We have a whole post on how to find a cross in the first place. This one covers the other half of the job: checking a cross that someone handed you.
These days that someone is often an AI assistant. We asked a couple of them for the aftermarket cross to a common Hypertherm® Duramax® drag shield, 220818. Both got the main answer right. One of them also listed crosses from two MIG welding torch brands that don't make plasma shields, plus two part numbers with suffixes that no manufacturer publishes. It all came back in the same confident tone.
A reseller listing, a marketplace ad or a well-meaning counter guy can make the same kinds of mistakes. The fix is the same whoever made the error: check the cross against sources that can't make it up.
Check 1: Confirm what the OEM part actually is
Start with the OEM number and look it up on the machine maker's own parts listing. Hypertherm lists 220818 as a shield, Duramax® and Duramax Lock, 15–85 A, drag cutting, fitting the Powermax45® XP, 65, 85 and 105.
Write down four things:
- Part type (shield, nozzle, electrode, swirl ring, retaining cap)
- Amperage range
- Torch (which torch, and whether it's hand or machine)
- Process (drag cutting, shielded, gouging, fine-feature cutting)
These four are what the cross has to match. If you can't confirm them from the OEM, you have nothing to check the cross against.
Check 2: Find the aftermarket part in its maker's own catalogue
Not a reseller's product page, not a marketplace listing and not an AI answer. Go to the manufacturer's own published catalogue.
A real aftermarket manufacturer publishes its part numbers, the OEM numbers they replace, and a legend that explains its suffixes. Thermacut®'s plasma catalogue does all three. If the cross you were given points to a part that doesn't appear in any maker's catalogue, you can stop there. There's nothing behind it to check.
This check also catches the invented numbers. A suffix like "-A" or "-AF" that shows up in one answer and in no catalogue anywhere wasn't copied from a source. Someone, or something, made it up.
Check 3: Match the four things, and read the notes
Put the catalogue entry beside what you wrote down in Check 1:
- Same part type? A cross from a shield to a nozzle is not a cross.
- Same torch, and the same hand or machine version? Hand and machine shields for the same torch family are different parts.
- Same process? A drag shield doesn't replace a shielded-cutting shield.
- Amperage range covers yours? An aftermarket part can be rated for a narrower range than the OEM part it replaces. If you run at the low end of the OEM range, make sure the aftermarket part is rated there too.
Then read the catalogue notes beside the part. Manufacturers flag the parts that have to be used together as a set. Thermacut's catalogue does this on specific torches, including certain shield-and-nozzle and electrode-and-swirl-ring pairs. A reseller listing or an AI summary can drop that note, or apply it to parts it was never meant for. The catalogue is the only place you'll see it exactly as the manufacturer wrote it.
Check 4: Make sure the maker is real, and that somebody answers for the part
The last check is about who stands behind the part, not the part number:
- Is a manufacturer named? "Fits Hypertherm" with no maker named anywhere is a warning sign.
- Does that manufacturer make plasma consumables? A well-known welding brand is no help if it doesn't make the part in question.
- Can you reach a supplier in Canada who'll answer for it? If the part fails early, you want someone to call, not a seller account that no longer exists.
Faster: use a cross that's already been checked
This is the reason we built our cross-reference index. Every row maps an OEM number to the Thermacut® part that crosses to it, taken from the product data behind the store rather than typed up by hand. The tables are plain HTML that can be read without running any scripts, so they work for a person, a search engine or an AI assistant.
If you know your machine but not your part numbers, the Hypertherm® consumable finder starts from the machine and builds the complete stack for you.
And if the part number itself is what's confusing you, start with how to read a part number.
Hypertherm®, Powermax® and Duramax® are registered trademarks of Hypertherm. TorchandTip.com is not affiliated with or endorsed by Hypertherm. OEM part numbers are used for reference only.
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