CS Unitec 48" Threaded Core Barrel – 3-1/2" diameter

CS Unitec 48" Threaded Core Barrel – 3-1/2" diameter Product Guide

The CS Unitec 48" Threaded Core Barrel with a 3-1/2" diameter is a specialized drilling accessory used to extend drill depth when coring through concrete, masonry, and other hard materials. It solves the problem of deep drilling beyond the reach of standard core bits by allowing users to attach additional length to the drill string while maintaining a secure, threaded connection that can withstand heavy-duty operations.

This threaded core barrel is commonly used with electric, pneumatic, or hydraulic drill rigs designed for core drilling. It is selected when deeper holes are needed, such as for installing anchors, plumbing, electrical conduits, or HVAC systems in reinforced concrete structures. Its robust threaded design ensures stable coupling to core bits and other barrel sections while drilling through dense materials. This product is essential for projects requiring precision and reliability where drilling beyond typical bit lengths is necessary.

Where This Is Used

• Deep core drilling in reinforced concrete and masonry
• Construction and structural retrofitting projects
• Installation of utilities requiring extended hole depths

Key Details

Selection Notes

From a selection standpoint, confirm that the core barrel's diameter matches the bit and rig setup to ensure a secure threaded connection. The 3-1/2" diameter is well-suited for medium-sized holes where the drilling depth exceeds standard bit length. Consider the material being drilled, as reinforced concrete demands durable segments and sturdy barrels. Thread compatibility with existing tooling is crucial to avoid mismatches that could cause thread damage or drilling inefficiencies. For deep drilling, plan rig stability and support to handle the extension length and associated torque. Segment thickness, typically .187" for smaller diameters like 3-1/2", should be verified to meet the cutting requirements of the task.

Drill Setup Notes

Ensure threaded barrels are tightly secured to both the core bit and drill rig spindle to maintain alignment and reduce the risk of binding or looseness during operation. Check that the segments on the core barrel and bit are appropriate for the material hardness and structure to optimize drilling efficiency and wear. When planning drilling runs with multiple barrels, verify that thread compatibility and barrel length accommodate the required hole depth without compromising tool control or rig balance. For hydraulic or pneumatic drills, confirm that power delivery and torque settings are within limits to handle the added length and cutting resistance. After drilling, clean the core barrel and threads thoroughly to remove slurry and debris, which helps maintain connection integrity and extend tool life.