it suitable for wet drilling, flooded excavations, marine construction, commercial diving work, bridge maintenance, dam repair, and underwater infrastructure projects.
For contractors searching for an underwater hydraulic core drill, the AK46 provides the reliability and safety needed for submerged drilling operations.
Automatic Safety Valve for Operator Protection
The DOA AK46 is equipped with an automatic safety valve designed to help protect the operator and the tool. If the diamond core bit becomes jammed during drilling, the valve helps stop rotation, reducing kickback and improving safety during handheld or mounted operation.
Ergonomic and Lightweight Design
The AK46 is built with a lightweight yet durable combination of Ergal aluminum and stainless-steel components. This construction provides strength, corrosion resistance, and a favorable power-to-weight ratio for professional jobsite use.
The ergonomic design includes an adjustable rear support handle and long side handle for better control during operation. The rear handle allows the operator to apply steady pressure using the chest or knee, helping reduce fatigue during longer drilling jobs.
Handheld or Drill Rig Mounted Operation
The DOA AK46 core drill can be used as a handheld hydraulic drill or mounted to a drill rig for more controlled and accurate coring. This flexibility makes it a practical solution for contractors who need one hydraulic core drill for multiple drilling applications.
For larger diameter or precision drilling, the AK46 can be paired with a compatible drill column to improve stability, alignment, and productivity.
Common Applications
- Concrete core drilling
- Reinforced concrete drilling
- Masonry core drilling
- Utility installation and maintenance
- Water and sewer line work
- Gas pipeline maintenance
- Pipe penetration drilling
- Bridge repair and maintenance
- Marine construction
- Dam and harbor maintenance
- Commercial diving operations
- Underwater core drilling
- Industrial maintenance
- Confined space drilling
- Historic building restoration
Technical Specifications
| Model | DOA AK46 S / DOA AK46 G |
|---|---|
| Tool Type | Hydraulic diamond core drill |
| Hydraulic Flow | 20–30 L/min |
| Operating Pressure | 140–180 bar |
| AK46 S Core Bit Range | 30–100 mm / 1.2–4 in. |
| AK46 G Core Bit Range | 80–160 mm / 3.1–6.3 in. |
| AK46 S Speed | 1,000 RPM at 20 L/min; 1,500 RPM at 30 L/min |
| AK46 G Speed | 400 RPM at 20 L/min; 600 RPM at 30 L/min |
| Core Bit Connection | External 1-1/4" BSP male / Internal 1/2" BSP female |
| Weight | Approx. 8 kg / 17.6 lbs. |
| Construction | Ergal aluminum and stainless steel |
Why Choose the DOA AK46 Hydraulic Core Drill?
The DOA AK46 Hydraulic Core Drill is built for professionals who need dependable drilling power in challenging environments. Its hydraulic drive system provides excellent reliability, low vibration, wet-jobsite safety, and the ability to work underwater. With two model options, operators can choose the right speed and torque range for their specific core drilling application.
Whether you are drilling small utility penetrations, larger pipe openings, reinforced concrete, masonry, or underwater infrastructure, the AK46 offers the performance and durability needed for professional hydraulic core drilling.
DOA AK46 Core Drill for Sale in the United States
Rental Tools Online is a trusted source for DOA hydraulic tools and equipment in the United States. We provide product support, technical guidance, hydraulic power unit recommendations, replacement parts assistance, and professional service for contractors, utility companies, municipalities, industrial maintenance teams, marine contractors, and commercial diving professionals.
Contact us today to request pricing, availability, hydraulic power unit compatibility, or assistance selecting the correct DOA AK46 S or DOA AK46 G hydraulic core drill for your application.
| SKU | 142435 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weight | 18 | ||||||||||||||
| Country of Manufacture | Italy | ||||||||||||||
| Mfr. Model Number | AK46S | ||||||||||||||
| Link to User Manual | No | ||||||||||||||
| Link to Schematics | No | ||||||||||||||
| Link To Catalog | No | ||||||||||||||
| Technical Specifications |
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| Free Shipping | No |
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