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Joint Zone K0119 AK50 Hydraulic Core Drill 14"-28" Product Guide
The Joint Zone K0119 AK50 is a hydraulic core drill engineered for creating large-diameter holes between 14 and 28 inches. It's designed to tackle heavy-duty drilling tasks where substantial hole sizes are necessary, such as cutting precise circular openings in concrete, masonry, or other industrial materials. This tool addresses jobsite challenges where robust, reliable drilling capacity is required without the convenience of an included stand, emphasizing the need for proper mounting or rig support to achieve stability during operation.
This type of hydraulic core drill is commonly used in construction, infrastructure repair, and industrial maintenance projects where larger core diameters are needed for installations, pipe penetrations, or removal of large material sections. From a rental and on-site support perspective, it is important for users to arrange a compatible hydraulic power unit that meets the necessary flow and pressure requirements. The absence of a drill stand means that setup planning should include a secure rig or mounting solution that can handle the drill's operating forces and support efficient operator control during use.
Where This Is Used
- Industrial and commercial concrete drilling projects requiring large core diameters
- Infrastructure work, such as drilling openings for utility lines, plumbing, or mechanical penetrations
- Heavy construction sites where heavy-duty hydraulic drilling equipment is needed
Key Details
Equipment Type Hydraulic Core Drill Operating Environment Industrial and construction topside use Power/System Match Requires compatible hydraulic power unit with appropriate flow and pressure Planning Detail Drill capacity supports 14" to 28" diameter core drilling; no stand included Setup Requirement Requires external rig or mounting to secure drill during operation; hydraulic hose routing must allow for proper operator access and avoid kinks or abrasion Selection Notes
When selecting a hydraulic core drill for large-diameter holes, confirm the hydraulic power unit matches the flow and pressure requirements of the AK50. Ensure that the rig or mounting available on-site can safely handle the drill's torque and weight, since the unit itself does not come with a stand. The deciding factor often involves the diameter of the hole needed and the material hardness. If bits in the range of 14" to 28" are required, this drill fits, but verify clearance and access at the drilling point. Planning for water supply and slurry management is also important to maintain drilling effectiveness and site cleanliness.
Drill Setup Notes
Verify hose length and routing to allow operator access without restricting hydraulic flow or causing hose wear. Securely mount the drill using a rig or frame capable of withstanding drilling forces. Confirm hydraulic couplers are compatible and that the hydraulic return line can handle flow returning to the power unit tank. After use, clean the drill to remove concrete slurry and debris, inspecting bit connections and hydraulic couplings for wear before the next operation.
- Description
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Details
DOA AK50 Hydraulic Core Drill – Heavy-Duty Hydraulic Diamond Core Drill for Holes up to 28 Inches
The DOA AK50 Hydraulic Core Drill is a professional-grade hydraulic diamond core drilling system engineered for contractors, utility crews, municipalities, commercial diving companies, marine contractors, and industrial maintenance professionals who require exceptional drilling performance in the toughest working conditions. Designed and manufactured in Italy, the AK50 delivers outstanding power, reliability, and precision for drilling large-diameter holes in reinforced concrete, masonry, rock, bridge structures, marine infrastructure, tunnels, dams, and utility installations.
Unlike conventional electric core drills, the DOA AK50 operates from a hydraulic power source, making it an ideal solution for environments where electric tools are unsafe or impractical. It excels in wet conditions, underwater applications, confined spaces, hazardous environments, and remote job sites where hydraulic equipment is already in use.
Capable of drilling holes up to 28 inches in diameter, the AK50 combines tremendous drilling capacity with six interchangeable hydraulic motor options that allow operators to optimize drilling speed and torque for virtually any diamond core bit size.
Built for Demanding Industrial Applications
The DOA AK50 has been engineered specifically for continuous heavy-duty operation. Its rugged construction uses premium-quality components designed to maximize service life while minimizing maintenance requirements. Whether performing structural modifications, installing large utility penetrations, or completing underwater infrastructure repairs, the AK50 is built to withstand harsh jobsite conditions.
