A blade fails in service, the fleet raises a claim, and the file contains a packing list and nothing else. Without the material declaration or the joining record, nobody can show the lot was made as specified, and the claim turns into a negotiation rather than a review.
The documents are not paperwork for its own sake. Each one closes a specific question that will otherwise be settled by opinion, and the set is short enough that a supplier can produce it with every shipment.
What the document pack has to prove
Every document in the pack answers a question that would otherwise be unanswerable after the goods have been fitted and used.
Those questions arrive in a predictable order. Was the material what was ordered? Were the dimensions inside the tolerance? Was the joining step performed under the process the specification assumed? Which production batch is this piece from? What exactly was dispatched? Did anything deviate from the agreed specification, and was it accepted?
Each one maps to a single document, which is why the pack is short. It is also why removing one document leaves a gap that cannot be filled from the others: a dimensional record says nothing about the grade, and a certificate of conformity says nothing about which lot it applies to.
Supplier documentation wear parts should contain
Five documents cover a normal wear part shipment.
A packing list, a material declaration, a dimensional record against the agreed revision, the inspection result for the joining step, and a batch reference tying the lot to its production record, with a deviation note added only where something departed from the specification.
The list is deliberately short because each item has to be produced for every shipment, and a pack that takes an hour to assemble is a pack the supplier eventually stops assembling. Everything beyond the five is either a substitute for one of them or a document required by a specific market rather than by the product.
| Document | What it proves | Issued by |
|---|---|---|
| Packing list | What was dispatched, in what quantity and how packed | Supplier, at dispatch |
| Material declaration | Which grade was supplied and the standards the values were measured to | Supplier, referencing the material batch |
| Dimensional record | The stated dimensions were measured and were inside tolerance | Supplier’s inspection function |
| Joining inspection result | The bonding step was performed and inspected to the agreed method | Supplier’s production or inspection function |
| Batch reference | Which production record the piece belongs to | Supplier, marked on the part, the label or both |
Where an independent certificate is required, it replaces the declaration rather than joining it, and it is normally ordered specifically. Material test methods behind the values in a declaration are published by ASTM International, and the steel specifications referenced for the body of an edge come from the same direction.
Material and grade certificates
The material document is the one that settles the most expensive argument, because a grade substitution is invisible once the part is fitted.
A usable declaration names the grade supplied, the hardness range and the values the supplier measured to, and references the incoming material batch. Where a buyer has specified a micro-grain grade, the grain size belongs in the document as well, because hardness alone does not distinguish a fine-grain grade from a coarse one.
The document should also make clear where the material originated, since buyers with supply-chain requirements need that stated rather than implied. If the supplier cannot say which material batch a delivered lot came from, the declaration is a description of the product rather than a record of it, and it will not support a claim.
Dimensional inspection reports
A dimensional record is only useful when it names the dimensions and shows the values, rather than announcing that the lot conforms.
The buyer’s specification decides which dimensions belong on it, and the practical rule is that any dimension marked critical should appear with its measured value. A one-line statement that the lot meets the drawing is impossible to compare with anything, and it cannot distinguish a part sitting at the nominal from one sitting at the edge of tolerance.
- The critical dimensions named in the specification, with measured values rather than pass marks.
- The drawing revision the measurements were taken against.
- The instrument and method, where the tolerance is tight enough for the method to matter.
- The sample size or inspection level, so the record can be interpreted.
The fourth item is the one buyers rarely request and later wish they had. A record that shows one piece from a lot of two hundred is a different statement from one that shows five, and the difference matters when a single non-conforming part appears in service.
Process records for brazing and heat steps
The joining record is the document that most often goes missing and the one that decides the most claims.
A failed insert is usually a joining failure rather than a grade failure, and the evidence of how the join was made exists only at the time it was made. What the record needs to show is the method, the parameter window the step was run inside, and the inspection applied afterwards, whether that is a visual check, a shear or bend test, or a controlled sample from the lot.
Set points and cycle recipes can reasonably stay confidential, and most manufacturers will not release them. The output record cannot be withheld, because it is the buyer’s only evidence about the step, and a supplier unwilling to state that the process was run inside its window and inspected is asking to be trusted instead of checked. The joining process SENTHAI uses is described on the quality control page.
Traceability and lot marking
Traceability works only if the mark survives the journey from the pallet to the machine.
A batch reference printed on the outer carton is lost the moment the carton is opened, which in a fleet workshop is immediately. The mark needs to be on the part, on a label attached to the part, or on both, and it needs to be readable after storage. A few characters is enough, provided the supplier’s record can be looked up from them.
