The Part Survived Grinding and Broke in the Box

August 13, 2026

A ground and lapped ceramic part that passed inspection can arrive as three pieces. Transit damage is not rare in this niche, and it is almost always a packing decision rather than bad luck.

Because packing is usually left unspecified, it also becomes an argument about who pays. Both problems are solved in the same paragraph on the order.

Why ceramic breaks in transit

No plastic deformation. A metal part absorbs a knock. A ceramic part passes the energy straight to its weakest flaw.
Edges do the failing. Every packing failure concentrates on a corner or an edge, which is where a chip becomes a crack.
Resonance. Long unsupported parts vibrate against foam in a truck or an aircraft hold for hours.
Stacking. A box marked fragile still ends up under something heavier.
Temperature. Rapid cooling on an airfield and reheating in a warehouse is a thermal cycle, and condensation is a cleanliness problem for semiconductor and medical parts.

What good packing looks like

Individual wrapping. Each part separated, so ceramic never touches ceramic or bare metal.
Fitted support. Die cut foam, a moulded tray or a cavity cut to the part, not loose fill around a shape.
Edge protection. Extra material at corners and any protruding feature.
A rigid inner box inside an outer box, with a cushioning gap between them. Single boxing is the most common failure.
Immobilisation. The part must not move inside its cavity. Movement is what starts the chipping.
Cleanliness maintained. For semiconductor and medical parts, cleaned parts go into a bag inside the packing, and the outer packing never becomes the clean barrier.
Labelling that means something. Orientation, handling instructions and a note that the contents are brittle ceramic, not just a fragile sticker.
Crating for anything large. Bolted or screwed, not nailed, so opening it does not shock the contents.

Put it on the order, not in a phone call

Useful wording to paste in:

Parts individually wrapped, no ceramic to ceramic contact. Fitted foam cavity per part, immobilised. Double boxed with a minimum 40 mm cushioning gap. Cleaned parts double bagged before packing and the bag not opened during packing. Outer box labelled brittle ceramic with orientation marked. Photographs of the packed goods before dispatch.

That last item costs nothing and settles most disputes in minutes.

Delivery terms decide who carries the risk

Terms like EXW put risk on the buyer from the supplier door. Terms like DAP or DDP keep it with the seller for longer. Neither is right or wrong, but it needs deciding before the parts move, because it determines whose insurance responds and who has to prove how the damage happened.

Three practical points:

Whatever the term, specify packing anyway. A term allocates risk, it does not prevent breakage.
For high value parts, ask what insurance covers and at what declared value.
Keep the photographs of the packed goods. They are the evidence.

Budget for it honestly

On a small high value part, proper packing and air freight can be a visible share of the order. It is still cheaper than a remake, because the remake costs the part price plus the lead time again, and the lead time is usually the expensive part. See ceramic part lead times explained.

When you compare quotes, check whether packing and freight are in the number at all. One quote including a fitted crate and another including a cardboard box are not the same price. That check and seven others are in how to compare three ceramic quotes.

Packing is one of the steps in buying machined ceramic parts, next to the customs description and the first article check. For the customs description that goes with the shipment, see HS codes for ceramic parts.

Send your drawing and tell us where the parts are going. We match you with up to 3 shops and the packing requirement goes out with the RFQ, not after the first breakage. Reply within 24 business hours.

Frequently asked questions

Who pays if a ceramic part arrives broken?

It depends on the delivery term and on whether packing was specified. Under EXW the risk passes at the supplier door, which is why packing requirements belong in the order rather than in a phone call afterwards.

Should ceramic parts be shipped by air or sea?

Air for small high value parts, both for speed and because fewer handling events means less risk. Sea freight is normal for large or heavy parts, but the crate has to be built for it.

Do parts need individual packing?

Yes for anything with a ground or lapped surface. Ceramic against ceramic chips on the first bump, so parts need individual wrapping or a fitted tray, not a shared bag.

Need a quote for this part?

Send the drawing. We match you with up to 3 shops that grind this grade and reply within 24 business hours.

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