You are right, it is a repulsion induction motor. It came off a WWII era Sears table saw. I used the saw in the early 1970's and something broke on it which I couldn't fix at the time so I salvaged everything I could off the saw and disposed of it. I used the motor on one thing or another over the years but haven't used it in more than 20 years. This week I bought a antique woodworking bandsaw that didn't have a motor so I planned to use this one. I plan to restore the bandsaw so I hate to use a motor with a big hole in it. This is behind the repair. The two cast pieces missing are 2 1/4" straight across the break but if measured around the contour measure 2 1/2". I think I could make the pieces out of 1/4" steel without too much trouble. I was just unsure about welding steel to cast. I believe that end of the motor wouldn't be too much trouble to get off but I will have to double check.