Technical Guide

Laser Tube Cutting Machine Sample Test: How to Trial Before You Buy (2026)

October 11, 2026

A specification sheet is easy to compare and hard to trust. Two tube lasers with the same 3 kW source cut at different speeds depending on the chuck, the support, the nesting and the parameters somebody typed in. A sample test is the cheap way to find out what a machine does with your parts before you pay for it. Send 5 to 10 parts, get measured samples and cycle times back, then decide.

1. Why a Sample Test Beats a Specification Sheet

Every quote you receive will list the same handful of numbers: power, tube range, positioning accuracy, wall thickness. Those numbers are real, but they describe a machine under ideal conditions, with one material, one wall thickness and one operator.

Your parts are different. Your tube has an ovality from the mill, a seam weld down one side, oil on the surface, and a tolerance that your customer will measure after welding. None of that appears in a brochure.

A laser tube cutting machine sample test costs a few days and, at most, a courier fee. Buying the wrong tube laser costs a year of production and a machine you cannot resell at the price you paid. That is the whole argument.

2. What to Send for a Tube Cutting Sample Test

A laser tube cutting machine sample test needs enough material for the factory to program the part properly, and no more. Do not spend a week packing.

Send this	Why it matters
3 to 10 parts, as 2D drawings or PDFs with tolerances	Tolerance decides power, chuck type and whether the process is viable at all
200-500 mm of each tube material, grade and wall thickness	Shows the ovality, the seam weld and the surface your machine will actually see
One or two full 6 m lengths if you want cycle time data	Nesting, tail scrap and real cutting time cannot be measured on a short offcut
Material certificate or grade (Q235, 304, 6061, galvanised)	Stainless, aluminium and coated tube need different parameters and gas
Batch size and the tolerance that matters most	Hole position, cut length and end squareness are not equally important on every part
The next process after cutting	Welding, powder coating and assembly set the burr and spatter standard

Ask for an NDA before you send drawings. Any factory worth dealing with will sign one, and it tells you something about how they treat the next customer's files too.

3. How the Factory Runs the Trial

A serious trial follows a fixed sequence, and you should ask to see it in the report.

Redraw your part in the factory CAD system and send the drawing back for your written approval.
Nest the parts with the material and the wall thickness you supplied, including the offcut layout.
Set parameters for the material and thickness, not for the brochure.
Cut a first article and measure it before running the rest.
Run 20 to 50 parts and time the run, with the program running unattended where the machine allows it.
Return the samples, the offcut and a written report with photographs or video.

Across the range we build, tube runs from about 15 mm to 500 mm, with carbon steel up to 12-20 mm and stainless up to 6-10 mm at the higher power classes. Your wall thickness and batch size decide which end of that range you should be looking at, which is exactly what a trial is for.

4. What to Measure on the Samples You Get Back

The samples are the deliverable of the laser tube cutting machine sample test, so do not judge them by eye in a photograph. Measure them, or send them to a local inspector and measure them there.

Check	How to check it	What good looks like
Cut length	Vernier or CMM against the drawing	Within the length tolerance quoted, commonly +/-0.1 mm per metre
End squareness	Square and feeler gauge on the cut face	Square enough for your welding fixture, typically within +/-0.5 degrees
Hole and slot position	Measured from a datum you chose, not from the cut end	Consistent from the first part to the twentieth
Burr and dross	Finger, then a deburring tool	Light, removable by hand or a quick brush, not welded on
Kerf and taper	Magnifier or a sectioned sample	Narrow and parallel, no visible taper on the wall you weld
Round tube ovality after cutting	Caliper at three points on the cut end	Springing back inside your assembly tolerance
Tail scrap	Measure the offcut the factory returns	Short and predictable, because tail scrap is money

Write the measured numbers next to the drawing tolerance before you read the quotation. A machine that misses by a little on the sample will miss by more after a year of production.

5. What the Trial Report Should Contain

The written report is the second half of the laser tube cutting machine sample test. Ask for these items in writing, and refuse a report that only says the samples were cut successfully.

Cycle time per part in seconds, from a run of parts, not a single piece.
Power used, cutting speed, gas type and gas pressure for each material.
The program or nesting picture, showing how many parts came off one length.
First article measurement sheet against your drawing tolerances.
Photographs of the cut face and a video with a timecode for the run.
Whether automatic loading was used, and the measured tail scrap length.

The cycle time is the number that decides your payback. Everything else is reassurance.

6. Tube Problems That Only Show Up in a Real Test

Flat sheet hides nothing. Tube hides a lot, and these are the ones that appear on the first real run.

