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The Four Lines Shops Underestimate When They Quote Ceramic
May 21, 2026
Ceramic quotes go wrong in four places, and they are rarely the machining hours. This is a structure for pricing the job so the margin survives contact with the part.
Line 1: wheel wear and dressing
On metal, tooling is a small line. On ceramic it is not, and on silicon carbide it can rival the machine time.
- Price wheel consumption per part, not per job, using your own records by material
- Dressing time is machine time, so count it
- Form wheels carry their own cost and their own lead time, and a one off form on a small order is a real number
If your quoting sheet has one tooling percentage applied to every material, silicon carbide jobs are subsidising alumina jobs.
Line 2: fixturing and handling
Brittle parts need support, and the support is often specific to the part.
- Soft jaws, potting, vacuum chucks, backing plates and sacrificial supports all take time to make
- Thin and slender parts need intermediate support that does not appear on any drawing
- Handling between operations is slower, and it should be
Quote fixture design and build as a separate line on the first order. Customers accept it far more readily than a piece price that silently includes it.
Line 3: scrap allowance
Ceramic scrap is normal. Hidden scrap is what destroys margin.
Build the allowance from geometry rather than from feel:
| Feature present | Effect on allowance |
|---|---|
| Thin walls below 1 mm | Significant increase |
| Cross holes breaking into a bore | Significant increase |
| Sharp or undefined edges on the drawing | Increase, and raise it as a question |
| Long slender features | Increase |
| Simple ground disc or block | Near zero |
Two practical habits: state the allowance on the quote, and agree in writing who carries scrap beyond it. A buyer who understands the number will usually accept a design change instead, which is better for both sides.
Line 4: inspection and reporting
CMM time on ceramic is slower than on metal, probe tips wear against hard grades and calibration intervals shorten. Add report writing, material certificate handling and, for regulated work, cleanliness documentation.
Quote first article inspection separately from production inspection, and say what the sampling plan is. It stops the piece price looking wrong.
The structure that quotes well
- Blank cost, including the stock you will grind away
- Green machining or roughing hours
- Firing, if applicable, including queue assumption
- Grinding hours by operation, with wheel wear per part
- Finishing operations, lapping and polishing priced separately
- Fixture design and build, first order only
- Scrap allowance, stated
- Inspection, first article and production, stated separately
- Cleaning, packing and documentation
- Lead time assumption, with the blank availability caveat in writing
Quote the alternative too
The highest value thing a ceramic shop can do on a quote is to offer a second price with one change: a relaxed tolerance, a radiused corner, a chamfer added or one face left as fired. Buyers rarely know which of their callouts is expensive, and the shop that tells them wins the relationship as well as the order.
It also moves the conversation away from price alone, which is the only defence against being compared purely on number. The buyer side of the same argument is in what drives ceramic machining costs and 12 design rules for a ceramic part.
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Frequently asked questions
How should scrap be priced into a ceramic quote?
As an explicit allowance tied to geometry, not as a margin cushion. Thin walls, cross holes and sharp features carry a real percentage, and pricing it openly is easier to defend than a vague higher number.
Should a shop quote the drawing as written?
Quote it, then offer an alternative. A second price with one tolerance relaxed or one corner radiused often wins the order and raises your margin at the same time.
How do you price a first article?
Separately. First articles carry setup, inspection and report writing that do not repeat on the production run, and burying them in the piece price makes the piece price look uncompetitive.
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