Key takeaways
- A turret punch makes a 6 mm hole in 1.5 mm CRCA in 0.3 s and a 12 kW fibre laser takes 0.5 s, so the turret is only 1.7 times faster per feature, not the five times usually claimed.
- Nibbling an outline at 0.4 m/min against a laser at 7 m/min means the turret loses 140 s for every metre of contour it has to cut itself.
- On a 1.5 mm perforated door with 800 holes, punching takes 4.0 min and 0.33 kWh, the laser 7.3 min and 2.66 kWh; the tool, not the machine, decides whether that matters.
- Above four distinct hole sizes on one part number, the turret's station changes and tool changes start to cost more than the laser time it saves.
- Neither machine is the cheapest route above roughly 5,000 parts a year; a progressive tool punches the same panel in a fraction of one hit cycle.
A 1.5 mm CRCA electrical door with 800 holes of Ø6 mm takes 4 minutes on a turret punch and 7.3 minutes on a 12 kW fibre laser. The turret is nearly twice as fast, uses an eighth of the electrical energy, and leaves an edge with no oxide on it. It is also the wrong machine for that door in most shops, because the turret cannot cut the door's outline at anything close to a competitive speed.
That contradiction is the whole decision. A turret punch is a machine that makes features at high speed and cuts outlines slowly. A fibre laser is the reverse. Comparing them on cutting speed alone produces the wrong answer roughly half the time, which is why so many enquiries arrive asking the wrong question.
The numbers below show where each machine earns its place, the arithmetic behind the crossover, and the point where a punch press tool beats both. The stamping and press shop hub covers the press side in more depth.
Turret punching versus laser cutting: which one for one part?
The turret wins when the part carries many identical features, needs a formed feature, and has an outline that a shear or a rectangular punch can produce. The laser wins when the outline is a contour, when the hole count is low, when the part is thicker than 4 mm, or when the revision changes hole sizes.
Everything else is arithmetic on two numbers: the time per feature and the time per metre of contour. A turret makes a 6 mm hole in 1.5 mm CRCA in about 0.3 s including table movement. A 12 kW laser pierces, cuts 18.8 mm of circumference and moves on in about 0.5 s. That is a 1.7 times advantage for the turret, and it is much smaller than the folklore suggests.
On the contour the ratio inverts. A laser cuts 1.5 mm mild steel at 6–8 m/min, so a metre of outline is 8–10 s. A turret nibbling the same line with a small round tool works at 0.3–0.6 m/min, which is 100–200 s per metre. The turret loses 140 s for every metre of contour it has to make itself.
The two machines on the numbers
The table gives typical values for 1.5 mm CRCA on production equipment. The Ganesh column says what is actually available in our plant, because a comparison against a machine a supplier does not own is a comparison against a catalogue.
| Criterion | Turret punch | Fibre laser | Ganesh limit or note |
|---|---|---|---|
| Time per Ø6 hole in 1.5 mm | 0.25–0.35 s including table move | 0.45–0.60 s including pierce | Laser runs 0.5 s per hole on the 12 kW source |
| Cutting speed on 1.5 mm outline | 0.3–0.6 m/min nibbling | 6–8 m/min | Laser is the outline machine |
| Maximum thickness | 6–8 mm for a 20–30 T station | 20 mm plate | 20 mm on the laser; 30–40 mm on the iron worker by shear |
| Hole-to-thickness minimum | About 1 × t for round, 1.5 × t to design | Roughly the kerf, 0.2–0.3 mm | Both far below anything a drawing normally asks for |
| Edge condition | Shear, rollover 10–15% of t, burr 0.05–0.15 mm | Narrow heat-affected zone, oxide on oxygen-cut steel | Laser edges are blasted before coating |
| Formed features in one hit | Louvres, bridges, countersinks, collars, taps | None | Formed features need a punch press or a secondary operation |
| Tooling per hole size | One punch and die set per size, 2–6 h of tool room time | None, a program change | Tool room is in-house, quoted separately from piece price |
| Station capacity | 20–60 stations in the library | Unlimited feature count | Not applicable: we punch on a 250 T press with dedicated tools |
| Sheet size | 1,250 × 2,500 mm with repositioning | 40 ft × 16 ft bed | Largest bed in the plant |
| Energy per hour of running | 4–6 kW average draw | 22–25 kW at the wall | Ratio decides the running-energy question |
Two lines in that table are the ones buyers ask about. The first is energy: at 5 kW against 23 kW, the laser draws four to five times more while it runs, which is why the turret's advantage in the worked example below is eight times rather than two. The second is the station capacity, because it is what makes a turret a mixed-production machine: 40 stations means 40 hole sizes available without a tool change, and a shop with three turrets has 120.
