CNC Engraving Fee Guide: What Actually Drives the Price

• 1
  How a CNC Engraving Fee Is Actually Built
• 2
  Five Variables That Move the Number
• 3
  When Engraving Is the Wrong Choice
• 4
  How to Write the Drawing So the Quote Is Clean
• 5
  Why the Same Engraving Costs More at Quantity One
• 6
  Engraving Method vs. Best-Fit Case

An engraving fee is not a single rate per character. It is the sum of programming time, machine time, tool cost, and inspection time. Programming is mostly fixed: a CAM path for a logo or a serial number takes roughly the same effort whether you run one part or fifty. Machine time scales with the length of the tool path and the number of passes. Tool cost scales with how fast the cutter dulls. Inspection is small but never zero, because engraved text is a readable feature and a mis-struck character is a reject.

The fixed part of the fee is why small orders look expensive per part. On a one-off prototype, a 30-minute setup spread across a single piece dominates the number. Run the same engraving on 200 parts and the setup amortizes to almost nothing. That is the first judgment call for a design engineer: engraving is cheap in volume and costly at quantity one.

Rates also depend on which machine does the work. A dedicated engraving pass on a three-axis mill is fast and simple. Engraving on a five-axis machine that is already holding a complex part adds almost no extra fixturing, but the hourly rate is higher. The cheapest engraving is often the one cut in the same setup as the main milling, before the part leaves the vise.

One more structural point: engraving is subtractive marking, not printing. You are cutting material away, so depth is real and tolerances are real. A laser mark sits on the surface. A machined engraving has a floor, a wall angle, and a measurable depth. That difference is what makes the fee depend on geometry rather than on ink or artwork.

Depth is the first variable. A 0.1 mm deep mark for a data plate is a light scratch pass. A 0.5 mm deep logo with a flat floor needs multiple stepdowns and a smaller stepover. Cutting twice as deep roughly doubles the path length, and path length is time. Deep engraving also raises the risk of a broken cutter, which adds cost even when nothing breaks because the shop must run slower to protect the tool.

Character size is the second. A 1.5 mm tall character needs a 0.5 mm or smaller cutter. Small cutters break easily and must be fed gently. A 6 mm tall character can use a 2 mm cutter and run several times faster. When a drawing calls for tiny text, the fee is really a tool-fragility fee, not a length fee.

Material hardness is the third. Aluminum 6061 engraves quickly and cutters last. Stainless 316L and 17-4PH work-harden at the cut, so feeds drop and cutters wear faster. Titanium TC4 is worse. Inconel is worst: engraving a heat-resistant superalloy with a 0.5 mm cutter is a slow, high-risk operation even on a good five-axis machine.

Density of features is the fourth. One logo in a clear area costs little. Thirty small serialized characters packed into a 10 mm square, or text that must avoid a boss and a threaded hole, forces many retracts and short moves. Retracts add cycle time without removing metal. That is why a dense plate can cost more than a much larger but simple one.

Post-processing is the fifth. Engraving done before anodizing stays crisp and needs no extra step. Engraving after a coating means the mark breaks the coating and may need a touch-up. Laser marking is a separate line item with a minimum character height of 1.5 mm. Choosing the right marking process early avoids paying for two operations on the same face.

Machined engraving loses to laser marking when the mark is small, shallow, and purely informational. A 1.5 mm character height, a shallow depth, and a flat surface are laser territory. Laser marking is faster and does not load the spindle. The trade-off is that a laser mark can fade under some coatings and does not cut into the metal, so it is not a wear-resistant identification mark.

Engraving is wrong when the feature is on a curved or angled face that would need a fourth or fifth axis just for the text. Repositioning a part for one line of text can cost more than the text itself. If the text can be moved to a flat face or a boss top, the fee usually drops by a wide margin.

Engraving is also a poor fit for soft plastics like POM or PP at small scale. The cutter can tear the surface instead of cutting it cleanly, and the raised burr is hard to remove without dulling the crisp edge. A molded-in or laser mark often reads better on plastics.

Finally, engraving should not be used as a substitute for a real dimension. A depth callout of 0.2 mm ±0.05 mm on a rough casting face is difficult to hold because the reference surface is not flat. Put the depth on a machined face, or accept a wider tolerance and say so on the drawing.

State the character height, the depth, and the tolerance. A note like 3 mm character height, 0.2 mm depth, Ra 1.6 μm on the floor gives the shop everything it needs. Without a depth callout, two shops will quote two different operations and the numbers will not be comparable.

Pick a standard font. Engraving a customer-supplied vector logo with tight corners and thin strokes needs a small cutter and many passes. A single-line or stick font cuts in one pass per stroke and costs a fraction of the same text. For part numbers and revision codes, a stick font is almost always the right answer.

Give the reference surface. Engraving on a machined face is repeatable. Engraving on a raw casting or a weld is not. If the mark must sit on an as-cast surface, expect to pay for a facing pass first, and say whether that pass is allowed.

Say whether the mark may be cut in the same setup as the main machining. When the answer is yes, the shop can engrave before unclamping and skip a second fixture. That single note removes a setup from the quote. It is the easiest cost saving available on most engraved parts.

Setup is the fixed cost. A machinist must load the CAM path, prove it, set the Z zero on the engraving face, and cut a test mark. That work takes the same time on one part as on one hundred. On a single prototype, setup can be most of the fee. On a run of 200, it almost disappears.

Tool life is the variable cost. A 0.5 mm cutter in aluminum may hold an edge for a long run. The same cutter in stainless may need changing partway through. The shop prices for the expected tool changes, not for a best case. Harder material and deeper cuts both shorten the interval.

Inspection adds a small fixed step. Engraved text is readable, so it can be checked against the drawing. On a large run the shop may inspect the first part and sample the rest. On a single part, the check is 100 percent by definition.

GreatLight runs no minimum order quantity, from one prototype to 10,000+ part runs, and offers free DFM analysis within 12 hours of a quote request. For a part with an engraved feature, the DFM note may suggest a font change or a shallower depth that removes an operation. That is often worth more than a rate negotiation.