The manufacturers arranged for some cheap steel bushings, but they haven't gotten around to revising the end plates so they can't be used for proper bearings. Give 'em time. They will get around to it.

That's what I figured as well. Every one I have worked on it was if they were made for bearings but were just not fully machined to any level beyond what it took to get the bushing assemblies to stay put with.

As for revision I don't think they care given very few people would ever put the effort into machining them to fit. Just the handful of cheap guys like me who have a lathe and hate throwing out a perfectly good motor because some 10 cent bushing wore out.

Pretty sure I have around a dozen assorted 48y frame and similar variant fan motors now that are that way and ready to be converted to bearings if I ever get around to it.

 

Have to stick up for Max here, every electric gate I ever worked on had exactly that arrangement and the same cam be said for the vast majority of small fan motors...
If you think about it why would a manufacturer fix the rotation if they didn't have to...

I'm pretty sure his reference circuit is for a motor like you say. Garage door openers largely use the exact same setup as well but as for fan motors I have to side with #12 being I have worked on and scrapped many and very few ever were made to be reversible on purpose. Especially on cheap mass production application fan motors.
They only hook up correctly one way and run one way by design to be as dummy proof as they can be since I am sure #12 will agree that intelligence and HVAC technicians is rarely ever used the same sentence or paragraph and maybe not even the same book with more than just a few.

Now lying cheating crooked greedy SOB and HVAC technician... That's like hair on an ape. You just assume they have it until you see otherwise. #12's the hairless ape in my books!

 

I have to side with #12 being I have worked on and scrapped many and very few ever were made to be reversible on purpose.

I don't think I will ever move to North Dakota. Besides the fact that I hate cold weather, when 2 people are exactly the same, one of them is unnecessary.

 

Mystery refrigerant losses that can be years between events.

That's what we use UV dye for. About $16 per cartridge.

 

That's what we use UV dye for. About $16 per cartridge.

you've just said something interesting... mind elaborating?

 

every electric gate I ever worked on had exactly that arrangement ....

As do my garage door opener motors.
Max.

 

you've just said something interesting... mind elaborating?

When a sneaky leak becomes a problem, most A/C people want to sell you a whole new air conditioner because that's how they get the most money in the quickest time. When you want to find and fix the sneaky leak, you buy a dye cartridge, inject the dye into the Freon, and wait a week. Then you come back with a UV lamp and go peeking around everywhere there is a pipe that contains Freon. I don't like the color of the dye. It's a deep red and you're looking for it on a dark, oxidized copper pipe. I would think a UV dye should show up as a dazzling curb yellow or danger zone orange...but it's dark red like a 2 day old blood puddle.

It was only 2 or 3 months ago when I watched an A/C guy tell my neighbor that finding and fixing a leak would cost more than a whole new air conditioner. Well...that's one way to rob the customer. Refuse to do the easy job (braze one pipe joint) for less money than the all day job, replace both halves and the pipe between them.