A high-elastic stainless-steel belt track with magnetic blocks that clings to curved shells and large-diameter workpieces — weld vertical, horizontal and circumferential seams on tanks from Ø2000 mm upward.
Also known as: flexible track welding carriage, flexible-track welding tractor, rail welding carriage for curved seams.




Purpose-built for tank and shell work: the belt track is held by strong magnetic adsorption on carbon steel plate from 3 mm — inside or outside the tank, welding horizontal, vertical and flat-position long straight seams on shells from Ø1800 mm upward.
| Item | Specification |
|---|---|
| Carriage model | RG-III-Q1/Z (straight swing) · RG-III-Q1/J (angle swing) |
| Drive mode | Chain-sprocket drive (main unit travel) |
| Welding speed | 0–1100 mm/min (digital display) |
| Minimum workpiece diameter | Ø1800 mm and above (magnetically permeable material) |
| Minimum suction thickness | 3 mm |
| Carriage dimensions (L×W×H) | RG-III-Q1/Z: 240 × 365 × 302 mm · RG-III-Q1/J: 260 × 503 × 302 mm |
| Carriage weight | 8.7 kg |
| Swing mode | Straight swing (Z) / angle swing (J) |
| Swing width | 0–32 mm (digital, simulated value) |
| Swing angle | 30° (angle-swing version) |
| 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° |
| Flexible track (type C) | Custom stainless steel belt, 1784 × 102 × 2 mm, 2 kg per rail |
| Magnetic block | V-type 12 T metal-handle magnetic base, 120 × 50 × 55 mm, 2 kg each, holding force 35 kg per block (room temperature, thick plate, vertical) |
| Track assembly weight | 10 kg; quick-plug joint, approx. 15 s to mount one rail |
| Standard configuration | Carriage ×1 · Type-C flexible tracks ×2 · Power unit ×1 · Power cable ×1 · Tool kit ×1 · Documents ×1 · Packaging ×1 |
| Packing | Foam packing 1850 × 140 × 30 mm, 5 kg · Wooden case 510 × 410 × 420 mm, 40 kg |
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: RG-III-Q1 = flexible-track magnetic · RG-III-Q1/Z-B, /J-B = clamping type · "Z" = straight swing, "J" = angle swing · first letter uppercase = integrated type, lowercase = split type.
How to choose the fixing: "/C" magnetic — tanks from ∅1800 mm, carbon steel, welding inside and outside the shell. "/B" clamping — smaller tanks ∅700–2000 mm, stainless or carbon steel, welding on the outside of the shell. "/X" vacuum-suction — for stainless and other non-magnetic shells from ∅1800 mm.
| Model | Track | Type | Swing |
|---|---|---|---|
| RG-III-Q1/Z-C | Magnetic | Integrated | Straight swing |
| RG-III-Q1/J-C | Magnetic | Integrated | Angle swing |
| Rg-III-Q1/Z-C | Magnetic | Split | Straight swing |
| Rg-III-Q1/J-C | Magnetic | Split | Angle swing |
| RG-III-Q1/Z-X | Suction | Integrated | Straight swing |
| RG-III-Q1/J-X | Suction | Integrated | Angle swing |
| Rg-III-Q1/Z-X | Suction | Split | Straight swing |
| Rg-III-Q1/J-X | Suction | Split | Angle swing |
| RG-III-Q1/Z-B | Clamping | Integrated | Straight swing |
| RG-III-Q1/J-B | Clamping | Integrated | Angle swing |
| Rg-III-Q1/Z-B | Clamping | Split | Straight swing |
| Rg-III-Q1/J-B | Clamping | Split | Angle swing |
Machines are specified by weld type and workpiece, not by catalogue page. See how this series is used in real fabrication work:
Tell us the diameter and plate thickness — we'll confirm the right track type and send you a direct quotation.