Because hydraulic motors generate high torque with fewer moving parts than electric motors, operators benefit from:
- Long service life
- Exceptional reliability
- Consistent drilling performance
- Reduced maintenance requirements
- Safe operation in wet environments
- No electric motor or electrical power cord at the tool
- Excellent performance in harsh industrial conditions
The AK50 is also available in an underwater configuration, making it an outstanding solution for commercial diving operations, offshore construction, bridge maintenance, dam repairs, harbor infrastructure, and underwater utility work.
Six Hydraulic Motor Configurations for Maximum Performance
One of the AK50's biggest advantages is its interchangeable hydraulic motor system.
Rather than using a single compromise speed, the drill can be configured with six different hydraulic motor sizes, allowing contractors to match drilling speed and torque to the diameter of the diamond core bit being used. This can help improve drilling efficiency, maximize bit performance, reduce equipment wear, and increase productivity.
The smallest motor provides rotational speeds up to 1,750 RPM for small-diameter drilling, while the largest motor delivers high torque at approximately 90 RPM for drilling holes up to 28 inches in diameter.
Recommended Core Bit Size by Hydraulic Motor
Selecting the proper hydraulic motor helps provide the correct balance of drilling speed and torque. Each motor is optimized for a specific range of core bit diameters based on hydraulic flow.
Hydraulic Motor Speed at 7.9 GPM Recommended Core Bit Diameter Speed at 10.0 GPM Recommended Core Bit Diameter 20 cc 1,400 RPM 2–4 in. 1,750 RPM 1–2 in. 50 cc 600 RPM 3–5 in. 760 RPM 2–4 in. 100 cc 300 RPM 5–10 in. 380 RPM 5–7 in. 160 cc 180 RPM 12–14 in. 220 RPM 10–12 in. 200 cc 150 RPM 16–24 in. 190 RPM 10–16 in. 315 cc 90 RPM 20–28 in. 120 RPM 18–24 in. Core bit size ranges are based on the manufacturer's published recommendations. U.S. measurements have been converted from metric and rounded to the nearest whole inch. Actual drilling performance may vary depending on concrete strength, aggregate, reinforcement, bit type, water flow, hydraulic pressure, and drilling conditions.
Choosing the Correct Hydraulic Motor
- 20 cc Motor: Best for approximately 1–4 inch core bits used for conduit, anchors, plumbing, and electrical penetrations.
- 50 cc Motor: Optimized for approximately 2–5 inch core bits commonly used for HVAC, utility, and general construction work.
- 100 cc Motor: Ideal for approximately 5–10 inch core bits used for medium-diameter structural openings and utility installations.
- 160 cc Motor: Designed for approximately 10–14 inch core bits used in commercial construction and infrastructure projects.
- 200 cc Motor: Delivers exceptional torque for approximately 10–24 inch core bits used for oversized utility penetrations and heavy concrete drilling.
- 315 cc Motor: Provides maximum torque for approximately 18–28 inch core bits, making it ideal for bridge construction, offshore work, marine infrastructure, dams, and large-diameter industrial drilling applications.
Designed for Large-Diameter Core Drilling
The DOA AK50 is suitable for demanding core drilling applications including:
- Reinforced concrete drilling
- Bridge construction and repair
- Marine construction
- Commercial diving operations
- Dam maintenance
- Offshore platforms
- Utility pipe penetrations
- Water and sewer infrastructure
- Electrical conduit installation
- Fiber-optic conduit installation
- HVAC openings
- Tunnel construction
- Industrial plant maintenance
- Concrete wall penetrations
- Heavy civil construction
- Rock drilling
Its large drilling capacity and multiple motor options make the AK50 one of the most versatile hydraulic core drills available for industrial, infrastructure, marine, and commercial applications.
Hydraulic Performance
The AK50 operates from hydraulic power units commonly used throughout the construction, utility, and marine industries.
