CS Unitec 12" Threaded Core Barrel – 3-1/2" diameter

CS Unitec 12" Threaded Core Barrel – 3-1/2" diameter Product Guide

The CS Unitec 12" Threaded Core Barrel with a 3-1/2" diameter is a specialized drilling accessory designed for deep core drilling in reinforced concrete and masonry. It solves the problem of obtaining precise, cylindrical cores from hard structural materials, which is essential for testing, installation of anchors or sleeves, and other construction or demolition applications.

This type of core barrel is commonly used with electric, pneumatic, or hydraulic drill rigs. The threaded design allows it to securely attach to compatible drill rigs and core bits, providing stability for deep drilling tasks. It is especially useful in situations where longer drill cores are needed beyond standard lengths, as it can be extended by connecting multiple barrels. In rental and job-site support, ensuring compatibility with the rig’s power source and proper barrel length planning is often the key to efficient setup and operation.

Where This Is Used

• Deep core drilling in reinforced concrete structures such as bridges, buildings, or slabs
• Core sampling and material testing in construction and civil engineering
• Installation preparation for anchors, sleeves, or utilities where precise, clean cores are required

Key Details

Selection Notes

When selecting a threaded core barrel, verify the diameter matches the drill bit and rig system to avoid compatibility issues. The 3-1/2" diameter is a common size for many medium-duty drilling tasks, but check project-specific core diameter requirements first. Planning the barrel length is important for deep cores; multiple barrels can be connected, but consider rig capability and site access when assembling. Thread compatibility should also be confirmed to ensure a secure and stable connection, which affects drilling accuracy and tool longevity.

Drill Setup Notes

The barrel’s threaded design allows for rigid connection to the drill rig and core bit, enabling deep drilling with reduced risk of wobble or misalignment. Confirm the drill rig’s power type—electric, pneumatic, or hydraulic—and match the barrel and bit threading accordingly. Manage water supply or slurry extraction during drilling to maintain drill bit cooling and debris removal. After use, clean barrels and bits to prevent slurry buildup and inspect all connections for wear or damage before the next job. Proper storage and handling will extend barrel life and help ensure consistent drill performance.