A transformer maker wrote to us asking for “durable metal nameplates for power transformers.” The plates sit outdoors for decades, get painted around, and must still show the serial number. That one sentence already points to the machine: dot peen. Below, you can read your own plates the same way.
Most industrial nameplates are marked with dot peen or fiber laser. Choose dot peen when the plate goes outdoors, gets painted or is thick steel. Choose fiber laser for anodized aluminum, QR codes and dense data tables. Above a few hundred plates a year, marking in-house usually costs less than ordering plates.
Five terms used on this page
- Dot peen: a hard pin taps the metal hundreds of times a second and writes the text as rows of small dents. Electric models need only a power socket; pneumatic (air-driven) models need compressed air.
- Fiber laser: a laser beam darkens the metal or removes a thin coating, without touching the plate. On black anodized aluminum it leaves white text.
- Stamping: steel dies with raised characters are pressed or hammered into the plate.
- Rotary engraving: a small spinning cutter carves the letters out, much like a tiny milling machine.
- Mark: anything the machine puts on the plate: text, a serial number, a QR code or a Data Matrix code (a small square barcode, like a QR code but more compact).
Pick by plate. Tap a card, or read on for the rules, the two HeatSign machines and the payback math.
A note on bias: I work for HeatSign. We build dot peen and fiber laser marking machines. We do not sell stamping presses or rotary engravers, so for those two I only say where they fit.
Which marking process fits which nameplate?
Match the process to where the plate lives. Outdoor equipment, transformer and pressure-vessel plates that may get painted: dot peen. Anodized aluminum asset tags and dense data plates with QR codes: fiber laser. The same short text on thousands of identical tags: stamping. Engraved plastic signs: rotary engraving.
Here is how the plates our customers send us usually split. Stainless steel is the most common material, then aluminum and anodized aluminum.
Plate | Usual material & thickness | Best process | Why |
|---|---|---|---|
Outdoor equipment, transformer, mining machine | Stainless 0.5–1.5 mm (0.020–0.060 in) | Dot peen | A dent stays readable after paint, dust and weather |
Pressure vessel, boiler | Stainless | Dot peen or stamping | Deep characters, hard to change without damage |
Valve & pump tag | Stainless 0.8 mm (0.032 in) tag | Dot peen | Short text on many small tags; a simple holding jig keeps each tag in place. Valve makers: see what goes on a valve nameplate |
Asset tag, control-panel label | Anodized aluminum 0.4–0.8 mm (0.016–0.032 in) | Fiber laser | Sharp white text and QR codes, no dent on thin plates |
Trailer & vehicle plate | Aluminum or stainless | Dot peen or fiber laser | The plate must be riveted on and stay readable |
Typical thicknesses come from nameplate makers’ product sheets: anodized aluminum at 0.4, 0.5 and 0.8 mm (0.016, 0.020 and 0.032 in), stainless from 0.3 to 1.6 mm (0.012 to 0.062 in).
Where the other two processes still win:
Stamping: the same short number on thousands of identical tags, where a die set pays off.
Rotary engraving: two-layer plastic signs and control-panel labels, where the cut shows the second color.
Both get slow when you make hundreds of plates a month and each one carries its own serial number. That is where dot peen and fiber laser take over.
Not sure where your plate fits?
Send a photo of the plate and the data it must carry. We will tell you which process and machine to use.
Will the mark stay readable outdoors or after painting?
Dot peen survives paint best, because the mark is a dent. It stays readable under paint or powder coat if it is deep enough, so mark after coating when you can. Laser marks are shallow, so paint can cover them. On anodized aluminum, the dye around the mark can fade in strong sun. On stainless, passivation (an acid cleaning step) can lighten black laser marks.
Buyers ask us this more than anything else. Typical questions: “Will it survive UV, rain and snow?” “How do I make the letters darker?”
