When a part on a filling, labelling or wrapping line fails, the question is rarely “OEM or aftermarket” in the abstract. It is more practical: which option gets the line running, at a cost the budget can absorb, before the stoppage costs more than the part. Here is how buyers we work with actually compare the two.
What the two words mean here
An OEM part is supplied by, or through, the machine maker. An aftermarket part is made by another manufacturer to match the reference number — the same shape, material and fit the machine was built to. JP Machinery supplies aftermarket compatible replacements; we are not the machine maker and do not represent it. The number on the part is what makes the two comparable, because it defines the shape and size both are built to.
The three things buyers actually compare
| Factor | OEM | Aftermarket |
|---|---|---|
| Unit cost | OEM parts are priced on the machine maker’s schedule, not the open market. For common wear items this is often several times the aftermarket price. | Built to the same reference, without the machine-maker margin — typically a fraction of the OEM price for seals, bearings, belts and fasteners. |
| Lead time | When the number is stocked, fast. When it is not, the wait follows the machine maker’s production and can run to weeks or months. | A supplier who already holds the reference can often quote and ship sooner, because the number is matched from a catalogue rather than a back-order queue. |
| Discontinued numbers | Machine makers retire numbers as models age. Once a number is out of the catalogue, OEM supply simply stops. | A supplier who cross-references can still match the old number to a current replacement — the identification survives even after the original listing is gone. |
Where aftermarket clearly wins: the number that no longer exists
The single biggest reason buyers call us is a number that the machine maker no longer supplies. The part still exists; only the listing has changed. Because the reference number defines the part, a supplier who can cross-reference — match your old number to the part that fits now — can often solve in a day what an OEM back order cannot.
What does not change
Fit and material still decide whether a part works. A responsible aftermarket supplier confirms what the part is and which position it fits before quoting, tells you when your number has been superseded, and is plain that the parts are aftermarket replacements built to match the reference — not originals from the machine maker. Identification is the whole point of the number: it tells everyone which shape and size is meant.
How to decide for your line
Start with the number on the part, the drawing, or the machine spare-part book:
Not found, or not sure the number is current? Send it to us — we check it against the catalogue and reply with a quotation within one business day.
All brand names, trademarks, and model numbers mentioned on this website are the property of their respective owners. Their use is for identification and reference purposes only. JP Machinery supplies compatible spare parts and is not an authorized distributor or representative of KRONES, SIDEL, KHS, SACMI, or AROL.