Foundation Drilling Machine
View system integration details
Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Kelly Bar used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.
A canonical Kelly Bar is characterized by the integration of Kelly Bar Body and Upper Connection (Box). In industrial production environments, manufacturers listed on CNFX commonly emphasize High-strength alloy steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.
A hollow, square or hexagonal steel bar that transmits torque and vertical force from the drilling rig's rotary table to the drill string in foundation drilling operations.
Technical details and manufacturing context for Kelly Bar
Commonly used trade names and technical identifiers for Kelly Bar.
This component is essential for the following industrial systems and equipment:
| pressure: | Up to 500 bar (dependent on wall thickness and material grade) |
| temperature: | -20°C to 150°C (operational range for standard steel grades) |
| vertical load: | Up to 3000 kN (axial compression/tension capacity) |
| torque capacity: | 50 kNm to 1000 kNm (varies by cross-section and size) |
| slurry concentration: | Up to 40% solids by weight (for standard abrasion-resistant grades) |
Verified manufacturers with capability to produce this product in China
✓ 92% Supplier Capability Match Found
Authentic performance reports from verified B2B procurement managers.
"Great transparency on the Kelly Bar components. Essential for our Machinery and Equipment Manufacturing supply chain."
"The Kelly Bar we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements. (Delivery took slightly longer than expected, but technical support was excellent.)"
"Found 16+ suppliers for Kelly Bar on CNFX, but this spec remains the most cost-effective."
“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”
A Kelly Bar transmits both torque from the rotary table and vertical force to the drill string, enabling efficient drilling in foundation and piling applications.
Kelly Bars are manufactured from high-strength alloy steel to withstand extreme torque, compression, and abrasion during demanding drilling operations.
Key components include the Kelly Bar body (hollow square/hexagonal), upper connection (box), lower connection (pin), Kelly flats for torque transmission, and internal bore for fluid flow.
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