Automotive Marking · Engine · Transmission · Chassis · Interior
Automotive marking is judged at your customer, not on your own shop floor. HeatSign builds dot peen for parts that get painted later, and laser for parts that do not.
Pick the machine by what happens to the part after marking. HeatSign builds both kinds — dot peen machines that press the mark into the metal with a pin, and laser machines that mark the surface with light — so the advice follows your process, not what we want to sell.
Bench Dot Peen · Electric
Price Range : $1900 ~ $2900
Gear cases ． Brackets ． Housings ． Flanges ． Fasteners
HS-PE01-P · Pneumatic portable
Compressed air pushes the pin harder than an electric motor, so the mark goes deeper. Engine blocks and chassis parts need that, because they are blasted and painted after marking. A seven-inch screen is built in, so you do not need a computer beside the machine.
Engine blocks ． Cylinder heads ． Chassis parts ． Raw castings
Cordless Dot Peen · Battery
Price Range : USD 1,600 ~ USD 2,850
No cable and no air line. You carry the head to the vehicle instead of moving the vehicle to a machine. That is what frame numbers, engine numbers and re-marking after a repair need.
Frames . Assembled chassis . Large weldments . Field re-marking
HS-DP200-R · Rotary dot peen
Price Range : USD 3000 ~ USD5000
The fixture turns the part while the head stays still, so the pin hits with the same force all the way round. Mark a round part without it and the middle comes out deep and the ends shallow, which is what makes a code fail its check.
Shafts . Axles . Camshafts . Bearing races . Couplings
Desktop Fiber Laser · 20W / 30W / 50W
On a machined surface that will not be painted, a laser marker for automotive components gives a sharper, higher-contrast code than dot peen. Nothing touches the part, which matters on thin walls.
Machined faces . Nameplates . Sensor bodies . Thin-wall parts
Plastic interior parts, connectors or fuse boxes? Those need a cold beam that does not melt the edge of the code. See the UV laser marking machine for those.
The mark goes on when the part is still raw. Then it is washed, heated, blasted and painted — and only one kind of mark survives all of that.
Four questions about the part. The first one decides the technology.
QUESTION 1
Yes → dot peen, with depth.
No → laser gives finer codes.
QUESTION 2
Rough as-cast → dot peen.
Machined pad → laser reads better.
QUESTION 3
Round → rotary fixture, or depth varies across the code.
QUESTION 4
Yes → bench.
Already assembled → portable or battery head.
We will tell you when the cheaper machine does the job. A rotary fixture looks impressive in a demo. If all your parts are flat brackets, it is money you do not need to spend.
Automotive part marking covers more surfaces than most suppliers expect. These eight families cover almost everything a tier 2 or tier 3 supplier is asked to mark.
Six parts, one traceability system. Different surfaces, different beams, the same serial running through all of them.
Part family | What gets marked | Start with | Add later |
|---|---|---|---|
Engine blocks & cylinder heads | Serial · cast date · plant code · Data Matrix | Rotaryfor round parts | |
Transmission & gear cases | Part number · serial · lot code · Data Matrix | Desktop fiberfor fine codes | |
Chassis, frames & weldments | Frame number · assembly ID · build date | HS-PE01-Pfor depth in the shop | |
Shafts, axles & camshafts | Heat number · batch · grade · Data Matrix | Desktop fiberfor machined faces | |
Brake & suspension parts | Part number · lot · date code · supplier code | Rotaryfor round parts | |
Machined & finished faces | Fine Data Matrix · serial · logo | MOPAfor colour or black | |
Plastic interior & connectors | Part number · material code · recycling mark · cavity number | Desktop fiberfor thicker parts | |
Nameplates & data plates | Compliance data · VIN plate · ratings | UV laserfor fine detail |
VIN and chassis number marking is a separate job with its own legal requirements. See VIN and chassis number marking →
Labels still make sense for boxes and pallets. What changed is that the part underneath now carries its own identity too.
Automotive parts labeling
Direct part marking
Four things that decide whether a supplier passes an audit or reworks a batch.
What HeatSign does
We set the machine to read well, not to only just read. Tell us the grade your customer asks for and we will say whether your surface can reach it.
What HeatSign does
On raw castings, dot peen at a larger cell size beats a fine laser code every time. If the drawing already has a machined pad, laser is the better choice.
What HeatSign does
We quote against your real code and your real cycle time, not a demo. Send the code content, the character height and how many seconds you have per part.
What HeatSign does
The software auto-increments serials and reads part numbers, lot codes and heat numbers straight from a spreadsheet or a database export, then builds the Data Matrix from the same source.
If you supply into an OEM programme, this is why marking came up. If you make your own aftermarket parts, you can skip this part.
Standard | What it covers | What it means for the machine |
|---|---|---|
IATF 16949 | Traceability across the supply chain | Unique, permanent identification on every part |
AIAG B-17 | Direct Data Matrix marking on parts | Cell size and placement drive the machine and the cycle time |
ISO/IEC 29158 | Grading a direct part mark | The code is given a score, not just read. Settings need room to spare |
VIN regulationsFMVSS and equivalents | Permanent vehicle identification | Depth and character height are specified — see the VIN page |
Read this as background, not as advice. The real requirement comes from your customer’s part drawing and supplier manual, and those are usually stricter than the standard they refer to.
Tell us the numbers you have been given — mark depth, character height, code size — and we will say whether our machines can produce them. Your customer decides whether that meets their standard.
It is the right question for suspension arms, steering parts and connecting rods. Any dent is a small stress point, which is why part drawings usually say where you may mark and where you may not.
A dot peen pin has a rounded tip and leaves a rounded dent, not a sharp cut like a hand stamp.
Stay inside the marking area on your customer’s drawing. Send us that drawing if you want us to check the machine can reach it.
Dot peen can. The pin pushes through a film of oil, coolant or light rust, so parts coming straight off a machining centre do not need cleaning first.
A laser cannot. Oil on the surface burns and leaves a dirty mark with poor contrast, so laser marking needs a clean, dry part.
Most suppliers mark before, because the part is softer and the mark goes deeper with less force. The risk is that furnace scale or distortion closes up a shallow mark.
Marking after heat treatment avoids that, and dot peen still works up to 60 HRC. Tell us the hardness and which step you want to mark at, and we will say if it is realistic.
Yes. Each part number is saved as its own file, with its own text, position and settings. The operator picks it from a list, so changeover is choosing a file, not resetting the machine.
What does change between parts is the fixture that holds them. If your parts are very different shapes, plan for two or three simple fixtures rather than a second machine.
The pin is the only real consumable. On normal automotive steel it lasts around three to six months of production, and pins are inexpensive.
Harder material and deeper marks wear it faster. A worn pin shows up as a shallower, rounder dot long before it fails, so it is a planned change and not a breakdown.
If your customer asks for a graded code, yes. A verifier is a separate device that scores the code against ISO/IEC 29158 — the marking machine makes the code, it does not measure it.
Many suppliers start with an ordinary barcode scanner just to check the code reads, and only buy a verifier when a customer asks for a grade on paper.
The pneumatic portable is $2,000 to $3,000 and the rotary system $3,000 to $5,000. Bench dot peen, cordless dot peen and desktop fiber are priced on how they are configured, because marking area, power and fixtures all change the price.
Send the part, the code content and your daily quantity and you will have a figure the same working day.
