39 - Modular Wall Storage , страница 14
When it comes to laying out a joint, it's hard to beat the accuracy you get when using a marking knife. That's because the blade on a knife scores an extremely fine line, see photo at right. So unlike a thick pencil line, you know exactly where to cut.
Although there are a number of different knife blades available, I used a short, laminated steel blade. The metal on this type of blade is extremely hard. And the edge stays sharp for a long time. (For sources of blades, refer to page 31.)
The only drawback is these blades are too short to provide a comfortable grip. (The blade I used is 2V2" long.) But by enclosing the blade in a wood body, I made a marking knife that's easy to use.
body. The body of the knife consists of two parts: a handle that holds the blade securely in place, and a cap that keeps the edge from getting nicked. Both of these parts are made from a single 3/4n-thick blank. (I used bocote.)
The first step is to resaw the blank into two pieces of different thicknesses, see Fig. 1. Later, a recess wall be cut in the thick part to hold the blade. This way, when the thin part is glued back on, the blade will automatically be centered in the body of the knife.
RESAW BLANK INTO TWO PIECES
NOTE: BLANK IS 3/4"-THICK HARDWOOD
NOTE: ATTACH SANDPAPERTO FLAT SURFACE
SAND OFF SAW MARKS
each one smooth, see Fig. la.
lay out recess. Now you're ready to lay out the recess for the blade in the thick piece, see Fig. 2. The thing to be aware of here
sand faces. After resawing the blank, the inside face of each piece may be a bit rough. Since this might keep the pieces from fitting tightly together, I sanded
k A hardwood with a dramatic grain pattern (like the bocote shown here) is an ideal choice for the wood body of this marking knife.
CLEAN UP EDGES
ROUT RECESS (SEE PAGE 30)
^ NOTE: LAYOUT
LINE EXTENDS 5/i6"PAST CUTTING EDGE OF KNIFE
14 ShopNotes No. 39
— DRILL 1/2" HOLE TO MATCH THICKNESS OF MAGNET (SEE DETAIL)