I am building interior wooden cills and from a 3m x 250mm board/plank (25mm thick) I need to remove a rectangular section about 50mm thick along most of its length, giving something like:
I have a circular saw and jigsaw but no plunge saw or table saw or router, as well as regular hand saws and a multitool (ugly but useful). I am happy to acquire more hand-tools but ideally not expensive power tools for one job.
What is the name of what I'm trying to do, and what would be a good technique? I have 3 of these to make.
Best Answer
If you feel safe doing so, start a plunge cut with the circular saw into the long section and cut out most of the length. Then finish off with a hand saw.
If you don't feel safe plunging with the circular saw then you can instead cut out a part only the length of the diameter of the saw blade by hand, then extend the cut with the circular saw.
To make that start you can make a series of cuts along the side and then snap off the little tenons that remain with a hammer. Then it's a matter of cleaning up the remaining surface and extending the cut as above once the circular saw fits in.
You've indicated that you have a jigsaw available, because they can cut along a reasonable sharp curve that can be used to make either the initial notch for the circular saw, or even the entire cut. After that it's only a matter of cleaning up the corners (and the cut itself depending on how steady you where)