Focus on Kelly Bars customized for Casagrande/Bauer/Liebherr/IMT/MAIT/CMV drilling rigs. SW Kelly bar ●20+ years of professional concentration ●1000+ sets Kelly bar of annual production ●10000+ sets Kelly bar...
A Kelly bar is a telescoping square- or hexagonal-section mast used on piling rigs to transmit rotation and torque from the rotary head down to drilling tools and casings. It lets rigs drill deep bored piles or drive casing without a continuous drill string, by extending sections as depth increases. Kelly bars are heavy, precision components that must match the rig’s rotary coupling and travel length for safe, efficient piling work.
Verify the Kelly bar’s top coupling type, spline pattern, overall travel length, and sectional dimensions against your rig’s rotary head and mast specs. Confirm lifting points and mounting brackets match or can be adapted.
Check splines and coupling faces for wear, pin bores for ovality, section welds for cracks, straightness along the bar, and corrosion or gouges on slides and guides. Ask for service records and nondestructive test results if possible.
Kelly bars are long and heavy — typically shipped on flatbeds or lowboys. Ensure proper blocking, chaining at rated tie-down points, and compliance with oversize permits. Protect exposed splines and bearings from moisture and impact.
Regularly grease sliding surfaces and bearings, inspect splines and pins after heavy jobs, torque-check couplings, and repair welds or replace worn sections promptly. Follow manufacturer lubrication intervals and store vertically or supported to prevent bending.
Major manufacturers supply replacement sections, splined couplers, pins, and seals, but lead times can vary. Verify part numbers and section dimensions before purchase and consider sourcing a spare section for critical projects.