Laser Tube Cutting Machine

A laser tube cutting machine is a fiber laser machine built around pneumatic self auto-centering chucks rather than a flat bed. The chuck grips and rotates the section under the cutting head while the head travels along its length, so the beam can reach any face and any angle of the profile in one setup – cutting to length, mitring, notching, coping, slotting and drilling in a single program. Sigma Mechotronics Pvt. Ltd. builds it from 1.5 kW to 12 kW, with maximum chuck diameters from 20 Ø to 350 Ø across two chuck models, for 3 metre and 6 metre stock, holding ±0.05 mm re-positioning accuracy.

Maximum chuck diameters run from 20 Ø to 350 Ø across two chuck models that cover different parts of that range between them, so round and square tube from 20 mm to 350 mm and rectangular tube up to 350 mm on its longest side. Beyond closed tube it also cuts open sections – C, H, L and I profile – plus special sections. Because of the two chuck models, the right question is not only how large your biggest section is but how small your smallest one is: send us both ends of your section list and we will confirm which model suits your work, and send a profile drawing for any special section.

3 metre and 6 metre lengths, matching the lengths tube and pipe are normally supplied in, so bar can be loaded as received rather than cut down first. The working router along the bar is 6050 mm. Choose the option that matches your incoming stock, and remember that a 6 metre machine needs clear infeed and outfeed space along its whole run, well beyond the machine’s own footprint.

Power follows wall thickness and the speed you need, not section diameter – a large thin-wall tube is an easier cut than a small heavy-wall one. Broadly, 1.5 kW to 3 kW suits thin-wall tube and light section such as railing and furniture work, 4 kW to 6 kW covers the general production middle across structural tube, pipe and open channel, and 8 kW to 12 kW is for heavy-wall section and high-volume production. One thing worth understanding: on a closed section the beam that passes through the near wall reaches the opposite inner wall, so power on tube is a different judgement from power on plate and the top of the band is not automatically the safer choice. Confirm your specific sections with our applications team before you fix it.

It lets the head cut at an angle to the section face rather than square to it, through ±45°. That produces weld preparation – the angled edge needed for full penetration on thicker-wall joints – and mitred ends for corner joints, directly on the machine instead of at a grinder afterwards. Beyond the time saved, a cut bevel is identical on every part, so weld penetration stays consistent across a batch rather than varying with whoever prepared the edge. Send us an assembly drawing and we will confirm the bevel angle achievable on your specific wall thickness and section.

Re-positioning accuracy is ±0.05 mm. In practice that is what lets every feature on a bar – holes, slots, notches, copes and the cut length itself – be placed from a single datum, so a frame with dozens of joints assembles square without a jig correcting it. Two things decide whether you actually see that on the part: the machine’s automatic deformation correction, which compensates for bow and twist in the incoming bar, and the quality of the tube you buy, since badly out-of-round or heavily bowed stock limits what any machine can deliver.

It means the feed system works the bar through to the end instead of leaving a gripped remnant behind in the chuck. On a tube machine that end-of-bar offcut is a cost you pay on every bar, not once – and it is the specification most buyers never think to ask a supplier about. Over a year of production it is a real line in your material spend, and it is one of the reasons matching the machine’s length option to your supplied stock length matters as much as it does.

Mill-supplied tube is never perfectly straight or perfectly round – there is always some bow along the length, some twist, and some ovality in the section. The machine compensates for that as the bar feeds rather than transferring it into the cut. Without correction, a bent bar puts every feature slightly off position and the ±0.05 mm the machine is capable of never reaches the finished part. It does not turn bad stock into good stock, but it removes the most common practical reason a tube laser underperforms its specification.

Yes, as an option specified with the machine. Whether you need it depends on your shift pattern rather than your volume alone: on single-shift job work with mixed sections, manual loading combined with the machine’s fast tube change is usually sufficient. On multi-shift or repeat-batch production, loading becomes the constraint long before the laser does. Decide it at order stage – automatic loading needs its own floor space, and retro-fitting it to a line already built around manual loading is a much bigger job.

