Summary:
To serve global foundation contractors faster and with greater certainty, JM (Xuzhou Jiuman Machinery Technology Co., Ltd.) has added a new 2,000 m² plant dedicated to precision-engineered Kelly bars and a refurbishment & maintenance center for rotary drilling rigs. The expansion enhances throughput, shortens lead times, and systematizes quality control—from raw material processing to full-rig calibration—so your team gets predictable meters in the ground.
Why We Expanded—And What It Means for You
Foundation projects live and die by drilling speed, hole quality, and uptime. Contractors told us three things matter most:
Kelly bars that match local geology and rig brand—and arrive on time
Refurbished rigs that are diagnosed, overhauled, and calibrated, not just repainted
A supplier who stands behind the equipment with data, spares, and practical support
The new 2,000 m² facility helps us do all three at scale: more lines for interlocking and friction Kelly bars, a dedicated bay for rig teardown/inspection, and a controlled area for final calibration & documentation before export.
Who We Are (In Case You’re New Here)
JM is a source manufacturer of Kelly bars with over 20 years of engineering experience, exporting to 15+ countries and regions, operating out of a modern 10,000 ㎡ manufacturing footprint—with the new 2,000 ㎡ plant now focused on bars and rig refurbishment. We also supply inspected used rotary drilling rigs and excavators, plus critical spare parts.
Kelly Bars: Built for Geology, Tuned for Productivity
Our lines cover interlocking (rock & large diameters) and friction (medium soils) Kelly bars. What customers notice most:
Advanced design + high-strength alloy steels; secondary heat treatment on key steels to raise torsional capacity
Integrated key strip strategy and double retaining ring to improve wear life and full-extension guidance
Customization on stages, lock geometry, drive adapters, wear protection, and lengths
Factory checks for telescoping clearance and lock engagement before shipment
Result: bars that stay straight, engage cleanly, and transmit torque with less downtime.
Lead Time & Examples
For representative models like the MZ630-6×24 friction bar, typical production cycle is 3–7 working days (standard configurations). Spec, weight, packaging and service notes are listed on the product page and can be mirrored across custom builds.
Full-Cycle Support: Parts, Service, and Practical Help
Equipment works best with a reliable parts pipeline and reachable engineers. Our Comprehensive Support System includes:
24/7 after-sales remote technical support & scheduled maintenance reminders
Genuine parts with pre-stocking and emergency channels (drive stub, wear plate, slewing bearing, springs, ropes, etc.)
Consultation on equipment selection and site conditions; rental options in select cases
This keeps rigs drilling and bars cycling without avoidable stops.
Proof You Can See: Cases, Videos, and Brands
From Indonesia, Vietnam, Mexico, Malaysia, Saudi Arabia, Pakistan, India, UAE, Algeria to domestic metro and bridge jobs, our bars and rigs have worked across geologies and standards. Explore Cases for site photos and Videos for operating clips; see compatibility with major brands like SANY, XCMG, ZOOMLION, BAUER and more.
What the Expansion Adds—Concretely
The 2,000 m² plant is built around process control:
Cutting & forming: fully-automatic laser cutting and large-gantry precision; improved rigidity and accuracy on thick plates
Welding: FANUC robotic cells + dedicated Kelly-bar welding special machine for bi-directional weld quality and repeatability
Inspection: inline dimensional checks; key strip wear allowance control; concentricity and straightness gauges
Documentation: every batch ships with inspection/assembly data; rig refurb includes calibration logs and spares lists
These upgrades mirror the equipment showcased on your product technical sections and bring that capability into a line-balanced flow dedicated to bars and rigs.
One Supplier, Complete Package
Some projects want bar-only. Others prefer a matched set: rig + Kelly bar + drilling tools. We support both, ensuring telescoping/lock engagement and torque/crowd windows are validated before shipment—so commissioning time shortens and the first day on site is productive.
How to Get a Fast, Useful Quotation
Send us a brief and we’ll map options (bar type, stage counts, lead times, price bands):
Location & ground: a few lines on geology (clay/sand/gravel/weathered rock)
Diameters & depths: your target ranges
Rig model: brand/series or Kelly box dimensions
Timeline & shipping constraints
Package preference: Kelly bar only, or rig + bar (+ tools)
- Contact: WhatsApp +86 188-5216-7087 or email zhenghan.zhang@jmachglobal.com (beverly.liu@jmachglobal.com, wayne.wang@jmachglobal.com,gloria@jmachglobal.com). You can also use the Contact Us form on the website.
