Straight Track Welding Carriage / Welding Tractor | Automatic Long Seam Welding Machine

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 and swing angle 0–30°

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

Item	Specification
Carriage model	ZG-III-Q1/Z (straight swing)
Drive mode	Gear drive (main unit travel)
Welding speed	0–1100 mm/min (digital display)
Minimum suction thickness	3 mm (magnetically permeable material)
Carriage dimensions (L×W×H)	236 × 365 × 230 mm
Carriage weight	7.8 kg
Swing mode	Straight swing
Swing width	0–32 mm (digital, simulated value)
Swing speed	0–2700 mm/min
Dwell time left / right	0–4 s each
Centre offset compensation	±5 mm
Torch adjustment — vertical	65 mm (vertical slide)
Torch adjustment — horizontal	90 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 block	V-type 12 T metal-handle magnetic base, 120 × 50 × 55 mm, 2 kg each, holding force 35 kg per block
Track assembly weight	15 kg; quick-connect joint plate, approx. 10 s to mount one rail
Standard configuration	Carriage ×1 · Straight-swing oscillator ×1 · Type-C straight tracks ×2 · Power unit ×1 · Power cable ×1 · Tool kit ×1 · Documents ×1 · Packaging ×1
Packing	Foam 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-track 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 2 mm, including stainless steel and other non-magnetic plates.

Model	Fixing	Type	Swing
ZG-III-Q1/Z-C	Magnetic	Integrated	Straight swing
ZG-III-Q1/J-C	Magnetic	Integrated	Angle swing
Zg-III-Q1/Z-C	Magnetic	Split	Straight swing
Zg-III-Q1/J-C	Magnetic	Split	Angle swing
ZG-III-Q1/Z-X	Suction	Integrated	Straight swing
ZG-III-Q1/J-X	Suction	Integrated	Angle swing
Zg-III-Q1/Z-X	Suction	Split	Straight swing
Zg-III-Q1/J-X	Suction	Split	Angle swing

FAQ

Questions Engineers Ask About This Machine

What is the difference between the ZG straight-track 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 Track

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.

Straight-Track Welding Carriage — ZG Series