Cd what is that motor ? it looks like a straight up 110V motor ?
The one in a picture that I saw, gave me the impression ( by size and color) that it may have been the type motor used on HI end long arm quilting machines, Those are about as big around as a quart canning bottle, the one's I know of are off white in color. guessing there AC/DC so they would run off a standard pedal
The 12" flywheel vs a 16". I tried this. it will go in there on the big stand but the bolt / screw and lock nut. in order to get a decent adjustment at the wheel the screw head was inside the casting on the frame, I had to put the lock nut inside next to the wheel, it was still a bit sloppy, leaving only a few threads in the frame. so the cranks arm was a bit to short on the home version wheel
Then the pitman arm did line up, this was using the steel pitman type. I checked this morning and now have to wonder if using the wooden pitman type and making a new arm / rod that these smaller wheels might be a go..
The only complete industrail treadle I have is a ww d 12 the punching power is fine, on thick leather I do have the handwheel the first hole, leather as use for chaps ect no problem, by thick i mean leather use in mill aprons halters, and two thicknesses of that. again because of keeping the design and straight lines this is done by hand wheel, Those d12 have a large wheel.
my reason on using a gate valve wheel is size, but The size has to do with ease of reaching over and finding the wheel without looking.. not it's weight a gate wheel would not have a pulley, so using one of those the machine would be handwheel only
I've even toyed with making a wooden hand wheel, it could be made of oak and designed to look like a spoked wheel using a steel hub. no belt.
I have that 31-20 with a wore out race and who knows what else, it sews good at as low speed, under power it skips. if you check prices on 31-20 parts oh boy 3 times of what 31-15 parts are. I think the 20 can be converted to a 15 ??. anyway just thinking of a cheap way of putting this 31-20 back online ..
I can turn 9 1/2" stock in my lathe, it's a metal lathe, but I do turn spindles of the broken ones on cabinets in it, not so easy but doable.