KELLY EXTANTION

KELLY EXTANTION – High-Precision Drilling Extension for BAUER, LIEBHERR, SOILMEC, SANY, and XCMG Machines

The KELLY EXTANTION is a critical component designed to extend the operational depth of rotary drilling rigs, significantly enhancing the versatility and reach of bored pile machinery. Whether tackling deep foundation projects in urban high-rises or remote infrastructure developments, this robust extension bar is engineered for performance, precision, and endurance in the most demanding geotechnical environments.

At 3GEN Export, we supply KELLY EXTANTION units tailored to the highest standards of accuracy and compatibility, ensuring seamless integration with industry-leading bored pile machine brands including BAUER, LIEBHERR, SOILMEC, SANY, and XCMG.

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What is a KELLY EXTANTION?

The KELLY EXTANTION is a high-strength steel tube that serves as a modular lengthening section for Kelly bars used in rotary drilling. By coupling with the primary Kelly bar, this extension allows operators to drill deeper shafts without switching machines or compromising structural rigidity. It maintains optimal torque transmission and alignment, which are vital for vertical precision and borehole stability.

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Key Technical Features

• Material Composition: Fabricated from premium-grade alloy steel for enhanced tensile strength and fatigue resistance

• Welded Joint Construction: Fully welded with reinforced joints to ensure structural integrity under extreme torque loads

• Precision Machined Ends: Custom-profiled locking head and square shoulder for secure connection with male/female Kelly ends

• Length Variations: Available in standard lengths of 3 m, 4.5 m, and 6 m; customizable based on project scope

• Surface Coating: Corrosion-resistant industrial yellow powder coat for weather protection and easy identification on site

• Hollow Shaft Design: Maintains drill string balance and lowers the total weight without sacrificing strength

• Easy Installation: Quick coupling mechanism enables swift assembly/disassembly, minimizing downtime

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Performance Advantages

• Increased Drilling Depth: Extend the effective working range of your rig without investing in a larger machine

• Precision and Stability: Maintains concentricity throughout the borehole, reducing deviation and improving pile alignment

• Cost Efficiency: Eliminates the need for frequent equipment upgrades by enhancing the adaptability of existing rigs

• Modular Utility: Compatible with both single and telescopic Kelly bar systems

• Versatility Across Soil Conditions: Performs exceptionally in soft soils, gravels, and dense clays with minimal wear

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Compatible Machinery Models

The KELLY EXTANTION is manufactured for perfect mechanical fit with the following bored pile machines:

BAUER

• BG 20

• BG 28

• BG 36

• BG 40

LIEBHERR

• LB 28

• LB 36

• LB 44

SOILMEC

• SR-60

• SR-80

• SR-100

SANY

• SR205

• SR285R

• SR360

XCMG

• XR180D

• XR280D

• XR400E

If you require confirmation on additional compatibility, our technical team can provide support with your machine’s configuration details.

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Application Scenarios

• Bridge Foundations: Deep pile drilling for highway and rail bridge piers

• Skyscraper Projects: Foundation shafts for high-rise buildings in urban environments

• Marine Construction: Piling in ports, harbors, and overwater structures

• Wind Turbine Installations: Foundation drilling for onshore and nearshore wind energy projects

• Subway and Metro Systems: Urban underground infrastructure development

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Why Choose 3GEN Export?

At 3GEN Export, we’re not just a supplier — we’re a trusted global OEM solution partner. Every KELLY EXTANTIONwe deliver undergoes stringent dimensional inspections, material tests, and stress simulations to ensure unmatched performance in the field.

Here’s what sets us apart:

• OEM-grade precision manufacturing

• Worldwide shipping within 5 business days

• Inventory ready for immediate dispatch

• Fully protected transactions and warranty coverage

• In-house engineering support for compatibility and customization

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Maintenance and Longevity

To maximize the lifespan and performance of your KELLY EXTANTION, we recommend:

• Regular inspection of connection ends for wear

• Proper lubrication at coupling joints to avoid friction damage

• Avoidance of over-torqueing during assembly

• Cleaning post-operation to prevent concrete or soil buildup

• Storage in dry environments with anti-corrosion treatment when idle

With these measures, your investment will yield consistent and reliable output across multiple projects.

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Packaging & Delivery

Each KELLY EXTANTION is packaged in reinforced wooden crates, equipped with protective caps and rust-preventive coatings for safe transit. We handle all documentation for international logistics, including customs declarations and export certifications.

You can expect:

• Dispatch within 5 working days

• Worldwide delivery options

• Pre-shipment inspection photos and quality certificates upon request

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Final Thoughts

If your next deep foundation project demands strength, precision, and efficiency, the KELLY EXTANTION is the upgrade your drilling setup needs. Trusted by global contractors and compatible with the industry’s most powerful machines, this extension bar unlocks deeper potential in every bore.

Get in touch with 3GEN Export today to secure your KELLY EXTANTION unit and enhance your drilling capabilities — wherever your projects take you.

Manufactured in Turkey, these products are made using the latest technologies and built to meet the highest international standards. Each machine is a high-quality copy of the original, ensuring durability, precision, and performance that you can rely on for modern construction and metalworking projects.