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After it cures it toughens up and will secure wire placement, as well as insulate.

It has nothing to do with the coil overheating.

Russ, thanks for the tip about the 24646 switch! IIRC, speed coil rebuilds are $150-250, if I’m not mistaken? Anyone on the forum who does those?

1918-19 Manufacture.

Someone before me did that - honest 😁 It looks and feels like the stuff bare tool handles are dipped in for a rubber-like grip. I can’t see enough of the coil to determine how far into it the red stuff has penetrated, though.

These are very nice little fans.

It dates 1917 manufacture.

Cast iron.

Is this type 155 gearbox cast iron or pot metal?

Evan....here is both of mine Type 155. One has the detachable gearbox and one is cast directly to the back.

If the fan is running as it should with three distinct speeds and your coil is super-hot, the coil windings MAY be shorting internally due to magnet winding insulation breakdown from age. The BIG motor 12" 6 pole Emersons (19666) run on roughly the same wattage as the smaller motor 12" 4 pole 24646. It is possible to swap the coils from type models such as the 24646. You would want to test the 24646 coil/switch outside of the fan before you install it to see if it is a good donor and see how hot it gets. This is a way to cheat a rewind. Or, you can pay someone to rewind your speed coil.

My eyes aren’t the best but what’s the red stuff on top of the coil? Is it thick? Preventing the normal warmth from dissipating and causing the stack to heat up? Just brainstorming.

Are you looking for a wiring diagram? A general wiring diagram for a 3 speed fan with a coil/choke in the base (as opposed to being wound into the stator coil) is found in John McComas’ reference guide off the old site:

Lane, thanks for the confirmation something is wrong. Any tips on where I should start trouble shooting - is this a known issue on speed coils?

The speed coil should not get hot. It’s an induction coil not a pure resistance coil like on a DC. . Perhaps warm, but not hot. Something is going on.

Take the rear cover off, there should be nuts on the motor studs. If you remove them the whole stud should slide out the front releasing the cage.

Anyone know about the really hot speed coil issue? Anyone? Bueller…

Pictures? And specifically what help do you need??

It definitely needs a bath and probably a long drink of oil (I see no visible oil-holes), and have no idea how to get started on it. It spun up just fine when I plugged it in, though!

Nice Job! I really like the blue.

This custom fan would be a great candidate to test , it has a .5 capacitor stator , new speed coil with a 71666 blade . I’ve ran it for hours already with no issues , high speed is a wind machine with the higher rpm, low speed is less than 400 rpm

Billy Skolfield in the flesh.

Good job Bill. I came to the same conclusion years ago about the Emerson 12 & 16" APG fans. Mike Coup of Vornado had quite a setup for measuring fan capacity & efficiency. They demo'd it to the AFCA members years ago when we had Fan Fair in Wichita. You can also find testing by GE labs back in the 1940's using weight scales and suspending the whole fan facing downward and measuring weight change based on air flow thrust. I always thought that would be an easy setup to compare all different styles of fans by measuring watts consumed and change in weight caused by thrust. Sorry, I could not find the picture of the test setup, but I did find one of Stan's boy doing some testing...

Anyone out there have the 12" Westy residence 6-pole 6-wing stationary tank Style # 133582 wound for 200-230 volts??