Which bearing laser marking machine do you need?
Three things decide it: the size of the bearing ring, where on the race you mark, and what the ring is made of.
HeatSign · Bearing laser marking machine
Bearing laser marking machine for rings and races
A bearing ring is hard, oily and curved. All three make it hard to mark. A HeatSign bearing laser marking machine handles all three, and we prove it on your material before you buy.
GCr15 chrome steel, stainless, ceramic and hybrid. Ball, roller, tapered, thrust and slewing rings.
No need to ship a ring. Send a photo and the drawing, and we will mark the same or similar material here and send you the result.
Bearing rings up to diameter 100 mm
Fiber laser with rotary axis
The HeatSign machine most bearing makers buy. The chuck turns the ring, so a code on the outer diameter stays square. Works on GCr15 and stainless steel and other metals.
Side flat surface marking only
Desktop fiber laser marking machine
If you only mark the flat side face, you do not need a rotary axis. Brand, bearing number and small codes on a bench, you can choose a hot sale 30W fiber laser marker for this job.
Bearing Parts too heavy to lift
Handheld laser marking machine
The marking head goes to your parts instead of the part going to the machine. Used for wind, crane and gearbox bearings.
Ceramic and hybrid
UV laser marking machine
Some bearing material like Silicon nitride and zirconia crack under a fiber laser. However, a UV Laser Marker can work on various materials’ bearing parts.
Does your marking look genuine?
Fake bearings are a real problem. Buyers check the marking first when they are not sure.
A weak mark on a real bearing makes people doubt it. These are the checks they use.
Looks fake
Rubs off, rough, uneven
Acid etched or ink stamped. It smears with solvent, feels rough, and the letters are different sizes. It fades in months.
Looks genuine
Sharp, smooth, permanent
Laser marked in one pass on a HeatSign machine. It survives solvent and oil, feels level with the surface, and every character is the same.
This is worth money. If your bearings are real but the marking is poor, you lose sales you should have won. A clean laser mark is the cheapest proof of quality you can put on a ring.
What a bearing laser marking machine puts on the ring
Seven things go on a bearing. Not every maker uses all of them.
One bearing part, two marking areas. The face carries the name, the outer diameter carries the code.
Content | What it is for | Usual place |
|---|---|---|
Bearing number | The full designation. This is what a buyer reads first. | Side face |
Brand and logo | Your mark, and the first thing anyone checks for a fake. | Side face |
Country of origin | Required in many markets, and often audited. | Side face |
Batch or lot code | Links the bearing ring back to a heat, a shift and a machine. | Outer diameter |
Date code | Week and year, or a full date. | Outer diameter |
DataMatrix or QR code | Holds everything above in one square. Scanned at assembly. | Outer diameter |
Serial number | One number per bearing ring, for full unit tracking. | Face or outer diameter |
Each area has its own limit
This is usually the first thing we talk about with a new customer.
Flat, no rotary needed
Curved, rotary needed
Angled, needs a fixture
Ask before you mark here
Four things that go wrong with bearing marking
These four cause almost every bearing marking complaint we hear.
01 Too much heat softens the steel
A bearing ring is hardened to 60 HRC or more. Too much laser heat in one place lets the steel go soft again. The mark looks fine. The ring wears out early.
Short pulses, not more power. The energy goes in and out fast, so the heat stays at the surface. HeatSign checks hardness before and after on your own ring and sends you both readings.
02 Oil stops the scanner reading the code
Bearings are always oiled. A pale, shallow mark cannot be seen through the film. The reader fails and the line stops.
Mark dark enough to read through oil. Then nobody has to wash rings before the scanner. This is a settings question, and we set it on your part.
03 A stamped mark leaves a groove
A ring carries load every second it turns. A stamped or pin mark pushes metal aside and leaves a groove. Stress builds up in that groove.
Laser removes far less metal. The ground surface stays almost flat. This is why bearing rings are lasered and not stamped. Where you put the mark still matters, so send us the drawing.
04 Codes stretch on the outer diameter
The outer face is curved. Mark a flat code on it and the cells stretch at the edges. A stretched DataMatrix will not scan, even though it looks fine.
Turn the ring instead of stretching the code. A rotary axis rotates the part under the beam so every cell stays square. Flat side faces do not need this.
Bearing laser marking questions we get most
Does laser marking shorten bearing life?
No, not when it is marked in the normal place. A bearing wears out at the raceway, where the balls or rollers run. A mark on the side face is nowhere near that surface.
SKF marks bearing ring side faces with a laser as standard practice, and their own patents describe marks reaching 0.3 to 0.5 mm deep. Ours are shallower. Independent testing on hardened steel shows no measurable cracking under the surface and no real change in hardness when the settings are right.
The one thing to avoid is marking inside the raceway. That is a design decision, so check your drawing before you choose the position.
Do you mark before or after heat treatment?
After. If you mark first, the heat treatment and the grinding that follows can change or remove the mark, and you lose the trace.
Marking a hardened bearing ring is not a problem for a laser. It is a problem for a pin marking, which is why hardened rings are laser marked
How long does one bearing ring marking take?
A short code on a side face takes 3 to 10 seconds. A full datas around an outer diameter with a rotary axis takes longer, usually 20 to 40 seconds, because the bearing ring has to turn.
Loading and unloading the part usually takes more time than the marking itself.
We make many different bearing sizes. Do we need one machine for each?
Usually not. One machine covers a range of sizes. What changes between sizes is the fixture that holds the bearing part, not the marking head.
Tell us your smallest and largest bearing parts, and the range of marking areas. We will tell you whether one machine covers it all, or where the range has to split.
Can we mark bearings that are already assembled and greased?
The side face and the seal, yes. That is common for distributors and for rework. The raceway, no, because the laser will burn the grease and leave residue inside the bearing.
If you mark assembled bearings, add a fume extractor. It keeps both the lens and the bearing clean.
Can you mark ceramic and hybrid bearings?
Not with a fiber laser. Silicon nitride and zirconia can micro crack under it. Use a UV laser, which marks cold.
Tell us the material before you order, because it changes which machine you need.
Our customer audits our mark quality. What do we need?
Two things: proof that each mark is readable, and proof that the data came from your system, not from someone typing.
For readability, add a code reader that grades every mark against ISO/IEC 15415 and keeps the record. That is what the auditor asks to see.
For the data, there are three ways to feed it, from simplest to most involved:
- Set it in the software. Serial numbers, dates and shift codes run automatically, with no file and no connection needed. This covers most cases.
- Import an Excel file. Prepare the codes in advance, load the file, and the machine works through the list as you mark. Good when the codes come from a planning sheet rather than a counter.
- Connect to your database. The machine talks to your MES or ERP over TCP. This is the fullest option, and it usually needs some development work on both sides, so tell us early if you need it.
Whichever way you choose, the number is never typed at the machine. That removes the most common cause of wrong codes.