I also have a motor just like that. It came off from my industrial sewing machine when I switched over to a servo drive. Still not sure if I like the servo motor as well as the original one. The servo motor is supposed to run at various speeds with full power, of so I have read, but it doesn't. I may put the old one back on.
I hear you on the speed of the original motor. Something about a needle going 3500 strokes per minute makes it hard to handle. The lady I bought the machine from told me it "scared her half to death".
OPEN EYES, OPEN EARS, OPEN MIND
BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE
MY NAME IS BRIAN AND I AM A TOOLOHOLIC