To replace the Rear Bearing, you will need to partially disassemble the Cast Cutter first.

Disassembling the cast cutter is easy.

Notice the enhanced seam in the picture below

Start by removing the 3 screws from the back end of the cast cutter that hold it together as shown in the picture below

Note: The screws are easy to break off. When they break, it is the heads of the screws that break off (the weakest part of the screw). Carefully remove as many as you can. Then separate the back end from the body of the cast cutter, lifting the back end over the broken screws as shown in the picture below

Removing the broken screws is easy. Simply grab the remaining studs with vice grips and turn them counter clockwise as shown in the picture below. They will come out easily