SURPRISE !

Little fans like that should be a dime a dozen. You can also buy a computer style (but large enough) 220v fan for not too much and mount it inside.

This is nice, but keep in mind he needs a 220v fan.

I am going to scrap two CNC machines next week (one is a CNC 20 inch lathe and another is a milling/tapping center) and they might have some 220v fans for the cabinet. I might even have some in the Okuma that I stripped already, let me know if you want me to look it up.

A lot of 220 volt machines use 110 volt fans. The practice is a bit dubious, but a 110 volt fan will run fine on one holt leg and the ground.

I have seen it several times in Welding power sources.

My Syncrowave 250DX even uses that to power the 110 volt duplex outlet on the lower panel for the water cooler.

There is no Neutral wired to my Syncrowave, only 2 hots and a ground.

I was surprised by it but the welding repair guys I know say it is common.

I got to thinking after I closed the machine back up that I should have checked where the wires went ... but as you say I can hook the new fan to the ground/neutral wire and one hot leg if I get a 110v unit . Or I can maybe machine a new bushing/insert to tighten it up . But if I can find a cheap motor I'll go that way . Not critical at this point , I don't use that welder much . It still works , just noisy .

On a Synchrowave 250 the utility outlet is powered by a 120V winding on the main transformer, and I suspect it's the same one a 250DX. Remember that these machines will take 480V input and still give you your 120V utility outlet, something that you can't do if you're improperly using the ground as a neutral.

I checked Suplus Center and Harbach and Rademan. Neither had anything that looked like a drop in replacement.

But suggest you check with the HVAC people in your area. They probably scrap a lot of perfectly good fans. I have a fan and motor from a A/C Condenser that looks to be about right.

Dan