I recently had to install a lot of 3/4-in. quarter-round trim. I prefer coped corners to mitered corners, but given the amount of trim required by this job, I had to find an expedient way to cut the stuff. As shown in the drawing, I devised a fixture that yields accurate results with a minimum of effort.
I started with a scrap piece of 2×6 about 14 in. long. Using my table saw, I plowed a 3/4-in. by 3/4-in. groove the length of the 2×6 to accommodate the quarter-round trim. This groove holds the trim as it is cut by a 1-1/2 in. dia. hole saw from above. As shown in the drawing, the hole saw is guided by a 1×4 guide block. I made this block out of oak because it holds up well after repetitive cuts.
Using this rig makes coping quarter-round trim a breeze. For quarter-rounds of a different radius, simply cut a groove to fit the trim, and use a hole saw that is twice the radius of the trim.
M.P. Whipple, Afton, NY