Sunkko 73B Mobile Spot Welding Pen Type O plug size

rivahmon

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Joined
Mar 20, 2025
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Location
Eastern Virginia
Hello all. I just discovered this forum and am starting to glean all a lot of great information.

I have ordered a Docreate 3000F spot welder and really can't find anything online from the manufacturer. Haven't even found a site for Docreate. Nothing is known yet as to output jack size.
I would like to fit a Sunkko 73B pen and need size of plug. There are 4 possibilities that I know of: XT90 4.5MM, XT150 6.3MM, unknown 5.5 and 8MM.

Thanks in advance for any help and for all you do here.
 
If there's no info about the welder, then you'll have to wait until it arrives and see what connectors it actually has on it, before you order parts to connect to it.

You may find that it's wiring / connectors / etc are insufficient and have to be replaced anyway, so you could then order your prefered connector on the pen and then matching connectors / wiring / etc to install on the welder.

In a google search for the phrase "Docreate 3000F spot welder" there are pictures of connectors, leads, etc that you could use to visually match to other connectors, if they didn't use something custom. I can't tell offhand which connector they are. I didn't read any of the many ads for them, so there may be other useful information in them or in the reviews on some of the sites.

There are only four hits on this forum for the brand, including this thread, and none of them have the info you want. One does mention the machine has no protections (asks how to add them) and has internal pictures of the machine.
 
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