Part I of this Side Round serial may be found here.
When addressing the idea of side rounds the immediate question is often: "Does one need a series of side rounds in the same manner that one needs a series of rounds?"
The answer to this question is "No."
There are, of course, many different arcs and radii that may be included in a final moulding profile. Individual hollows and rounds are used to cut those same arcs and radii. Therefore, many rounds may be ideal.
Though hollows and rounds are used to make a specific circumference, they should not be used to set that same arc of a circle down, into wood.
The shape of the rounds' body will preclude it from reaching into the absolute corner.
These instances are where the side rounds comes into play. The side round will establish the transition point where this particular profile changes from convex to concave.
The side round often only creates clearance for the appropriately sized round while establishing that transition point.
As such, a comprehensive series of side rounds is not necessary because the profile they create is not often included in the final profile, only the transition point and clearance they create is.
I make two sizes of side rounds as standard:
These side rounds may be used for creating clearance for a wide range of rounds.
Further information may, of course, be found here.