Two habits make the system useful. The receiving team should record the batch reference against the storage location, so the mark can be found again without unpacking everything. And a complaint should be raised quoting the mark rather than the delivery date, because the mark is what identifies the actual production record instead of a shipment that may contain several lots.
Packing list and shipping documents
The packing list is the document everything else is reconciled against, so it has to be detailed enough to check a pallet without opening it.
Item codes, quantities, unit and total weight, dimensions and the number of packages are the minimum. Where branding or packaging was specified, the list should state which version was packed, because that is the item most likely to differ quietly between shipments.
The transport and customs documents that travel with a consignment depend on the delivery term agreed for the order, and the obligations of each party under those terms are set out by the International Chamber of Commerce. Import requirements are set by the destination authority, such as US Customs and Border Protection. Filing practice for the receiving function is described alongside the terms on the warranty and shipping page.
Non-conformance and deviation notes
A deviation note is what keeps a minor departure from becoming a dispute two seasons later.
Where something about the lot differs from the specification, the note records what differed, by how much, why it happened and whether the buyer accepted it. A cosmetic difference in marking and a dimensional departure both belong in the same document, with the acceptance recorded in writing, because the difference between a waiver and a defect is whether anyone agreed to it.
Two rules make the notes usable. They travel with the shipment rather than arriving after a query, and they reference the specification clause they depart from. A note that says the lot was made with an alternative finish is far less useful than one that names the clause and states the substitute.
Filing and retention practice
Retention should be set by the life of the part plus its warranty, not by a general policy on paperwork.
For a seasonal wear part, that normally means three winters: long enough to cover the warranty, a repeat failure and a procurement audit in the same period. Store the pack by batch reference rather than by delivery date, because a complaint quotes the mark, and keep the deviation notes with the rest of the pack rather than in a separate correspondence file.
A single folder per lot, named by batch reference, is the practice that survives staff changes. The alternative, common in practice, is a shared inbox where the documents exist but cannot be found in the week they are needed.
Checking the pack at goods-in
The receiving check takes a few minutes and is the only point at which a missing document can be requested cheaply.
Four checks catch almost everything: the pack is present, the documents reference the same batch as the goods, the quantities on the packing list match what was unloaded, and any dimension quoted on the record can be verified against the piece in front of the receiver if it is a critical one.
- Confirm the batch reference on the parts matches the batch reference on the documents.
- Check the drawing revision on the dimensional record against the current approved revision.
- Confirm the packing list quantities against the pallet before it is put away.
- Log any missing item the same day, while the shipment is still identifiable.
The inspecting routine used for carbide inserts on arrival is set out on the insert delivery inspection page, and the same sequence applies to any bonded wear part.
What to do when a document is missing
A missing document is a supplier issue rather than a receiving issue, and it should be raised as a non-conformance rather than as a request.
The practical sequence is to log the gap, place the lot in quarantine if the missing document is the one that proves the grade or the join, and ask for it in writing with the batch reference quoted. Most suppliers can retrieve a record from a batch reference within a day, and the ones that cannot are telling the buyer something important about how their own production records are kept.
Where a document cannot be produced at all, the lot is treated as unverified rather than as rejected. That distinction matters operationally: an unverified lot can still be released deliberately, on a recorded decision, where the application is not critical and the risk is understood. What should not happen is a lot entering stock as though the documents had arrived. Equipment and material standards referenced in these checks come from bodies such as SAE International, and fleet quality expectations from the American Association of State Highway and Transportation Officials.
FAQ
Which documents should arrive with every wear part shipment?
A packing list, a material declaration for the grade supplied, a dimensional record against the agreed revision, the inspection result for the joining step where the part is bonded, and a batch reference that ties the lot to its production record.
Is a material certificate the same as a material declaration?
Not always. A declaration states what was supplied and the standards the values were measured to, which is what the buyer can check at goods-in. A third-party certificate is issued by an independent body and is a stronger document, but it is normally reserved for specific orders and carries a cost.
How does lot traceability actually work?
The lot mark on the part or the packaging matches a production record held by the supplier, which names the material batch and the process used. Tracing a complaint back means quoting that mark, so the mark has to survive storage and fitting rather than sit only on the outer carton.
How long should documentation be kept?
Keep it at least as long as the service life of the part plus the warranty period, because a claim or an audit arrives after the goods have been consumed. For a seasonal wear part that normally means three winters rather than one.
Ask SENTHAI for a sample documentation pack with any quotation. It shows the material declaration, the dimensional record, the joining inspection result and the batch reference that travel with each lot.
This article is one step in the Sourcing Carbide Wear Parts Guide, which covers the technical pack, supplier selection, landed cost and supply risk.