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

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

This product is a 12" long threaded diamond core barrel designed for use with 1-1/2" diameter core bits and barrels. It solves the job problem of extending the reach of core drills to achieve deeper holes in reinforced concrete and masonry materials by adding barrel length between the drill motor and bit. This allows for drilling through thicker or more layered concrete structures without changing the basic bit size.

Threaded core barrels of this type are commonly used in construction, structural, and industrial settings where precise deep core drilling is required. They are compatible with electric, pneumatic, and hydraulic core drill rigs that accept 1-1/2" diameter threaded bits, allowing for modular build-up of drilling length. From a practical rental and customer-support standpoint, these barrels enable efficient core drilling through thick concrete slabs, walls, or columns by coupling multiple barrels and bits as needed, minimizing downtime and reducing the need for switching to larger diameter or special equipment.

Where This Is Used

• Drilling deep cores in reinforced concrete and masonry structures for inspection, sampling, or installation tasks
• Extension use with compatible core bits to increase drilling depth without changing bit diameter
• Construction sites requiring precision holes for anchors, pipe penetrations, or utility routing through thick concrete

Key Details

Selection Notes

From a selection standpoint, confirm that the core barrel’s diameter and thread type match the core bit and drill rig spindle being used. The deciding factor is usually the required core hole diameter and the depth of the concrete or masonry element to be drilled. The 12" length is commonly selected when moderate extension beyond the bit length is necessary without significantly increasing setup complexity or reducing drill stability. If threading does not match or the barrel length is insufficient for the application, consider alternate barrel sizes or consult equipment compatibility. Proper inspection of threads for damage before use is important to maintain a secure connection during drilling.

Drill Setup Notes

When assembling the core barrel with drill bits and rigs, verify full thread engagement and tighten connections hand-tight with a wrench as needed to prevent loosening during operation. Ensure the drill rig is suitable for the 1-1/2" diameter threaded system and can provide adequate rotational torque for deep drilling applications. The barrel adds length to the tooling string, so check for sufficient clearance and support to maintain straight drilling and prevent wobble or bit breakage. Back-up stands or stabilizers may be necessary for deep holes. After use, clean slurry and debris from threads and inspect for any wear or damage prior to reuse.