One of the slots for the bolts that holds the toilet to the flange is
cracked. The flange and drain pipe are both PVC, cemented together. I
tried using this internal pipe cutter to separate the flange. It's item
37516 he
http://superiortool.com/pvc/pvcSaws.html

The idea is that you work the tool around the circumference of the drain
pipe just below the bottom of the flange. The problem is that the blade
is about 1/4 inch too small in diameter to get through the wall of the
drain pipe. (The thickness of the flange wall gets in the way.) A blade
about 1.5" would probably be perfect.

The problem is how to cut through the drain wall completely. The house
is on a slab and the bathroom floor is tiled, so repair kits that work
by slipping stainless steel rings between the flange and the floor won't
work. Zero gap.

The 3" grinding wheels shown here,
http://www.harborfreight.com/catalog...rinding+wheels,
would probably work. (The inside diameter of the flange is 3.25 inches.)
I would have to get an spindle at least 3" long that fits into my
electric drill and extends below the bottom of the flange.

Any other ideas for removing the flange/drainpipe?

Thanks,

R1