Gas Cutting Products — Portable Multi-Purpose Carriage
Welding and Cutting Carriage | UNITRACK-45K Portable Multi-Purpose Tractor
A 12.5 kg rail-guided tractor that turns a hand torch into a machine cut: straight lines, circles and bevels in plate up to 150 mm by oxy-fuel, faster cuts by plasma, and steady MIG welds on the same carriage.
Model: UNITRACK-45K · Oxy-fuel · Plasma · MIG welding · 220 V single phase
Up to 150 mm
Cutting thickness
50–4500 mm/min
Cutting speed, stepless
Ø 200–2000 mm
Circle cutting
Overview
The UNITRACK-45K is a portable welding and cutting carriage — a motorised tractor that runs on a guide rail and carries a torch at a constant speed. It does the job of a pug cutter and a good deal more. Change the torch set and the same carriage does plasma cutting at higher speed, or carries a MIG torch for long, even welds. It is the first step into cutting and welding automation for a fabrication shop: no programming, no table, and it is carried to the plate by one person.
The body is high-strength aluminium, the key parts are copper, and there is no reduction gear in the drive — a double-cone stepless system gives smooth speed changes and holds the set speed under the heat and voltage fluctuations of a real shop floor. Straight cuts run the length of the 1.8 m rail (add rails for longer plate); the circular attachment cuts rings and holes across the 200–2000 mm range diameter; the torch tilts up to 45° for bevels.
Who buys it: fabricators who cut plate by hand today and want straight, square-edged cuts without grinding; shops preparing weld bevels on thick plate; and anyone welding long seams who wants the travel speed taken off the operator. For a dedicated oxy-fuel pug cutter see the CPG-NM pug cutting machine; for template-guided profile cutting see the WING1800 profile gas cutting machine; for pipe cutting and bevelling see the TUBOCUT pipe cutting machine; for programmed shapes step up to the DynaCut ProX portable CNC plasma cutting machine.
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Oxy-fuel, plasma or MIG
One carriage, three jobs — swap the torch set
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Stepless drive
Double-cone drive, no gearbox, no backlash, constant speed
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Built for heat
Aluminium body, copper key parts, heat-resistant grease
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Carries 50 kg
Torch, hoses and attachments ride on the carriage, not on the operator
What is the UNITRACK-45K and how does it work?
It is a self-propelled tractor for a torch. A DC motor (110 V, 30 W, 4200 r/min) drives the wheels through a double-cone stepless mechanism; a silicon-controlled circuit lets the operator dial travel speed anywhere from 50 to 4500 mm/min for cutting or 50 to 1800 mm/min for welding. The carriage rides on a rigid guide rail so the torch path is straight regardless of the plate surface, and a quick-clamp universal holder takes oxy-fuel, plasma or MIG torches with horizontal and vertical adjustment.
Controls are on the top of the machine: a start/stop lever, forward/reverse switch, variable-speed dial and an interface switch for the counter. For circles the rail is replaced by the circular cutting attachment, which pivots the carriage around a centre point. Because the torch is separate from the drive, the cutting or welding power source is whatever you already own — the carriage only moves it.
To run it you need a 220 V single-phase socket, a guide rail laid on the plate, and your existing torch and gas or plasma supply. Set the speed for the plate thickness, clamp the torch, light up and engage the drive.
Why fabricators choose the UNITRACK-45K
Machine-straight cuts without a machine shop
Constant speed on a rail gives a square, dross-free edge that usually goes straight to welding without grinding.
Lower gas and consumable cost
A steady travel speed burns the right amount of gas for the thickness — no slow spots that overheat and waste oxygen.
Works with the torches you own
Oxy-fuel, plasma or MIG — the carriage adds automation to your existing equipment instead of replacing it.
Less operator fatigue, more repeatable quality
Long bevels and seams come out the same from the first metre to the last, whoever is on the job.
Key features
Double-cone stepless drive
Smooth speed transitions and micro-adjustment with no gear backlash, noise or vibration.
Quick-clamp universal torch holder
Takes oxy-fuel, plasma and MIG torches; horizontal and vertical adjustment.
Bevel up to 45°
Groove angle 0–45° for weld preparation on thick plate; welds on inclined surfaces up to 45° too.
Circle cutting attachment
Rings and holes across the 200–2000 mm range diameter without a template.
Rigid 1.8 m guide rail
Standard rail length 1.8 m; join rails for longer straight cuts.
Heat- and voltage-tolerant
Heat-resistant grease, high-temperature soldering and minimal electronics for long continuous running.
UNITRACK-45K technical specifications
| Specification |
UNITRACK-45K |
| Power source |
AC 220 V ±10%, single phase, 50/60 Hz |
| Speed control |
Silicon controlled, stepless |
| Cutting speed |
50–4500 mm/min |
| Welding speed |
50–1800 mm/min |
| Cutting thickness |
Up to 150 mm |
| Groove (bevel) angle |
0–45° |
| Diameter of cutting circle |
Ø 200–2000 mm |
| Motor |
DC 110 V, 30 W, 4200 r/min |
| Guide rail standard length |
1.8 m |
| Maximum loading weight |
50 kg |
| Dimensions |
435 × 220 × 240 mm |
| Weight |
12.5 kg |
Consumables and compatibility
Oxy-fuel: the carriage ships with a machine cutting torch and nozzles for acetylene (G02 series) and propane / LPG (G03 series), sizes 1, 2 and 3 to match plate thickness. Nozzles are the only regular consumable.
