1-1/4″ UNC Dry Concrete Core Drill Bit
The 1-1/4″ UNC Dry Diamond Core Bit is designed for high-speed, water-free drilling in foam bricks, red brick walls, and lightweight concrete. Featuring industrial-grade diamond segments and a universal 1-1/4″ UNC thread, it is compatible with most standard hand-held or rig-mounted dry core drilling machines.
1-1/4″ UNC Dry Diamond Core Bit Overview
The 1-1/4″ UNC Dry Diamond Core Bit is designed for high-speed, water-free drilling in foam bricks, red brick walls, and lightweight concrete. Featuring industrial-grade diamond segments and a universal 1-1/4″ UNC thread, it is compatible with most standard hand-held or rig-mounted dry core drilling machines.
Ideal for professional installers, electricians, and contractors, this bit delivers clean, efficient performance for dry coring tasks on construction sites where water cooling is not available. The optimized design helps manage heat and maintain cutting efficiency over extended use.
Note: Not recommended for drilling through reinforced concrete or heavy rebar.
Key Features
• Optimized for Dry Cutting
Engineered for dry drilling applications, eliminating the need for water cooling—perfect for sites where wet drilling is impractical or restricted.
• High-Speed Drilling Performance
Durable diamond segments ensure fast, clean cuts with minimal resistance through foam brick, red brick, and low-density concrete.
• 1-1/4″ UNC Universal Thread
Compatible with most standard rotary core drilling machines equipped with a 1-1/4″ UNC thread.
• Efficient Heat Dissipation
The design promotes airflow, improving dust removal and reducing friction during high-speed drilling to prevent overheating.
• Available Sizes and Customization
Diameters range from 30mm to 83mm, with standard lengths of 370mm and 450mm. Custom sizes and finishes are available upon request.
Product Specifications
Typical Applications
• Drilling ventilation or cable routing holes in interior brick walls
• Installing electrical conduit or junction boxes
• Dry coring in renovation or retrofit construction
• Quick penetration through soft masonry with minimal cleanup
Pro Maintenance Tips
To ensure optimal performance and extend the life of your 1-1/4″ UNC Dry Diamond Core Bit, follow these expert maintenance tips:
• Keep the Bit Cool
While designed for dry cutting, take regular breaks between drilling sessions to prevent overheating. Let the bit cool down between uses.
• Clean the Bit After Use
Clear any dust and debris after each use to keep the bit performing efficiently. Use a soft brush or air blower for cleaning.
• Inspect for Wear
Regularly inspect the diamond segments for signs of wear or damage. Replace the bit when segments are noticeably dull or worn down.
• Store Properly
Store the bit in a dry, safe place to prevent exposure to moisture and corrosion. Keep it away from high-impact areas to protect the threads.
• Use the Correct Speed
Maintain a drilling speed of 400-600 RPM for optimal performance. Proper speed ensures efficient cutting and minimizes premature wear.
Why Choose Our Dry Core Bits
• Stable, reliable performance across a variety of masonry surfaces
• Strict quality control and durable diamond segment welding
• OEM/ODM services available for size, branding, and packaging
• Fast lead times and flexible support for wholesale and distributor orders
