Every year, at least once, I try to refurbish an old shop tool I might find useful. I have an affinity for the old 1930's and 40's cast iron machines. Here I have a much sought after Delta 12" disk sander on an open stand....It's a tough one to find if your the kind of person looking for such things. This example is from 1942. These sanders I suspect had a strong tendency to tip over, they are very top heavy, the motor weighs 80 lbs by itself. They are almost always broken somewhere. Somebody slopped gray paint all over it and it has obviously been tipped over a couple times, but it is very restorable.
The wiring is pretty crusty, the fabric wire insulation is disintegrating. Challenging....I've pulled the shaft and new bearings are on the way.
I had something similar awhile back. Turned it on and all the lights went dim!
I am sure it will be ready for another 100 years once you get it done. Engrave your name and date on it because it will be running long after you and I bite the dust.
I disemboweled the whole thing.....down to every last nut and bolt. I scrubbed it with acid and stripped all the paint off with a wire wheel. The motor is the original bullet motor with the correct switch and switch box cover. The switch and cover usually go missing, after 75 years I'm lucky they present. The wires inside were crumbling....all the insulation was made of cloth, the fibers just fell off. I repaired it....I'm good like that. I installed new bearings and painted it up.
Sadly the motor badge is missing, but you can make new ones. I made a water-slide decal, mounted it on a metal plate and provided the 1942 motor with an identity once again.
I tuned it up and its a sweet sander - I love reintroducing old cast iron to service. I get much joy from the old equipment and the things I make with them. I have a 1950'S Delta Rockwell belt sander next in my queue.