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China's leading manufacturer and exporter of high-performance interlocking & friction Kelly bars. Engineered for durability, precision, and maximum torque transfer in demanding piling applications.
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Mait is a professional manufacturer and exporter of interlocking and friction Kelly bars based in China, specializing in high-quality components for Bauer hydraulic rotary drill rigs. Our Kelly bars are engineered to deliver superior performance in deep foundation drilling, pile driving, and geotechnical applications.
Each Kelly bar is fabricated from ultra-high-tensile steel to ensure minimal weight without compromising strength. With precision-welded drive keys and lock recesses, our products provide reliable torque transmission and crowd pressure transfer from the rotary drive to the drilling tool.
We serve clients across Asia, Africa, Europe, and South America, offering OEM/ODM services, fast delivery, and strict quality control in accordance with international standards.
Precision-engineered Kelly bars compatible with a wide range of Bauer drill rig models. Available in interlocking and friction types with 2 to 5 telescopic sections.
Interlocking type, 3-section telescopic design for high-torque applications.
Friction type, 2-section telescopic, ideal for medium-depth piling.
High-strength steel, interlocking mechanism, 3 sections.
Heavy-duty version with reinforced joints and enhanced load capacity.
Designed for large-diameter bored piles, 4-section telescopic.
High-performance model with optimized weight-to-strength ratio.
Precision-machined drive keys for smooth engagement and long life.
Top-tier model for extreme conditions, 5-section telescopic design.
Balanced design for versatility in urban and remote sites.
Heavy-duty variant with enhanced corrosion resistance.
Maximum depth capability with advanced telescoping system.
Specialized model for high-frequency drilling operations.
Engineered for performance, durability, and reliability in the most challenging drilling environments.
Precision drive keys ensure maximum torque transmission from rotary drive to drill tool.
Fabricated from ultra-high-tensile steel for optimal strength-to-weight ratio.
2 to 5-section configurations for depth flexibility and operational efficiency.
Laser-cut components and CNC welding ensure dimensional accuracy and reliability.
Efficient logistics network ensures timely delivery to any destination.
Each unit undergoes rigorous testing for strength, alignment, and performance.
A Kelly bar is a telescopic shaft used in hydraulic rotary drill rigs to transfer torque from the rotary drive and crowd pressure from the crowd system to the drilling tool, enabling deep foundation drilling and piling operations.
Interlocking Kelly bars use a key and recess system to engage each section, allowing higher torque transmission. Friction Kelly bars rely on hydraulic pressure to extend and lock sections, offering faster operation but lower torque capacity.
Our Kelly bars are designed for Bauer models including BG 22, BG 24, BG 26, BG 30, BG 36, BG 40, BG 42, BG 46, BT 75, BS 80, BS 95, and TR480F series, among others.
We use high-tensile and ultra-high-tensile steel alloys to ensure strength, durability, and minimal weight. All materials are sourced from certified suppliers and tested for quality.
Yes, we provide OEM and ODM services. Our engineering team can design and manufacture Kelly bars to meet specific client requirements, including non-standard lengths, diameters, and connection types.
Standard products are typically shipped within 15-20 days after order confirmation. Custom orders may take 30-45 days depending on complexity. We offer sea, air, and express shipping options worldwide.
For inquiries, quotes, or technical support, please contact us directly through the official website.
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