I found an old horizontal mill in a welding shop in Alberta, and brought it home for almost nothing plus about a billion dollars in gas. It doesn't match any of the models on lathes.co.uk under Denbigh, does anyone know anything about it? Looks like it was originally driven from an overhead lineshaft, and has been converted to a 1.5HP motor with a pulley reduction to the countershaft such that there's about 5HP at the countershaft going about 500 rpm. It's got the 3-3/8 overarm, so it's at least older than 1956. The dividing head it came with was made by a company in New York that went out of business around 1925.
Someone in the past had painted the ways, making it hard to operate, but perfectly preserved the metal underneath. A few good days with some paint stripper, and I have a nearly unworn, 90 year old milling machine.
I posted my progress with it on another forum but decided to harvest the text and pictures so I could more easily share it elsewhere too, I thought I'd post it here in case someone had more information about the thing. I've had to strip it to it's components to remove the industrial mud that formed from nearly 100 years of dust laying on well oiled surfaces. Every oil hole was clogged, but it all seems to have nicely preserved the thing. It just sat there, unused, preserved by industrial fruitcake, for decades. I took a stab in the dark by comparing to other plain bearinged lathes to try to guess on adjusting the spindle, and decided on 0.0015" side and end play to allow for an oil film. There's a bit of scoring on the thrust surface of the front bearing that seems to have raised some material that I may need to scrape down, 0.0015" of end play gives me 0.0035 or so side play. Because of this I'm using a thicker oil in the front bearing and a thinner oil in the rear bearing. Some guidance there would be greatly appreciated.
I'm using an iso32 AW series hydraulic oil in the spindle, which seems to be working well. I can't decide on belt tension though. I've gone with just enough tension so there's no slipping while the spindle comes up to speed after the motor turns on, but I'm worried about side-loading that bearing so much. Maybe it's nothing. It's definitely not exceeding the bearing's PV with that tension.
I've since dissassembled the vertical head and reshimmed the bevel gears to give correct tooth contact and solve a huge howl it used to have. Next thing to do is strip and install the overarm bar and re-cut the rusty taper on the milling arbor. Gotta make an ER chuck for the horizontal spindle too so I can use those same collets in either spindle. I also need to take apart and clean that dividing head, and make a chuck adapter for my chucks, but it's operating like it's new. Barely used. The power feed is too fast for use with normal sized endmills, it's like it's designed for a 16 or more tooth milling cutter. I might put an additional electric motor on it and slow it down.
Thoughts? I've not seen this model anywhere on my internet searches.