Little Gecko® welding carriages · Engineering, QC & worldwide export from Beijing, China
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Straight-Rail Welding Carriage — ZG Series

Rigid rack track with strong magnetic (or suction) fixing for long, perfectly straight seams on flat plate, box beams and panel lines. Sprocket drive delivers steady travel from 0 to 1100 mm/min.

Also known as: straight rail welding carriage, welding tractor, rail welding carriage, welding travel carriage.

Not sure this is the right model for your job?Which welding carriage is right for your application? →
Straight track welding carriage
Straight track welding carriage on vertical seam
Straight track carriage welding horizontal seam on steel plate
Straight track carriage welding vertical seam, close-up

Straight Seams, Zero Wandering.

Strong magnetic adsorption fixes the rack track to the workpiece — position it once and the carriage runs the whole seam with a steady torch angle. Built for long straight seams on carbon steel plate from 3 mm.

  • Carbon steel plate ≥ 3 mm, long straight seams
  • Horizontal, flat, vertical and fillet welding positions
  • Integrated type includes intermittent welding; split type can add it as an option
  • Optional battery power pack for work sites without easy power access
  • Adjustable swing width 0–32 mm; oscillator rotation ±60°
Request ZG Series Quote
Watch It Work

Application Videos

Straight-track carriage — long seam welding
Straight-track carriage — vertical welding
Specifications

ZG Series Technical Data

ItemSpecification
Carriage modelZG-III-Q1/Z (straight swing)
External power supplyAC 110–220 V, 50/60 Hz (voltage ±10%)
Operating voltageDC 24 V
Ambient temperature−20 to +60 °C (dry bulb)
Ambient humidity0–90% relative humidity
Drive modeSprocket drive (host walk)
Welding speed0–1100 mm/min (digital display)
Minimum plate thickness (magnetic fixing)3 mm (magnetically permeable material)
Carriage dimensions (L×W×H)236 × 365 × 230 mm
Carriage weight7.8 kg
Swing modeStraight swing
Swing width0–32 mm (digital, simulated value)
Oscillating speed0–99 (digital display, simulated value)
Stay time left / right0–99 (digital display, simulated value)
Centre offset compensation±5 mm
Torch adjustment — vertical65 mm (vertical slide)
Torch adjustment — horizontal90 mm (main unit left/right adjustment)
Oscillator rotation±60°
Torch nozzle travel angle±25°
Straight track (type C)Precision linear rail SGR20, aluminium housing with 2 hardened bearing-steel shafts, 1960 × 60 × 20 mm, 9 kg per rail; 15 × 15 module-1.5 rack on the side
Magnetic blockV-type 12 T metal-handle magnetic base, 120 × 50 × 55 mm, 2 kg each, holding force 35 kg per block
Track assembly weight15 kg; quick-connect joint plate, approx. 10 s to mount one rail
Standard configurationCarriage ×1 · Straight-swing oscillator ×1 · Type-C straight rails ×2 · Power unit ×1 · Power cable ×1 · Tool kit ×1 · Documents ×1 · Packaging ×1
PackingFoam packing 2050 × 90 × 60 mm, 18 kg · Wooden case 510 × 410 × 420 mm, 26 kg

Options & Customization

  • Suction-cup fixing for stainless and non-magnetic plate
  • Extra rack track for longer seams or a spare set for continuous production
  • Support rod set for thin plate or lightly curved workpieces
  • Battery power pack and intermittent welding module

Download the Datasheet

Full technical data for this machine in a printable English PDF — specifications, configuration and options. Hand it to your engineering team.

Download Datasheet (PDF)

Values are taken from the product operation manual. Custom configurations — track length, torch fixture, dual-torch setup, expanding-head size — are quoted to your workpiece.

Naming guide: ZG-III-Q1 = straight-rail magnetic · "Z" = straight swing, "J" = angle swing · first letter uppercase = integrated type, lowercase = split type.

