I'm thinking that at 3/4 hp, that it is probably a 1/2" spindle.
HF, Powermatic, General and Shop Fox: 1/2" spindle shapers are 1 hp.I couldn't find any of theirs that were 3/4 hp, so not saying there weren't...
Grizzly, Delta and Sears Craftsman had 1/2" 3/4 hp models. The table size also matches those 3.
If you find a spindle adapter for 1/2" router bits... you can save money on tooling. If you use a shaper cutter head that accepts a set of replaceable blades, like for a molding cutter head, you can save on tooling.
Just note that 1/2" spindles are not that common these days for a spindle shaper. Most you find (on the small sizes) nowadays will be for a 3/4" spindle, where you'll have to use a 1/2" to 3/4" adapter. But note on that is that 3/4 hp would be pressed to drive some of the larger 3/4" spindle cutters.
Still searching for you... Was it a single speed reversing or 3-speed? If you can post pictures of what you have... That would help with an ID. Even if not, they are fairly basic in how they go together and maybe that would help in describing how to get you going with that...
"Don't worry, I saw this work in a cartoon once."
"Usually learning skills and tooling involves a progression of logical steps."
Last edited by MAFoElffen; 02-07-2015 at 02:45 PM.