No. This machine is dedicated to tube, pipe and profile stock – the chuck-and-feed system is what gives it the section capability, and it replaces the flat bed rather than sitting alongside one. If your drawings contain flat parts as well as section, tell us at the inquiry stage and we will go through the options in our cutting range with you.

Mild and carbon steel, stainless steel and aluminium sections are the core materials. Brass and copper are highly reflective at the 1064 nm fiber wavelength, so a back-reflection protected cutting head should be confirmed if you run them regularly. Titanium is a separate case – it cuts cleanly but needs inert gas shielding to avoid an oxidised, embrittled edge, so tell us if it is part of your work. Fiber laser is not the correct cutting technology for plastics, rubber, wood, leather or glass.

Considerably more than the machine body, and the requirement is length rather than area. The working router runs to 6050 mm along the bar, and on top of that you need clear infeed to load a full bar, clear outfeed for finished parts, the demarcated safety zone along the run, a staging area for bar stock, plus the control cabinet, chiller and extraction ducting – and the auto loading system if you specify it. We confirm the exact footprint and clearance against your shop drawing during the pre-order consultation, since it varies with the 3 metre or 6 metre option.

Automatic lubrication services the feed system on schedule without operator intervention, which minimises wear and removes a manual routine that is easy to skip on a busy shift – but the system itself still needs its reservoir level and delivery checked monthly. Beyond that, the routine that matters most is the chuck and the feed run: chuck jaws need weekly inspection and cleaning, because worn or dirty jaws let the section slip and slip becomes position error, and swarf and offcuts have to be cleared along the feed run daily on multi-shift production. Add lens and nozzle checks daily to weekly, pneumatic supply and air quality weekly, extraction and cooling checks weekly, and a full technical inspection with accuracy verification annually.

There is no single price, because the machine is configured to your work. The laser power you specify between 1.5 kW and 12 kW is the largest single factor, followed by the chuck model and the 3 metre or 6 metre length option, then whether automatic loading and unloading is included, then the supporting equipment specified around the machine. A 1.5 kW machine on the smaller chuck for 3 metre stock and a 12 kW machine on the larger chuck for 6 metre stock with auto loading sit at very different points in the same range. We quote against a confirmed specification rather than publishing a fixed figure, because an incorrectly specified machine is a poor investment at any price. Send your section list, wall thickness, material and stock length on WhatsApp or call +91 99090 26467 and we will send a detailed quotation.

Come and see it. Sigma Mechotronics Pvt. Ltd. builds these machines at its own plant at Plot No. 58-59-60, Gopal Charan Industrial Hub, Bakrol, Ahmedabad, and facility visits are welcome by appointment – a trader cannot show you a machine part-built on the floor. Beyond the visit, ask us for the company registration, GST and MSME papers, the ISO and CE certification and the written warranty scope, and ask to speak to the service team rather than only to sales about who attends a breakdown and which spares are held in India. Those are the questions worth putting to every supplier you are comparing, not only to us.

A 2 years warranty covering manufacturing defects in the machine body, laser delivery system, control electronics, motion system and the chuck and feed mechanism, handled directly by Sigma Mechotronics Pvt. Ltd. rather than through an agent or overseas supplier. Installation and commissioning at your premises, cutting parameter setting for your material, and operator training on chuck setup, bevel programming and section handling are part of the supply, and spares are held in India. Every purchase comes with a GST tax invoice under your GSTIN.

Yes, and on this machine we particularly recommend bringing your actual sections rather than a similar size, since shape, wall thickness and how the profile clamps are what decide the result. If you have an assembly with notched or bevelled joints, bring that drawing too – a trial on your own material and geometry is the most reliable way to confirm the machine meets your specification before committing capital. Facility visits to our Ahmedabad plant are welcome by appointment.