|
On the small, triangular cutting boards, this step is not needed, it is performed only on the larger rectangular boards that are designed to cover most if not all of the sink opening and therefore need a way to scrape the cuttings into the sink below for disposal.
 We start by drilling a hole through the board just inside the diameter line. This hole allows me to insert the blade of a saber saw or jig saw then cut the circle. I stay a bit inside the line so the irregularities of freehand cutting and saw marks can be removed.
 To do that I chuck a sanding drum in the drill press and mount a special attachment to the drill press table. This attachment allows me to sand the full depth of the hole by raising the piece being sanded up off the table a little. I use a coarse grit sleeve on the drum to do the shaping, taking the hole out to the line, then switch to a fine grit sleeve for the finishing work.
 A little hand sanding around the rims to remove any fuzzy bits and take the sharp edge off and we are done. The result is a reasonably round hole with nice smooth sides. I could round-over the upper rim of the hole, but that will just encourage things to fall in. Leaving the lower rim squared off encourages water and juices that run into the hole to drip straight down into the sink, a rounded lower rim would encourage these fluids to run along the bottom of the board for a while first, making more of a mess than necessary.
|