"/C" magnetic models hold by strong magnets — for carbon steel plate from 3 mm. "/X" vacuum-suction models hold by suction cup — they work on any flat material from 3 mm, including stainless steel and other non-magnetic plates.

ModelFixingTypeSwing
ZG-III-Q1/Z-CMagneticIntegratedStraight swing
ZG-III-Q1/J-CMagneticIntegratedAngle swing
Zg-III-Q1/Z-CMagneticSplitStraight swing
Zg-III-Q1/J-CMagneticSplitAngle swing
ZG-III-Q1/Z-XSuctionIntegratedStraight swing
ZG-III-Q1/J-XSuctionIntegratedAngle swing
Zg-III-Q1/Z-XSuctionSplitStraight swing
Zg-III-Q1/J-XSuctionSplitAngle swing
FAQ

Questions Engineers Ask About This Machine

Which welding process does it need — MIG/MAG, and can it use stick electrodes?
The carriage works with the MIG/MAG (GMAW) wire process: any MIG/MAG power source, torch, wire feeder, welding wire and shielding gas that supports it. Stick electrodes (SMAW) cannot be used. A stick electrode is itself the consumable and shortens as it melts, so it cannot be fed to the arc at a constant rate — which is exactly what automatic welding requires. Wire, fed by a wire feeder at a set speed, can be — and that is what makes automation possible in the first place.
What is included — and does the carriage include the welding machine, torch, wire feeder and wire?
No. The carriage ships as the automation unit only: travel carriage, oscillator, track and control box. Not included: the welding machine (power source), the welding torch, the wire feeder, the welding wire and the shielding gas. Those four stay yours — the carriage connects to the MIG/MAG power source, wire feeder and torch you already own through a two-pin ignition control lead, so your welders keep the equipment they know. The universal torch fixture accepts Ø18–25 mm torches (200–500 A). If you would rather buy everything in one go — carriage + power source + wire feeder + torch — say so in your inquiry and we will quote the complete set.
What is the difference between the ZG straight-rail and the RG flexible-track carriage?
ZG uses a rigid SGR20 precision linear rail with gear drive — it is the long-seam machine for flat plate, panels and box beams, where straightness over several metres matters. RG uses a flexible belt track that follows a curved shell, so it is the choice for tanks and vessels. Many fabricators keep both.
How long a seam can one set of track cover?
Each C-type straight rail is 1960 mm long and weighs 9 kg. Rails join through a quick-connect plate in about 10 seconds each, and can be linked to cover seams of any length — you move the rear rail forward as the carriage passes, so a two-rail set handles an unlimited seam.
Can it weld aluminium or stainless steel?
The magnetic track fixing needs magnetically permeable steel. For stainless or aluminium plate, specify suction-cup fixing instead of magnetic bases; the carriage and oscillator themselves are unaffected by the workpiece material. Confirm your material when requesting a quotation.
Is it compatible with my existing MIG welder?
Yes. The carriage works with your current power source, wire feeder and torch — it takes over the trigger through a two-pin ignition control lead and needs no additional investment in welding equipment. DC 24 V low-voltage operation keeps the carriage itself safe to handle.
What torch sizes does it accept?
The universal torch fixture clamps Ø18–25 mm — equivalent to the nozzle outer diameter of 200 A to 500 A torches. Torch position is adjusted by knob handles, vertically 65 mm and horizontally 90 mm, with ±60° oscillator rotation and ±25° torch travel angle.
Where It Works

Applications for the ZG Series Straight Rail

Machines are specified by weld type and workpiece, not by catalogue page. See how this series is used in real fabrication work:

Storage Tank WeldingShell long seams, vertical seams, circumferential seams and tank roofs. Shipbuilding WeldingHull and deck panel long seams, vertical and horizontal butt seams. Steel Structure WeldingFillet welds on H-beams, box beams, columns and frames. Boiler WeldingDrum circumferential seams, tube panels and header welds.

Welding Long Flat Seams Every Day?

One carriage pays for itself quickly. Send us your seam length and plate thickness for a recommendation.

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