Sourcing a spare part: start with the number you really have
The machine is standing still while you look, so the number in your hand is not a detail — it is the afternoon of enquiries you have already booked. Five minutes on which number it actually is saves that afternoon.
The machine is down
The number in your hand is probably not the number you need
The component is out, a code is stamped into it, and the search returns nothing. Very often that code belongs to the machine builder rather than to the company that actually made the part — and the original is usually cheaper, more widely stocked and better documented.
The machine plate is the way back. Under Annex I, section 1.7.3 of the Machinery Directive 2006/42/EC it must carry the maker and address, the designation, the CE marking, the type designation with the serial number and the year of construction. The last pair fixes the design state, and the design state fixes which parts list applies at all.
One identifier regularly costs an afternoon: a serial number is not an ordering identifier. Exactly one specimen exists and it has already been delivered.
- Look for a second marking on the component itself — moulded, etched or a small plate
- All 114 items here carry a part number on the variant, and the search reads it directly
- A search for 1.4404 returns five hits, PT100 two, 316L two
The order that works
Five attempts, sorted by probability of a hit
Each step is worth trying before the next one, because each is more specific than the one after it.
The component manufacturer’s part number
Read from the component itself, not from the machine. This is the single most reliable key in industrial supply, and it is the one our search index matches without any interpretation.
The pairing of manufacturer and number
The same string can mean two completely different things at two manufacturers. A number without a manufacturer is half a key. If you have both, you have the strongest search you will get.
Machine type, year and parts list
Where the component carries nothing readable, go back to the machine plate. Type designation and year of construction lead to the parts list for that design state; the position number in that list leads back to a manufacturer part number.
Dimensions, material and function
For seals, bellows, sight glasses and filter elements this often works better than any number. Measure the fitted part rather than the seat, note the material and the medium, and search on those.
Ask with a photograph and the mating part
The last resort is also the most underrated. A picture of the failed component next to a scale, plus what it seals against or screws into, resolves cases that no number resolves. Our contact form has a product topic for exactly this.
What really costs the week
In most delayed cases the bottleneck was a document, not a part
An inspection certificate 3.1 under EN 10204 rests on tests tied to a specific order. Ask for it after manufacture and it can no longer be issued for the batch you have. The part then sits in goods-in waiting for a release, and nobody involved made a mistake.
Deciding on the paperwork at enquiry stage costs one sentence. Here the answer is short: no item is supplied with an inspection document today, and shukchok, an open marketplace for industrial goods, is exactly where that changes — whoever issues those certificates lists here and keeps them on the item.
The second recurring delay is the stocking decision. Critical spares consume irregularly by definition, which makes every consumption-based forecast worthless for them.
- Decide on certificates before manufacture, never at goods-in
- Stock against replacement lead time and cost of standing still, not against last year’s usage
- Wear parts with a known mechanism belong on the shelf even at an unimpressive annual figure
Seven codes
What each identifier actually identifies
They are routinely used interchangeably, and they are not interchangeable at all. The last column is the one that matters when a machine is down.
| Identifier | What it identifies | Usable for ordering? |
|---|---|---|
| GTIN / EAN / UPC | A trade item as registered by its brand owner with GS1 | In consumer goods yes, in industrial supply rarely — and not here: no item in this catalogue carries a barcode, one carries a GTIN in a metafield |
| Manufacturer part number | The article type at the company that made it | Yes — the strongest key there is, in combination with the manufacturer |
| Distributor article number (SKU) | The article in one seller’s system | Yes within that seller. All 114 items here carry one, and the search matches on it |
| Type code / configuration key | A configured variant of a product family, encoded position by position | Usually yes, once decoded against the manufacturer’s key |
| Serial number | One individual specimen of an article | No — exactly one exists and it has already been delivered |
| eCl@ss / ETIM class | A product group and its characteristics for catalogue exchange | No — it describes a class, never a specific article |
| Commodity code (HS) | The customs treatment of the goods | No, but it is on all 114 items and is what makes duties calculable before you order |
Before you write
Eight details that turn an enquiry into an answer
With these in front of you the reply usually comes in one round. Without them it becomes a conversation.
- Manufacturer and type designation of the machine, from the type plate
- Year of construction and machine serial number — they fix the design state
- Every marking on the failed component, including numbers that look like the machine builder’s
- Measured dimensions of the fitted part, not of its seat
- Medium, operating temperature and pressure the part has to survive
- A photograph of the component and of what it mates with
- Quantity now and expected annual usage — that changes what makes sense to source
- Whether a certificate is required, decided before rather than after manufacture
The deep shelves
Categories where the wear parts sit
Asked with a line stopped
Six questions from the maintenance desk
I only have one number — how do I find the matching part?
Is the number on the component the manufacturer’s or the machine builder’s?
Can I search by GTIN or barcode here?
What do I do if the part is no longer made?
May I fit a part from a different manufacturer?
We make wear parts ourselves. Can we offer them here?
Two ways in
Put the number into the search before you write an email
Part numbers, material designations and type codes all go into the same field, and the price stands at the position without a login. And if the part everyone is looking for comes off your own machines: the shelf here is open, and it costs you nothing to occupy.