CS Unitec 12" Threaded Core Barrel – 3" diameter Product Guide

The CS Unitec 12" Threaded Core Barrel with a 3" diameter is a specialized attachment designed for deep drilling applications. It is used to extend the reach of core drilling rigs, allowing for precise extraction of concrete and masonry cores. The threaded design enables secure connection with compatible drill rigs and bits, addressing the challenge of drilling deep, reinforced materials where surface drilling is insufficient.

This type of core barrel is commonly employed with electric, pneumatic, or hydraulic drill rigs. It fits between the drill motor and the diamond core bit, providing added length for accessing recessed or deep structural elements. Rental use often involves projects such as utility penetrations, structural investigations, or installation of anchors and sleeves where controlled, deep cores are required. Proper connection and alignment ensure stable drilling and reduce bind or deviation in demanding environments.

Where This Is Used

• Deep drilling into reinforced concrete and masonry structures
• Installation of plumbing, electrical, or mechanical sleeves and penetrations
• Structural testing, sampling, and investigation of thick concrete elements

Key Details

Selection Notes

When selecting a core barrel extension, confirm the diameter matches the drill bit size—in this case, a 3" core diameter. Check that the barrel’s thread matches the drill rig and bit threads to ensure secure and precise connection. The choice of barrel length depends on the depth of the core required; 12" is suited for moderate deep drilling but longer barrels may be needed for greater depths. This barrel is suitable for use with various power sources, but confirm that the rig’s power and speed settings are appropriate for the combined drill barrel and bit length. Proper alignment and drill stand setup reduce binding and improve drilling accuracy.

Setup Notes

Before starting a job, inspect all threaded connections for damage or wear to avoid loosening during drilling. Assemble the barrel and bit securely, checking for tightness but avoiding over-tightening which can damage threads. For water-cooled drilling, verify water supply and flow to manage slurry and cooling effectively. When used with hydraulic or pneumatic rigs, confirm hose or air-line length and routing maintain clear paths without kinking. After use, clean the core barrel to remove slurry and debris, preventing buildup that can impair thread engagement or drill performance on subsequent jobs.