Risk | What happens | How to avoid it |
|---|---|---|
Paint or powder coat over the mark | Shallow laser marks disappear; a deep dot peen dent still shows | Use dot peen, or mark after coating. Small lowercase letters fill in first, so test those |
Sun on dyed anodized aluminum | The laser exposes white metal under the dye. The dye around it can fade | Ask your plate supplier for lightfast dye or electrolytic (two-step) black |
Passivation of stainless after laser marking | The acid can lighten or remove a black laser mark | Mark after passivation, or use a citric (not nitric) passivation and test |
Salt, rain, heat cycles | No public test compares all processes | Mark a sample and expose it on your own site for a season |
What the sources say
- Products Finishing: even lightfast dyes can fade in service; electrolytic black holds its color for the life of the part.
- Laser Focus World: passivation (an acid bath that restores the protective layer on stainless) can fade laser black marks.
- Applied Optics: more laser heat means less corrosion resistance at the mark. That is why we set black marks with the lowest heat that still gives contrast.
Annealing (black, no depth) and engraving (depth) are explained in laser etching vs engraving on metal.
What do the rules say a nameplate must carry?
Rules set the content and how permanent the plate must be, not the machine. Some set letter height: Texas LP-gas rules want stainless nameplates stamped or etched with 4 mm (5/32 in) characters. Motor nameplates list fixed fields, and trailer labels must be riveted or permanently fixed.
Write down the fields and the letter height first. Then pick the process. Here is a short checklist for the plates we see most:
Plate | Rule | What it means for marking |
|---|---|---|
Electric motor | NEMA MG 1, section 10.40 (US motor standard) | Fields such as frame, horsepower, voltage, current, speed, insulation class, service factor and efficiency. Expect a dense table → fiber laser handles small text well |
Pressure vessel / LP-gas container | 16 Tex. Admin. Code §9.129 (an example of a state rule) | Stainless plate, stamped or etched, characters at least 4 mm (5/32 in) |
Trailer & vehicle | 49 CFR 567.4 and 565.13 (US vehicle rules) | Label “riveted or permanently affixed” so it can’t be removed without damage; vehicle identification number (VIN) marked “clearly and indelibly” |
US defense parts | MIL-STD-130 (US military marking standard) | Accepts laser-etched metal plates, photo-anodized plates (image sealed inside the anodized layer) and dot peen, among others. The mark must last the life of the item |
Adhesive labels used as nameplates | UL 969 (label durability standard) | Tests sticky labels for durability. Riveted metal plates are usually covered by the end product’s own standard |
Sources: Machine Design on NEMA MG 1 · 16 Tex. Admin. Code §9.129 · 49 CFR 567.4 · 49 CFR 565.13 · UL marking and labeling program
For your quality team
A machine is never “certified” to these rules. HeatSign machines are used to make marks that meet them. The plate and its content are what the inspector checks.
Serial number on the part itself too? See how to mark serial numbers on metal parts.
Dot peen or fiber laser: which machine for your plates?
Start with an electric dot peen nameplate machine if plates are steel or aluminum, the text is short and volume is moderate. It needs no air compressor. Move to an auto-feed fiber laser marking machine when each plate carries QR codes or data tables and you run batches unattended.
Whether you call it a name plate engraver, an ID plate engraving machine, a data plate engraving machine or a metal tag engraving machine, it is one of these two types. HeatSign builds one of each for nameplates:
Electric dot peen (HS-DE04 / DE05) | Auto-feed fiber laser (HS-FL60MA) | |
|---|---|---|
Marking area | 160 × 100 mm | 200 × 200 mm |
Materials | Steel, stainless, aluminum, brass, zinc alloy; hardened steel up to HRC 60 | Stainless, steel, aluminum and anodized aluminum |
Plate size | Placed by hand or in a jig | 30 × 30 to 150 × 150 mm, fed automatically |
Mark depth | 0.1–2 mm (2 mm only on thick steel parts; a thin plate takes much less) | Up to 0.2 mm |
What it marks | Text, serial numbers, logos, Data Matrix codes | Fine text down to 0.2 mm, QR and Data Matrix codes, tables |
Changing data | DE04: 7-inch touchscreen, no PC. DE05: PC software, auto serial numbers | Imports serial numbers and other data from Excel |
Needs | Power socket (DE05 also needs a PC) | Power and compressed air (for the feeder) |
Price | $1,300–1,900 | About $6,500 |
Steel and aluminum plates, short text: electric dot peenNo compressed air needed. Touchscreen or PC. $1,300–1,900.See the metal tag engraving machine → 
Batches of data plates with QR codes: auto-feed fiber laserLoads and marks plates unattended. Excel import. About $6,500.See the auto-feed nameplate laser →How many plates per hour?
