Dealing with a bowed drawer side
Bill Tindall, E.Tn.
So one does all one can, picking a stable wood, selecting at least rift cut, flattening before planing and still a bowed side shows up from time to time in the finished drawer. I have come to recognize this problem. By all external evidence the drawer has been properly fit but it still does not work smoothly. The cause may be a convex bowed side. The front and back seem to be fit perfectly, but the side will drag internally.
How to fix? The ruler trick. If the side is planed as usual the flex of the side straightens the side under pressure from the plane and the bow never gets removed.
But if a ruler is stuck under the bow this high spot will remain high as the plane passes by and it will get mowed off. Note for planing sides I just drape the drawer over whatever piece of wood approximately fits the opening, in this case a salvaged top of a long ago made sewing cabinet.