The perforated door worked both ways
Take a 1.5 mm CRCA door, 1,196 × 596 mm, with 800 holes of Ø6 mm on a 25 mm pitch in a 1,000 × 500 mm field. The outline is a rectangle with four 6 mm corner radii, so both machines can make it and the comparison is fair.
On the laser the outline is 3,384 mm at 120 mm/s, which is 28 s. Each hole is a 0.25 s pierce, 0.16 s of circumference at 120 mm/s and 0.10 s of rapid, so 0.51 s, and 800 of them take 408 s. Total 436 s, or 7.3 min, at 22 kW, which is 2.66 kWh.
On the turret the same door is punched from a sheared blank, because the outline is already square. Each hole is 0.30 s including the table move, so 800 hits take 240 s. Add 20 s for the tool change and the blank load, and the door takes 4.3 min at 5 kW average draw, which is 0.36 kWh.
The laser burns 2.30 kWh more per door. Across 5,000 doors that is 11,500 kWh, and at 0.71 kgCO2e per kWh it is 8.2 tonnes of CO2 for an edge and an outline the part does not need. It also ties up 250 machine-hours of laser time that could be cutting parts with contours while the turret sits idle.
What breaks the turret case
Three things do, and any one of them is enough.
The outline stops being rectangular. Add a 40 mm notch or a 30° chamfer and the turret has to nibble it, which adds 60–150 s per feature at 0.4 m/min. A laser adds 3 s. Two such features on a door wipe out the turret's 3-minute advantage.
The hole count drops. Cut the pattern to 60 holes and the turret saves 60 × 0.21 s = 12.6 s while the laser saves 28 s of outline plus the blank handling. The crossover on this door geometry lands near 130 holes: above that the punch time saved exceeds the extra outline time, below it the laser wins.
The hole sizes multiply. Eight sizes need eight stations and eight tools, and every revision that changes a size needs a tool made. A laser needs a new program, which the programmer writes in the time it takes to check the drawing.
Which side of the hole is the size
A punched hole is not a cylinder. The punch enters, shears roughly a third of the thickness, fractures the rest, and leaves a rollover on the punch side and a burr on the die side. The entry measures 0.05–0.15 mm larger than the exit, so a nominal Ø6.0 mm hole is about Ø6.05 at entry and Ø5.95 at exit. A drawing that calls up Ø6.0 ±0.10 mm and does not say which face is the datum will produce an argument at goods-in between a plug gauge and a calliper.
A laser-cut hole tapers the other way and by less: 0.02–0.05 mm per side in 1.5 mm mild steel, with the exit slightly tighter on oxygen-cut material. It also has a pierce mark on the entry face, which matters on a visible panel but not on a bracket.
The specification that survives both routes is a hole size with an explicit reference face, a positional tolerance from a single datum, and a burr limit rather than a finish description. Laser cutting tolerances for OEM parts gives the laser numbers to compare against.
Where the turret is still the right machine
Three cases survive the arithmetic.
Formed features. A louvre, a bridge, a countersink, an extruded collar or a tapped hole is made in one hit by a tool. No laser produces any of them, and moving them to a secondary press or a tapping station adds a handling step and a dimension chain. A genset canopy louvre panel or a rack door with formed stiffeners is a punch job.
Very high hole density in thin material. At 0.8 mm the laser's pierce time becomes significant relative to the cut, and the turret's hit rate holds. A speaker grille, a filter panel or a ventilation field with hundreds of small holes per square metre is punch territory if a tool exists.
Square, oxide-free edges going straight to paint. A punched edge has a small rollover and a burr, but no oxide and no heat-affected zone. On a part that will be powder coated without blasting, that saves a process step, which is often worth more than the cycle time. Our seven-tank pretreatment handles both edges, but the laser edge needs the blasting stage first on thick material.
Where the laser is the only sensible machine
The laser wins on every contour, every one-off, every part with more than a handful of hole sizes, and everything above 4 mm.
It also wins on revision churn. A prototype that changes twice a week cannot wait for tools, and the same is true of a product with 40 variants that differ only in hole patterns. A laser handles that with 40 programs and no tooling inventory.
Thickness settles the rest. Above 6 mm a turret's station tonnage becomes the limit and tool life falls away, while the laser keeps cutting to 20 mm. Laser cutting holes, slots and small features covers what the laser can hold in thin sheet, which is tighter than most drawings ask for.