It depends on how much you mark. A 10-digit serial number takes seconds. A full motor data table with a logo and a QR code takes much longer. HeatSign does not quote a fixed figure: send two or three plates with your real data, and we time it for you.
Where each one stops
Laser marks on stainless are shallow (0.2 mm at most here), so skip the laser if the plate gets painted over. The electric dot peen marker is slower on long text and won’t make the fine print a dense motor table needs.
Is it cheaper to buy nameplates or make them in-house?
Buying plates costs about $3–13 each, plus minimum orders of $300–400 and lead times of 3–4 weeks. A $1,300–1,900 electric dot peen nameplate machine pays back after a few hundred plates. A $6,500 auto-feed laser pays back after one to two thousand.
Here are list prices on nameplate suppliers’ own pages:
What you buy | Price per plate | Source and conditions |
|---|---|---|
Laser-etched aluminum plate, 0.8 mm (1/32 in), up to 20 characters | $4.51 (1–99), $3.66 (100–249), $3.11 (250+) | PipeMarker list price |
Stamped stainless valve tag, serial numbers | $3.33–3.69 | PipeMarker list price |
Aluminum data plate, fixed layout | $2.82–13.22 | Clarion list price |
Custom metal nameplates | — | Express Corp: $300 minimum order |
Photo-anodized plates (image sealed in the anodized layer) | — | Metalphoto of Cincinnati: $400 minimum per part number, plus setup |
Custom stamped plates | — | Lawson Products: 3–4 week lead time |
Plates to pay back = machine price ÷ (price per bought plate − your cost per blank, unmarked plate)
Example (our assumption for illustration): if marking in-house saves $3–8 per plate after you pay for the blank plates, a $1,300–1,900 dot peen nameplate machine pays back after about 160–630 plates ($1,300 ÷ $8 to $1,900 ÷ $3).
A $6,500 auto-feed laser pays back after about 810–2,170 plates ($6,500 ÷ $8 to $6,500 ÷ $3).
One buyer told us they run “100–200 plates per shift.” At that rate, the dot peen machine pays back within a few shifts. The bigger win is often time: no waiting three weeks for plates while your finished equipment is ready to ship.
For the cost of a full dot peen setup, see what a dot peen marking machine costs.
How do you run serial numbers, QR codes and thin plates?
Let the software change the data, not the operator. Import serial numbers from Excel or let the number count up by one on each plate, and pull the QR or Data Matrix content from the same Excel row. Clamp thin plates flat on a fixture, because 0.4–0.8 mm (0.016–0.032 in) aluminum flexes under a dot peen pin.
Step | What you do | What can go wrong |
|---|---|---|
1. Build a template | Place text, serial number, logo and QR code once | Text too close to rivet holes |
2. Load the data | Import an Excel sheet, or set auto-increment (start number + step) | Leading zeros dropped by Excel; format the column as text |
3. Hold the plate | Use a jig (a holder cut to the plate shape) or the feeder’s guide; support thin plates fully | Plate bounces under the pin → blurred dots |
4. Check the first plate | Read the text, scan the QR or Data Matrix code with a phone or barcode reader | Skipping this and marking 200 wrong plates |
The HS-DE04 runs from its own touchscreen, without a PC. The PC-based HS-DE05 auto-increments serial numbers. The HS-FL60MA reads the data from Excel and changes it plate by plate as the feeder loads them.