Plasma: mounts your plasma machine’s torch in the universal holder; plasma consumables belong to that power source. Our technical team can pair it with a FINELINE plasma unit sized for your plate.
MIG: the MIG torch holder set carries a standard air-cooled MIG torch for mechanised welding at 50–1800 mm/min; wire and gas come from your existing MIG welder.
How to use the UNITRACK-45K
1
Lay the rail. Place the guide rail on the plate parallel to the cut line and set the carriage on it. For circles, fit the circular attachment and set the centre.
2
Mount the torch. Clamp the oxy-fuel, plasma or MIG torch in the holder, adjust height and horizontal offset, and set the bevel angle if required.
3
Set the speed. Plug into 220 V, choose forward or reverse, and dial the travel speed for the plate thickness and process.
4
Cut or weld. Light the torch or strike the arc, preheat or start the puddle, then move the start/stop lever to engage the drive. Stop the drive before the torch at the end of the run.
Applications and industries
Plate cutting and weld preparation
Straight cuts and V or single bevels on structural plate before welding.
Heavy fabrication and boilers
Thick plate up to 150 mm by oxy-fuel where a CNC table is not available.
Flanges and rings
Circle cutting across the 200–2000 mm range without templates.
Shipbuilding and site work
Carried to the plate or the structure; runs on a rail laid where the cut is.
Mechanised MIG welding
Long fillet and butt seams on beams, tanks and panels with a constant travel speed.
Scrap and dismantling
Fast, repeatable cuts through heavy sections with less operator exposure.
What’s in the box
- UNITRACK-45K carriage with quick-clamp torch holder
- Circle cutting attachment (1 set)
- Guide rail, 1.8 m (two convex-slot rails or one groove rail, as ordered)
- Machine cutting torch with nozzles: G02 series 1#, 2#, 3# (acetylene) and G03 series 1#, 2#, 3# (propane / LPG)
- Inlet connectors and pressure caps (2 pairs), ball-head screws M4 (2)
- Power cord, instruction manual and quality certificate
- Plasma and MIG torch holder sets are optional — confirm the configuration with our technical team on WhatsApp before dispatch.
Why buy from Cruxweld
- Indian welding and cutting equipment manufacturer for decades, ISO certified.
- Head office and works in Faridabad, with offices in Mumbai, Bengaluru and Vadodara.
- Rails, wheels, drive parts, torch holders and nozzles held in stock.
- Set-up and operating support from our own technical team on WhatsApp and video call.
- See the full gas cutting machine range or contact the nearest office.
Frequently asked questions
What is the price of the UNITRACK-45K welding and cutting carriage?
The price depends on the rail length and which torch sets you take (oxy-fuel only, or plasma and MIG holders as well). Send your requirement on WhatsApp to +91 88008 82983 and we will send a quotation the same working day.
What thickness can the UNITRACK-45K cut?
With the oxy-fuel torch it cuts carbon steel up to 150 mm thick. In plasma mode the thickness depends on the plasma power source you mount on it.
Can it cut circles and bevels?
Yes. The circle cutting attachment cuts diameters across the 200–2000 mm range, and the torch holder tilts to any groove angle from 0 to 45 degrees for bevelling.
What power supply does it need?
A 220 V single-phase supply at 50/60 Hz with a tolerance of ±10%. The drive motor is only 30 W, so any ordinary workshop socket is enough.
Can the same machine do welding?
Yes. With the MIG torch holder set it carries your MIG torch at a constant 50 to 1800 mm/min for straight seams, including on surfaces inclined up to 45 degrees.
What is the difference between the UNITRACK-45K and the WING1800 profile cutter?
The UNITRACK-45K is a rail tractor for straight lines, circles and bevels. The WING1800 follows a template to cut any profile shape. Choose the UNITRACK-45K for plate preparation and long cuts, the WING1800 for repeated irregular shapes.
How long a cut can it make?
The standard guide rail is 1.8 m; rails join end to end, so the straight cut length is limited only by how many rails you lay.
What is the delivery time and warranty?
Delivery time depends on stock and your location; we confirm it with the quotation. Warranty terms are stated on the quotation and supported by our technical team on WhatsApp and video call.
Still cutting plate by hand?
Tell us your plate thickness and whether you cut with gas or plasma — we will confirm the torch set and send a quotation.
My application is to hard face a high pressure grinding rolls, 750mm diameter and 620mm wide. The weld will be parallel with the shaft,in other words from side to side using flux cored wire on the MIG.
The track will be fixed on a frame and the rolls will be manually rotated to present each subsequent travel until all the surface is covered with weld.
Welding carriage is lesar welding
Welding carriage with oscillation
Could you please send me price and availability and also shipping to the uk. For the mobile cutting machine and track.
Thanks