SW Kelly Bar · Since 2004
Engineered Depth. Delivered From The Factory That Builds It.
A dedicated Kelly Bar manufacturing base in Xuzhou, China — two workshops covering 60,000 m², engineered around your rig, your depth and your ground rather than pulled from a catalogue. Reliable, sincere and trustworthy. What you see is what you get.
Kelly Bars, drilling tools and casings from one source
Customized Designing and Manufacturing Service
We have developed a complete range of Kelly Bars, drilling tools and casings that integrate with the leading rotary drilling rig brands — Bauer, Soilmec, Casagrande, IMT, MAIT, SANY, XCMG, Zoomlion, Liebherr and CMV. Every bar is drawn against your rig’s actual rotary head interface, torque and crowd force, not taken off a shelf.
Our design team starts from three inputs only: rig model, required depth, ground conditions. From there we select outer diameter, section count, wall thickness, key layout and steel grade, then issue drawings for your approval before a single tube is cut.
- Drive key layout engineered around your actual torque and crowd force
- Seamless alloy steel tube, verified before it ever reaches the welding line
- Heat-treated drive keys — hard wearing surface, tough core, weldable
- Critical welds inspected ultrasonically, with the results recorded per bar
- Every bar fully extended and retracted before it leaves our workshop
Ask For A Quick Quote
Send us the basics and our engineers will come back with a matching
proposal, drawings and a price.
Kelly Bars, Drilling Tools & Casings
Interlocking Kelly Bar
Locked drive keys put full rig torque and crowd force into hard rock — proven to 143 m.
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Friction Kelly Bar
Multi-key drive structure as standard, so SW friction bars outlast ordinary friction bars considerably.
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Multilock (Rack) Kelly Bar
Rack-type continuous steps let you apply crowd force at almost any rotation angle.
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Used & Refurbished Kelly Bar
80–95% new, rebuilt to new-bar standard, 500+ sets in stock, 3-month warranty.
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Drilling Bucket
Clay, rock, cleaning and centrifugal buckets with 130/150/200 mm square kelly box.
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Drilling Auger
Flat clay, flat rock and conical rock augers for cohesive soils to weak rock.
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Core Barrel
Roller bit, round-shank chisel and cross-cutter barrels for rock and boulders.
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Drill Bits & Teeth
Rock, gravel and clay teeth in alloy body with 50–52 HRC working hardness.
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Wall Casing Pipe
Double-wall casing Ø620–2500 mm with matching joints, shoes and drive adapters.
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Casing Joints & Shoes
Male/female joints, casing shoes and drive caps built for repeated make-and-break.
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Tremie Pipe
Threaded or flanged tremie for clean, continuous concrete placement.
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Kelly Bar Attachment
Drive keys, shock absorbers, swivels, lifting lugs and repair kits held in stock.
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Made To Your Rig
Customized Foundation Drilling Tools
Extension Bar
Extra length between the rotary head and the top of your Kelly Bar — gain depth without changing the mast.
Kelly Stub / Adapter
Converts an existing bar to a different rig interface, or adapts a non-standard square box.
Small Kelly Box Auger
130 / 150 / 200 mm square box augers for small rigs, low headroom and micro-piling
Terminal Pipe & Drive Cap
Bottom-end components that carry the crowd force into casing or tooling.
Where They Work
Kelly Bar and Drilling Tools Application
Match the tool to the ground — this is the single biggest factor in metres per hour.
Hard Rock & Strong Weathered Rock
Interlocking bar + rock auger + roller-bit core barrel. Full torque into the face.
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Soft Rock & Dense Sand-Gravel
Friction or combined bar + rock bucket with RP4 teeth.
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Sand, Gravel & Water-Bearing Layers
Friction bar + clay/sand bucket with ventilation pipe to break vacuum.
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Soft Clay & Silt
Friction bar + flat clay auger, cleaning bucket for final bottom clean-out.
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Two Workshops, 60,000 m² — Built For Scale
Scale is the advantage nothing else can copy. Twenty years on, we run two dedicated workshops covering 60,000 m², hold thousands of tonnes of tube in stock, and finish more than a thousand bars a year — all under our own roof, all built by our own people.
◆ 60,000 m² across two workshops — welding, heat treatment, machining and inspection in one place
◆ 1,000+ bars a year — capacity that absorbs rush orders without pushing your date
◆ Thousands of tonnes of tube in stock — the reason our standard lead time is about seven days
◆Nothing outsourced — every critical process is done in-house, so quality is ours to answer for
Why Contractors Choose Us
Why More Than 260+ Contractors Over The World Love Working With Us?
One-Stop Solution
To help you complete foundation bored pile projects, we provide one-stop products: Kelly bar, kelly bar spare parts, drilling tools, casings, tremie pipe and drill bits. Deep foundation drilling equipment designer and manufacturer. Real factory base in China —
Customized On Demand
You provide the design, dimensions or drawings — and we generally come back with a solution within a week. Every bar is drawn to your rig, your depth and your ground.
Top-Notch Quality
We strictly adhere to ISO 9001 standards. We have 20 years of experience manufacturing kelly bars and drilling tools, using seamless alloy steel tube from China’s leading mills.
Cutting-Edge Technology
An automated welding line, dedicated deep-hole and hard-ground designs, and a quality file archived against every bar we build — so the history of your bar is never lost.
Tube selection, key welding, heat treatment, machining and the final telescoping test are all done under our own roof — not brokered out to whoever is cheapest this month.
- Direct control over tube grade and heat treatment
- between the drawing and the finished bar
- Quality file archived against every bar number
Proof, Not Promises
Our Track Record In 30+ Countries
Send us the basics and our engineers will come back with a matching
proposal, drawings and a price.
River Crossing Foundation — Southeast Asia
2009 · SW/MZ575-6×19.4 · 105 m
High-Speed Rail Corridor — Southeast Asia
2018 · SW/MZ630-6×26.5 · 143 m
Second River Crossing — South Asia
2014 · SW/JS630-5×21.5 · 95 m
Second River Crossing — South Asia
2014 · SW/JS630-5×21.5 · 95 m
Second River Crossing — South Asia
2014 · SW/JS630-5×21.5 · 95 m
Corporate Film
Our Company, On Film
One film, twenty years — the shortest way to know who you are dealing with
Drop in your corporate film here. Prospective buyers are not just evaluating a product — they are deciding whether to trust a supplier they have never met with a load-bearing component buried 100 m underground. Seeing the plant, the people and the finished bars stacked in the yard answers that question in a way no specification sheet can.
- Recommended running time 2–3 minutes; 16:9, captioned for overseas buyers
- Cover the plant, the welding line, inspection and export packing
- Guidance and shot list in the Photo & Video Guide
Keep Reading
Related Pages
Go deeper into the topics most buyers check before ordering.
Extension Bar
Extra length between the rotary head and the top of your Kelly Bar — gain depth without changing the mast.
Interlocking vs Friction
Which type fits your ground
Factory & Capacity
60,000+ m2, two workshops
Quality & Inspection
UT, heat treatment, telescoping test
Projects
143 m HSR, 105 m bridge and more
Customized Service
From rig model to approved drawing
Get An Accurate Quote For Your Rig
Tell us your rig model, required depth and ground conditions. Our engineers will return a matching Kelly Bar proposal with drawings, normally within 24 hours.