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146mm Concentric Casing System for Demanding Piling | MSD

146mm Concentric Casing System for Demanding Piling | MSD
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Concentric Overburden Casing System for 146mm Casing
Tackle tough piling jobs with confidence. Our 146mm Concentric Casing System, powered by a DHD340 class pilot bit, drills and cases simultaneously through the most difficult overburden. Build a secure foundation. Explore the system!
Model Number: MSD-CCS-D340-146
System Type: Concentric Overburden Casing System
Casing Outer Diameter: 146 mm (5.75")
Pilot Bit Shank: DHD340
Primary Application: Demanding Piling, Deep Anchoring, Civil Engineering

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  • Product Description

The Challenge: Drilling in Difficult Ground

Drilling through loose overburden like sand, gravel, or backfill often leads to collapsing holes, stuck equipment, and significant project delays. In fractured or weathered rock, borehole integrity is constantly at risk, making it nearly impossible to achieve a clean, stable hole for piling or anchoring. These challenging ground conditions demand more than just a standard drill bit—they require a complete engineered system.

Our Solution: Simultaneous Drilling and Casing

MSD's Concentric Casing System is the definitive solution to these challenges. This advanced system features a pilot bit and a ring bit that work in unison. As the pilot bit drills the center of the hole, the ring bit simultaneously expands the hole to a larger diameter, allowing the 146mm steel casing to advance down with the drill string. This innovative process drills and cases the hole at the same time, completely securing the borehole wall from the moment drilling begins.

Key Features and Advantages

  • Guaranteed Borehole Integrity: By casing the hole as it is drilled, this system completely eliminates the risk of hole collapse, ensuring a clean and stable large-diameter borehole.

  • Exceptional Hole Straightness: The concentric design provides superior guidance, delivering perfectly straight holes which is critical for the structural integrity of deep foundation piles.

  • Powered by DHD340 Class Hammers: The pilot bit features a DHD340 shank, designed to handle the high impact power of 4-inch class DTH Hammers for efficient drilling through tough overburden.

  • System Reusability: After reaching the desired depth into bedrock, the pilot bit is easily retracted through the casing for use on the next hole, making the system a highly cost-effective investment.

Primary Applications

  • Demanding Foundation Piling: The primary application. Ideal for large-scale construction projects requiring 146mm piles to be drilled through challenging overburden or boulder-filled ground.

  • Deep Ground Anchors: A perfect system for installing deep, large-diameter ground anchors for major civil engineering projects like bridges and retaining walls.

  • Pre-Drilling for Larger Piles: Can be used to create a secure, cased pilot hole for even larger piling systems.

Technical Specifications

MSD-CCS-D340-146 Concentric Overburden Casing System

Casing Outer Diameter (OD)

146mm

Casing Inner Diameter (ID)

126mm

Casing Wall Thickness

10mm

Drilled Hole Diameter

124mm

Pilot Bit Diameter

10mm

Compatible Shank Type

COP44/DHD340/TH4/SD4/QL40

Max. Pass-Through Diameter

110mm

Weight

22kg

Standard & Custom-Engineered Solutions

Whether your project requires a proven tool from our standard catalog or a completely custom-engineered solution, our team of drilling experts is ready to assist. 

We excel at solving unique geological challenges and developing tools for non-standard requirements.

Contact us today to find the perfect standard bit or to begin engineering your unique tool for success!


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