What we run, and why the route looks different here
Ganesh does not run a turret punch with a resident tool library. Our punching capacity is a 250 T punching press working with dedicated tools, built in the in-house tool room alongside the progressive dies, welding fixtures and checking fixtures. That is a turret's feature economics without its flexibility: the tool is made for the part, so the hit is as fast, but the tool has to be justified by volume rather than shared across 40 jobs.
Outlines and one-offs run on the 12 kW fibre laser with its 40 ft × 16 ft bed, backed by two 6 kW and two 3 kW machines, in mild steel, CRCA, stainless, aluminium, brass and copper to 20 mm. Plate work to 30–40 mm is sheared and punched on the iron worker rather than cut. Typical tolerance is ±0.5 mm, tighter on critical features by agreement, with first article inspection and PPAP available.
That combination means the answer to "should this be punched or cut" is usually a route question rather than a machine question: which features justify a tool, and which pass through the laser on the way to a bend. The press shop capability page lists the press range and the tool room scope.
When neither machine is the answer
Above a certain annual quantity both machines lose to a press tool. A progressive die punches the door's 800 holes in one stroke while the strip indexes, and the cycle drops to a few seconds per part. Our comparison of laser cutting and stamping sets out the volume crossover; for a large perforated panel it arrives earlier than for a bracket, because the punching time saved per part is so much larger.
Below the crossover, neither machine is right for a part with two holes and a 4 m outline, which belongs on a shear and a brake with the holes drilled. And a part above 20 mm plate is outside the laser envelope entirely; that is a shear-and-machine job or a plate process we do not run.
What to put on the drawing
Five fields settle the route before anyone programs a nest.
- Material, grade and thickness, with the thickness tolerance if the part punches.
- Hole schedule: size, quantity per size, and positional tolerance from a single datum.
- Formed features, marked as formed rather than cut, with their height and angle.
- Outline geometry, and whether the corners may be square or must carry a radius.
- Edge requirement, stated as burr limit and whether oxide is acceptable before coating.
Add the annual quantity and the expected number of revisions. Those two numbers decide whether a tool is worth building, and they are the two that drawings never carry. Send the current revision and the quantity through the quote request and we will come back with the route, the tooling position and the inspection plan for whichever machine the part belongs on.
Frequently asked questions
Is turret punching faster than laser cutting?
Only feature for feature. A turret puts a 6 mm hole in 1.5 mm steel in about 0.3 s; a laser pierces, cuts the circumference and moves on in about 0.5 s. On the outline the laser is 15–20 times faster, because it cuts at 7 m/min where a nibbling turret works at 0.4 m/min.
Can a fibre laser replace a turret punch completely?
For outlines and one-off work, yes. For formed features, no: louvres, bridges, countersinks, tapped holes and extruded collars are made by a tool in one hit, and a laser can only cut a flat shape. A part that needs those features needs a punch press or a secondary operation.
What is the minimum hole a turret punch can make?
About 1 × thickness for a round punch in mild steel, and 1.5 × thickness is the safer design rule. Below that the punch shank gets too slender for the load and snaps. A laser cuts a hole of roughly its own kerf, about 0.2 mm, in any thickness it can pierce.
Why does a turret need so many stations?
Every hole size and shape needs its own punch and die held in a station, and a typical machine has 20–60. A part with 12 hole sizes occupies 12 stations for the whole run, so the library, not the tonnage, is what limits a mixed-production turret shop.
Does punching leave a better edge than laser cutting?
It leaves a different edge. Punching shears the metal cleanly with a small rollover and a burr of 0.05–0.15 mm, and no oxide. A laser leaves a narrow heat-affected zone and, on oxygen-cut mild steel, an oxide film that has to come off before powder coating.
When should a part move from either machine to a press tool?
When the annual quantity is high enough that tooling is no longer the largest line in the quote. For a small bracket that is often 5,000–10,000 parts a year; for a large perforated panel it can be lower because the punch cycle saves so much machine time.
Sources and further reading
- ISO 9013:2017 — Thermal cutting: classification of thermal cuts, covering laser, plasma and oxy-fuel cut edge quality classes · reviewed 3 Nov 2026
- IS 513 — Cold reduced carbon steel sheets and strips, the substrate behind most punched and laser-cut panels · reviewed 3 Nov 2026
- ISO 2768-1 — General tolerances for linear and angular dimensions without individual tolerance indications · reviewed 3 Nov 2026
Have a perforated panel that needs a route?
Send the drawing with hole sizes, hole count, thickness and annual quantity. We will compare the laser, a dedicated punch tool and a progressive tool on setup, cycle and inspection.
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