CS Unitec 36" Threaded Core Barrel – 2-1/2" diameter

CS Unitec 36" Threaded Core Barrel – 2-1/2" diameter Product Guide

The CS Unitec 36" Threaded Core Barrel is a drilling accessory designed to extend the depth reach of compatible core drill rigs in demanding applications such as reinforced concrete and masonry drilling. By attaching this threaded barrel to a core bit, operators can perform deep drilling tasks more efficiently without repeatedly changing bits or rigs.

This type of core barrel is commonly used in conjunction with electric, pneumatic, or hydraulic drill rigs that accommodate threaded core bits and barrels. Rental customers often add barrels of varying lengths to match project depth requirements. The threaded connection allows for secure assembly and reliable torque transfer in tough drilling conditions, offering flexibility in reaching deep or difficult-to-access drilling zones on job sites.

Where This Is Used

• Deep core drilling in reinforced concrete structures such as bridges, buildings, and industrial floors
• Masonry drilling applications including stone and brick walls for installing anchors, conduits, or pipe penetrations
• Construction and renovation projects requiring precise, long-depth boreholes for structural sampling or utility installation

Key Details

Selection Notes

When selecting a threaded core barrel, consider the required drilling depth and compatibility with your core bit and drill rig. The 2-1/2" diameter barrel is intended for bits of the same diameter range; ensure the thread pitch and size match the core bit and rig threads to maintain a secure attachment during operation. This barrel length of 36" suits deep core drilling jobs where a standard-length barrel or bit combination will not reach the target depth. In rental work, it's common to add one or multiple barrels in series to reach the necessary drilling length. Planning for water supply and slurry removal at depth is important to maintain bit cooling and core extraction efficiency.

Drill Setup Notes

Confirm the thread compatibility between the core barrel, bit, and drill rig before starting the job to avoid assembly or performance issues. Threaded diamond segments on bits used with this barrel usually have a thickness of approximately .187" for bits under 7" in diameter, which aids in cutting durability. When setting up, position the rig and drill to allow proper hose or air-line routing as appropriate to the power source, avoiding sharp bends or kinks. Provide an adequate water supply for dust suppression, cooling, and slurry removal, especially for deep drilling. Regular inspection of the threaded connections during the job helps prevent loosening or damage. After use, clean the barrel and bit to remove slurry, dust, and debris, preserving the tools for subsequent use.