41 - Fold-Down Drafting Table, страница 26
IN E TOOLS a-32 x 1" brass ^m machine screw h*; ~-_^"r0und0ver (1|ODY I began work on the scratch stock by making two of the main parts: a hardwood body and a sole plate made from a piece of aluminum angle, see drawing. cutter SOLE PLATE (2" x 2" - AVz aluminum angle) cutter The body of the scratch stock serves two purposes. First, it holds the cutter in place. And second, it provides a firm, comfortable grip by incorporating two curved handles. blank. The body (A) starts out as a single blank of 3/4"-thick hardwood, see Fig. 1. Although any hardwood would work, it's a perfect opportunity to use a small piece of highly figured hardwood you've been saving for a special project. (I used bird's-eye maple.) wedge. Regardless of the type of wood, the body is shaped like a wedge. The reason for this is simple. In use, the cutter is held against the angled side of the body. This orients the cutting edge at an angle to the workiece. As a result, the cutter peels off shavings instead of scraping dust. All it takes to form the wedge-shaped body is to rip a bevel down the length of the blank. I set the blade on my table saw to 15° and made a single pass over the saw blade, see Figs. 1 and la. pattern. After cutting the wedge, the next step is to attach a pattern that shows the basic shape of the body, see Pattern on page 27. It's simply spray-mounted to the angled side of the wedge. cut dadoes. With the pattern in place, you'll need to cut two dadoes, see Fig. 2. A narrow dado on the angled side holds the cutter. And a wide dado on the opposite side accepts the aluminum sole plate, see Fig. 2a. Note: To ensure a good fit, it's best to have the cutter in hand. I body a-32 knurled nut s-32 washer #6 x Vz" Fh brass-plated woodscrew CROSS SECTION NOTE: tilt saw blade to 15° push block ^^ / zero-waste / clearance /^n. insert fence waste NOTE: x body is made from 3/4"-thick / hardwood BODY, (1%" X 12") FIRST: add pattern to angled side of body ^--auxiliary fence body ^SECOND: cut dadoes _ centered on length of body cut to match width ' of cutter blank SECOND: sand edges OF BODY SMOOTH FIRST: cut body to shape body THIRD: round edges of handle with rasp (see drawing above) 26 ShopNotes No. 41 |
