A kelly bar (also known as drill kelly bar or rotary drilling kelly bar) is the core component of rotary drilling rigs, responsible for transmitting high torque, transferring drilling pressure, and guiding the drill bit in foundation construction. At PLUTO , we focus on manufacturing premium interlock and friction kelly bars, engineered with exceptional durability, high torsion resistance, and reliable performance to meet the demands of diverse geotechnical drilling applications.
Our kelly bars are precision-manufactured to deliver superior wear resistance and high torsion strength, making them ideal for pile foundation construction, urban construction, bridge engineering, and other deep foundation projects. Whether you operate small-scale rotary drilling rigs for residential construction or large equipment for heavy-duty infrastructure, PLUTO’s kelly bars are the optimal solution to boost drilling efficiency and extend equipment service life.
Dual Structure Options: We provide two proven kelly bar designs to match your operational needs:
Friction Kelly Bar: Perfect for soft to medium soil conditions, enabling smooth telescoping for fast, efficient drilling in non-abrasive formations.
Interlock Kelly Bar: Designed for hard rock, complex geology, and high-torque scenarios, delivering maximum torque transmission and load-bearing capacity for deep, challenging boreholes.
Universal Compatibility: PLUTO’s kelly bars are fully compatible with leading rotary drilling rig brands, including XCMG, SANY, LOVOL, OSANT, JOVE, SUNWARD, YUTONG, ZOOMLION, JINTAI, BAUER, SOLMEC, MAIT, CMV, IMT, CASAGRANDE, HITACHI, LIEBHERR, ensuring seamless integration with your existing equipment.
Premium Material & Manufacturing: Crafted from high-strength alloy steel with advanced heat treatment processes, our kelly bars offer exceptional wear resistance, impact resistance, and fatigue strength, even in harsh construction environments.
Customizable Specifications: We offer a full range of standard kelly bar models with diameters from 290mm to 630mm, 3-6 telescopic sections, and drilling depths from 24m to 150m. Custom sizes and configurations are available to meet unique project requirements.
High Torsion & Wear Resistance: PLUTO’s kelly bars are engineered for high wear and torsion resistance, ensuring stable torque transmission, reduced downtime, and lower maintenance costs throughout their service life.
Application Scenarios
PLUTO’s kelly bars are widely applied in:
Pile foundation construction for high-rise buildings, bridges, and ports
Urban subway and tunnel foundation engineering
Wind power and solar farm foundation drilling
Road and railway infrastructure projects
Water conservancy and hydropower construction
All types of rotary drilling rig operations, from small to large-scale equipment
