Two suppliers quote the same 2 mm cold-rolled steel enclosure panel 30% apart, with nothing different on the drawing. The difference is almost always the routing: one shop lasers every part, the other punches it. Knowing which process belongs on your part tells you whether a quote is genuinely competitive, and which design changes will actually move the price.
The short answer
- Prototypes, one-offs, low volume: fiber laser, always. No tooling, no set-up, nothing to think about.
- Few holes, any volume: fiber laser. A part with under about 10 holes gives the punch nothing to gain.
- High hole density or perforated patterns: turret punching, from roughly 500 pieces up for 30–100 holes per part, and from as low as 100–200 pieces for vent panels with hundreds of openings.
- Formed features in the same pass — louvers, extruded holes, knockouts, lance-and-form bridges — turret punching, even at moderate volume, because it removes an entire secondary operation.
How the two processes actually differ
The distinction is not "old versus new". It is what drives cycle time. A fiber laser follows a programmed path and cuts by melting and blowing material away, so cycle time is a function of cut length. A 100 mm profile costs the same whether it contains one hole or none — the tool has no interest in geometry, only in how far it travels. A turret punch hits the sheet with a die, so cycle time is a function of hit count: one 3 mm hole is a single hit of perhaps a quarter second, while the laser needs a full circular path plus a pierce. That one fact explains nearly every routing decision in a sheet metal shop.
| Factor | Fiber laser | Turret punch |
|---|---|---|
| Cycle time driven by | Cut length, thickness, pierce count | Hit count, index time, travel |
| Tooling | None — geometry is free | Library tools free; custom is chargeable |
| Practical thickness | 0.5–25 mm, by laser power | 0.5–6.35 mm standard tooling |
| Minimum hole diameter | About 0.5 × t, or 1.0 mm | About 1.0 × t |
| Cut edge | Kerf 0.1–0.3 mm, narrow HAZ, light dross | Sheared: rollover one side, burr on the other |
| Formed features in one pass | No — needs secondary press work | Yes — louvers, bridges, knockouts |
| Material yield | 80–90% with true-shape nesting | 70–80%, rectangular nesting plus skeleton |
| Cost driver | Assist gas, especially nitrogen on stainless | Tool sharpening and replacement |
Where the cost actually sits
Comparing machine hourly rates is the least useful exercise in the room. What matters is how each process accumulates cost across your order quantity.
Laser cost structure
- No tooling charge. A new geometry costs programming time only — typically 15–45 minutes — so design revisions during prototyping are close to free.
- Assist gas. Oxygen on carbon steel is cheap; nitrogen at 15–20 bar on stainless and aluminium can dominate the cutting cost of a thin part.
- Pierce time. A part with 200 small holes pays 200 pierces — exactly the weakness that punching exploits.
Turret cost structure
- Tooling. Standard rounds, squares and obrounds sit in every shop's library. Cluster, forming and special tools cost roughly USD 150–800 each.
- Set-up and index time. A tool change costs seconds, but a part needing 12 tools pays 12 index changes per sheet — set-up amortises over the sheet, not the order.
- Skeleton waste. Parts nest in rectangles, so yield runs 5–10 percentage points below laser; on a large stainless programme that gap can exceed the punching saving.
The volume crossover, in numbers
No universal break-even quantity exists, because it depends on hole count, tool availability and material price on the day. These bands hold well in practice for 1–3 mm cold-rolled steel:
| Part profile | Quantity where punching starts to win | Why |
|---|---|---|
| 1–10 holes, simple outline | Rarely — laser stays competitive at any volume | Too few hits to repay the set-up |
| 10–30 holes | About 2,000–5,000 pieces | Hit advantage exists but is modest per part |
| 30–100 holes, standard tools | About 500–1,000 pieces | Pierce and path time dominate the laser |
| 100+ holes or perforated pattern | About 100–300 pieces | Laser time becomes uncompetitive fast |
| Formed feature required | Any volume, if it removes a secondary operation | Saves a press set-up and a handling step |
| Material 8 mm and above | Never — outside punching range | Laser, plasma or waterjet territory |
If your annual volume sits near a crossover, ask the supplier to quote both routings — the answer sometimes flips when you add or remove a single formed feature.
Cut quality: what your inspector will actually see
- Laser edge. Kerf around 0.15–0.25 mm on 2 mm mild steel, slight taper, narrow heat-affected zone. Oxygen-cut carbon steel shows a grey oxide that must come off before painting if adhesion matters; nitrogen-cut stainless gives a bright, nearly oxide-free edge.
