The working face of the right-angle reamer for cutting pvc semicircular trunking is the side edge.

If you want to smooth the bottom, you need to smooth the ground with a milling cutter. Reusing the reamer will leave a small step.

At present, reaming milling cutter is generally used to replace the above processing. Drill the bottom hole with a drill bit, leaving a margin of 0.2-0.5, and then directly process it with a reaming milling cutter, and the bottom plane will be relatively flat.