Problem	Cause	What to ask for
Thin wall tube deforms at the chuck	Clamping pressure too high on a wall under about 1 mm	Soft jaws or a lower pressure chuck setting, tested on your material
Seam welded tube cuts unevenly	Hardness difference along the ERW weld line	Parameter set that compensates over the seam, shown in the report
Galvanised tube burns at the edge	Zinc coating and fume	Extraction and a coating thickness you declare in advance
Aluminium or brass cuts poorly	High reflectivity at low power	Higher power class or a different gas mix, proven on a sample
Square tube corners mark or crush	Jaw shape against the corner radius	Chuck review against your actual profile, not a nominal size
Long tube sags or whips	Support spacing and feed speed	Follow-up support layout and its limits in metres
Oil or scale contaminates the cut	Mill surface condition	Sample cut with your tube as delivered, not a cleaned sample

Send tube exactly as it arrives from your supplier. A bright, cleaned sample flatters every machine.

7. What a Sample Test Costs and How Long It Takes

Cutting a few short samples is normally free, and you pay the courier back. A full batch trial with a written report is often a paid service or is credited against the order if you buy.

Three to seven working days is normal for a sample cut, longer if the factory has to redraw complex parts or wait for your material. If a supplier promises a full batch trial in 24 hours, ask who programmed it.

8. How the Trial Turns Into a Quotation

With the measured samples and the cycle time in hand, the machine configuration stops being a guess.

Power: 1.5 to 3 kW covers thin wall furniture, racking and railing tube; 3 to 6 kW covers 4 to 10 mm wall; higher power is for thick wall or high volume.
Chuck and profile: round, square, rectangular or angle, with the jaw type matched to your wall thickness.
Loading: automatic loading in 6 m standard, with 9 m and 12 m as options, and zero tail feed if your offcut cost is real.
Delivery: machine build, pre-shipment inspection, sea freight and the installation and training days included.
Payment: the common structure is a deposit with the balance before shipment, and it is worth asking what the balance buys.

Give us your drawing list and the tube you actually buy. We will run the sample, send the measured numbers with the samples back, and quote the machine that produced them. Write to our team or start with the laser tube cutting machine page for the configuration options.

Frequently Asked Questions

Is a laser tube cutting machine sample test free?

With most Chinese tube laser factories, cutting a few sample parts is free and you pay only the courier to get the samples back. A full trial on your own production batch, with a written report and video, is usually a paid service or is credited against the order. Ask before you send anything, and ask whether the cut samples and the offcut are returned to you, because the offcut shows the tail scrap and the nesting quality.

How long should the tube samples be?

Short pieces are enough for quality. Send 200-500 mm lengths of each material and wall thickness if you only want to check the cut face, hole position and burr. Send one or two full lengths, 6 m is standard, if you also want the real cycle time, the nesting layout and the tail scrap measured on production parts.

What if I do not have 3D drawings?

A 2D drawing with tolerances, a printed PDF or even the welded assembly is enough to start. The factory redraws the part in its own CAD, then sends the drawing back to you for approval before cutting. Approve it in writing, because the program follows that drawing and not your sketch.

How do I know the cycle time in the report is realistic?

Ask for the cutting speed, the gas pressure, the power actually used and a video with a timecode. Compare the cutting speed against the thickness range for that power level, and ask how many parts were cut in the run. One part timed by hand proves nothing, a run of 20 to 50 parts with the program file does.

What happens if the samples do not meet my tolerance?

There are four honest answers: change the parameters and rerun, change the chuck or add a fixture, step up the power, or admit that this process is not right for the part. A supplier who reaches the fourth answer is worth keeping, because the alternative is a machine that never holds your tolerance in your own factory. Read more on our tube laser range page.

Sources and Notes

FANY LASER tube laser specification data (tube range, wall thickness classes, positioning and length accuracy) for the range quoted in this article.
Bodor Laser, Future series tube laser launch, October 9, 2026 (laserfair.com) - integrated cutting and drilling in one setup.
Lonx Laser, K Series tube lasers and X3 sheet laser debut at CIIF 2026, October 13, 2026 (longxinlaser.com).
Aore Laser, V24 enclosure-type high-speed tube laser, October 12-14, 2026 (aorelaser.cn).
TRUMPF, EuroBLECH 2026 laser cutting announcement, October 9, 2026 (trumpf.com) - process monitoring and nozzle condition checking on a production cutting machine.

Written by the FANY LASER team. Serving global industrial buyers since 2018. Connect on LinkedIn