- Punched edge. Rollover at entry, a burnished shear band, breakout with a burr at exit. Burr height of 0.05–0.10 mm is normal and grows as tools dull — if the part is hand-handled, plan a deburring step.
- Small holes and edge distance. Laser wins on both, because there is no tool load limit. Punching a hole smaller than one material thickness overloads the punch and tends to snap it, and punching closer than one thickness to an edge bulges it.
Where punching wins on features, not speed
This is the part buyers under-weight most. A turret is not just a fast hole maker; it is a forming machine that loads from a sheet. Louvers, extruded holes that add thread engagement in thin material, knockouts and half-shears, countersinks and lance-and-form bridges are all produced in the same programmed pass. When comparing quotes, check whether the cheaper one silently moved a formed feature into the press brake or a weldment — that is a quality risk, not a saving.
Getting the routing right in your RFQ
- Ask which process will be used, and whether the alternative was quoted. A shop that runs both answers immediately; one that only returns a price is guessing.
- Confirm whether tooling is included and charged once or per order. Custom turret tools should be a one-time charge that stays available for repeat orders.
- Check whether the price assumes a minimum quantity. Laser pricing is nearly linear in quantity; punch pricing drops sharply after the first sheet, so a 50-piece price extrapolated to 5,000 pieces is meaningless.
- Confirm what edge treatment is included. Deburring and oxide removal are real operations — if one quote omits them, you are comparing different deliverables.
- Send DXF or DWG at 1:1 with the outline on its own layer, material grade and thickness stated explicitly, critical tolerances and datum, bend notes covering radius and direction, plus finish, annual volume and whether this is a prototype, pilot batch or repeat programme.
Prototype to production without a requote
The most expensive routing mistake is picking a process that cannot scale. A part prototyped on a laser with a 1 mm hole in 3 mm steel cannot simply move to a punch later — the design changes, which means new drawings, a new first article and lost time. If a design is heading for volume, validate the production routing during prototyping. At Xingyuan Electric, standard orders ship in 7–15 days including prototype and pilot quantities, and each part is routed to the process giving the better delivered cost at your volume rather than the one easiest to schedule.
Frequently asked questions
Is laser cutting always more expensive than punching?
No. On low hole density, laser is often cheaper at any volume because there is no tooling and no set-up. A simple 4-hole bracket in 2 mm steel is usually cheaper laser cut even at 10,000 pieces. Punching wins only where hole count or formed features give it something to amortise.
What is the smallest hole I can specify?
For punching, keep holes at or above one material thickness — a 2 mm hole in 2 mm steel. For laser cutting, about half the material thickness or 1.0 mm, whichever is greater, is a safe floor. Below that, expect drilling or EDM and a cost step change.
Can a punched part match laser accuracy?
On the blank, yes — both hold roughly ±0.10 mm on hole position and profile. Laser is slightly better on large outlines and noticeably better on thick material, where punching accuracy degrades. Once the part is formed, the press brake dominates the tolerance and the cutting process stops mattering.
Why does punching cost more in stainless or aluminium?
Tool wear. Stainless work-hardens and aluminium tends to gall the punch, so tools need more frequent sharpening. Laser performance in stainless depends mainly on nitrogen consumption, which is why the cost ranking can flip when the material changes.
Do I have to pay for turret tooling?
Only for non-standard shapes. Round, square, obround and common rectangular tools are already in every turret library. Custom cluster tools, louvers, extrusions and special profiles carry a one-time charge of typically a few hundred US dollars.
Which process should I specify for a perforated vent panel?
Turret punching, without hesitation. A panel with several hundred openings is where the per-hit advantage is largest, and punching efficiency can be five to ten times that of a laser on the same pattern. Respect minimum hole-to-hole webbing of one material thickness.
About Xingyuan Electric
Xingyuan Electric (Suzhou) Co., Ltd. is based in Lili Town, Wujiang District, Suzhou, China, and specialises in sheet metal enclosures and electrical assembly for the energy storage, EV charging, advanced manufacturing and power distribution sectors. The company runs a 52-person team and a 5,000+ square metre production facility with more than 20 laser cutting, CNC bending and welding machines, delivering standard orders in 7–15 days and building to drawing or to sample. Laser cutting, turret punching, CNC bending, welding and finishing are handled in house, so the routing decision for your part is made on cost rather than on available capacity. Send your drawings, material specification and annual volume for a routing recommendation and quotation.