Operating Specifications
- Hydraulic Flow: 7.9–10.0 GPM
- Operating Pressure: 1,740–2,900 PSI
- Hydraulic Power Required: Approximately 12 HP
- Speed Range: 90–1,750 RPM
These specifications allow contractors to operate the AK50 from compatible hydraulic power packs used for hydraulic breakers, saws, pumps, and other hydraulic tools.
Rugged, Compact Design
Despite its tremendous drilling capacity, the DOA AK50 remains compact and relatively easy to transport.
Dimensions
- Weight: Approximately 29 lbs.
- Length: Approximately 21 in.
- Height: Approximately 9 in.
Its compact, durable design makes setup, transportation, and positioning easier than many competing large-capacity drilling systems.
Standard Core Bit Connection
The DOA AK50 features a professional spindle configuration designed for compatibility with diamond core drilling accessories.
- 1-1/4 in. BSP Male Spindle
- Internal 1/2 in. BSP Female Thread
Core bit compatibility should be confirmed before ordering, particularly when using U.S.-standard threaded bits or adapters.
Optional Underwater Configuration
For marine contractors and commercial divers, the AK50 is available in a dedicated underwater configuration designed specifically for submerged drilling operations. This version provides heavy-duty hydraulic drilling performance without requiring an electric motor at the drill.
Typical underwater applications include:
- Bridge inspections and repairs
- Harbor and dock infrastructure
- Offshore platforms
- Dam maintenance
- Underwater pipeline installation
- Marine construction
- Commercial diving projects
Drill Stand Compatibility
The DOA AK50 is designed for use with a professional drill stand to provide stability, accuracy, and controlled feed during large-diameter drilling operations.
Important: The drill stand is sold separately unless otherwise specified in the quotation or product listing.
Why Choose the DOA AK50 Hydraulic Core Drill?
- Drills holes up to approximately 28 inches in diameter
- Six interchangeable hydraulic motor options
- High torque across a wide drilling range
- Designed for demanding industrial applications
- Low-maintenance hydraulic motor design
- Suitable for wet and harsh working environments
- Optional underwater configuration
- Heavy-duty European construction
- Excellent power-to-weight ratio
- Designed for continuous professional use
Whether drilling reinforced concrete, installing large utility penetrations, performing underwater construction, or completing bridge rehabilitation projects, the DOA AK50 Hydraulic Core Drill delivers the power, precision, and reliability required by professional contractors and industrial operators.
DOA AK50 Technical Specifications
Specification DOA AK50 Maximum Hole Diameter Approximately 28 in. Weight Approximately 29 lbs. Dimensions Approximately 21 × 9 in. Hydraulic Flow 7.9–10.0 GPM Operating Pressure 1,740–2,900 PSI Hydraulic Power Required Approximately 12 HP Speed Range 90–1,750 RPM Spindle Connection 1-1/4 in. BSP Male / Internal 1/2 in. BSP Female Hydraulic Motor Options 20 cc, 50 cc, 100 cc, 160 cc, 200 cc, and 315 cc Underwater Version Available Drill Stand Sold Separately Common Search Terms
DOA AK50 hydraulic core drill, hydraulic diamond core drill, hydraulic concrete core drill, industrial hydraulic core drill, large-diameter core drill, underwater core drill, marine hydraulic drill, commercial diving core drill, hydraulic drilling machine, bridge core drill, offshore hydraulic drilling equipment, reinforced concrete core drill, infrastructure drilling equipment, hydraulic construction tools, professional hydraulic coring machine, heavy-duty diamond core drill, DOA hydraulic tools, hydraulic coring system, and concrete drilling equipment.
- Specifications
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Specifications
SKU 142899 Weight 29 Country of Manufacture Italy Mfr. Model Number AK50 Link to User Manual No Link to Schematics No Link To Catalog No Technical Specifications No Free Shipping No - Product Questions
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