If you are weighing an automatic feeder against a simple jig tray, read automatic nameplate feeders vs jig trays.
FAQ
How much does a nameplate engraving machine cost?
An industrial nameplate engraving machine costs about $1,300–1,900 for an electric dot peen model such as the HeatSign HS-DE04/DE05, and about $6,500 for the HeatSign HS-FL60MA fiber laser with automatic plate feeding.
What machine is used to make metal name plates?
Factories mostly use dot peen markers for steel and outdoor plates and fiber laser marking machines for anodized aluminum and plates with QR codes. Stamping presses suit long runs of identical numbers; rotary engravers suit plastic engraving stock.
Can a fiber laser mark anodized aluminum nameplates?
Yes. A fiber laser removes the dyed layer and leaves sharp white text, QR codes and logos. For plates that sit in the sun, choose lightfast dyed or electrolytic black anodizing, because the dye around the mark can fade.
Does a dot peen nameplate machine need an air compressor?
No, not the electric type. The HeatSign HS-DE04 and HS-DE05 run from a power socket. Pneumatic (air-driven) dot peen markers and the HS-FL60MA plate feeder need compressed air.
Can I import serial numbers from Excel?
Yes. The HS-FL60MA imports serial numbers and other data from Excel, and the PC-based HS-DE05 can auto-increment serial numbers. Format the Excel column as text so leading zeros are kept.
Can a nameplate machine write names on steel dinner plates and utensils?
Yes. An electric dot peen marker writes names and numbers on steel and stainless kitchenware, such as dinner plates, bowls and utensils, up to HRC 60 hardness. Curved items need a fixture to hold them steady.
What should you do before you buy?
Most wrong purchases we see come from choosing by brochure, not by plate. Someone buys a laser for plates that get painted, or a dot peen marker for a dense motor table with tiny text. Write down three things first: where the plate will live, what it must carry, and how many you mark a month.
With those three answers, the choice is usually obvious from the table above. If it is not, send HeatSign the plate material, size and a sample of your data. Email or WhatsApp us, and we will tell you which of the two machines fits, and what it costs.
Sources
- Products Finishing: black dyed anodized parts and lightfastness
- Laser Focus World: marking corrosion-resistant surfaces
- Applied Optics: laser marking and corrosion resistance of stainless steel
- Machine Design: basics of motor nameplates (NEMA MG 1)
- 16 Tex. Admin. Code §9.129
- 49 CFR 567.4 and 49 CFR 565.13
- UL: marking and labeling systems (UL 969)
- Protocase: dot peening and coated parts
- PipeMarker, Clarion, Express Corp, Metalphoto of Cincinnati and Lawson Products: nameplate price and order pages
Hola en donde puedo conseguir una máquina que grabe chapas de acero inoxidable tipo recordatorios para cementerios.
You can email your request to info@heatsign.com
Hola buenas tardes, dónde puedo comprar una máquina para grabar placas militares?
Envíe su solicitud a info@heatsign.com
Envíe su solicitud a info@heatsign.com y le responderemos lo antes posible.
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That’s good to know that you can get a laser cutting machine that uses rotary engraving but that you need to know the correct depth and speed in order to use it. This would be good to use for different nameplates if they have a company logo they want on it since it would be able to do different shapes. It would be smart to hire a company that does laser engraving as a business if you want nameplates since they’ll already know how to use the rotary engraving so it will look professional.
Yes, if do not have much plates to engrave, outsource a laser engraving service will be a good choice.
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A year ago, our company was faced with the need to purchase a fiber laser marking machine. Despite the wide choice of other manufacturing companies, we decided to choose 30W Fiber Laser Marking Machine from HeatSign. The main advantage of the device is great endurance with low energy consumption. It has marking speed of ≤9000mm/s and marking area of 100mm x 100mm. In practice, this means a significant increase in productivity, an increase in the number of orders and the speed of their implementation. Just in two words, it’s great!