82 - The Complete Miter Saw Workstation, страница 34
securing the fence to the Beam ▲ Drilling the Fence. Secure the fence and drill a hole in the top to the hole in the face of the fence. THREADED IN DOWEL PLUG At this point in the process, the fence is nearly complete. All that's left is to add a studded knob that locks the fence in place on the beam. After that, you'll move on to making the beam, a couple of knobs, and the cutting pin. Installing a Threaded Insert. A simple way to secure the fence to the beam is to use a threaded insert and a knob. To do this, I first drilled a hole in the top, as you can see in the first photo at right. An important thing to keep in mind when installing a threaded insert is to keep it square. I've found that using the drill press with the power off is a foolproof way to do the job. The right photo shows how it's done. The fence is now ready to accept the knob. I made matching knobs from the same aluminum rod used for the beam. You can see the details in the box on page 35. To prevent the end of the threaded knob from gouging the beam, I cut a wood plug from a dowel and slipped it into the hole in the face. MAKING THE BEAM Now you can set the fence aside for a bit and turn your attention to A Threaded Insert. After drilling the hole, use the drill press to drive in the insert into the fence. making the beam. The beam itself is pretty simple. It's just a piece of aluminum rod. (You'll find sources for the aluminum on page 51.) One end of the beam is drilled and tapped to accept a studded knob that holds the cutter in place. The trick to drilling round stock is centering the bit on the work-piece. To accomplish this task, I made a simple V-block. This holding fixture is nothing more y2" x Vz" ALUMINUM ROD SIDE VIEW LARGE uiitiiwwwiWmmt) inmuminini^innW %" x %" ALUMINUM ROD J Ve"x 1" STEEL ROD #10-32 x 15/i6" THREADED ROD 3/ie" THREADED INSERT CHAMFER EDGE OF HOLE Vz" x '/z" ALUMINUM 3/W' x 1" THREADED ROD %" x %" - DOWEL PLUG (—* i/z" x 6" ALUMINUM ROD KNOB 3/ie" x 11/e" THREADED ROD 3/i6" X VA" STEEL ROD #10-32 THREADED INSERT 3/e" x 3/e" ALUMINUM ROD #10-32 x ,3/i6" THREADED ROC SIDE VIEW SMALL %" x 4Vz" ALUMINUM ROD Va" ROUNDOVER ALL EDGES CUTTING PIN s/ie" x W DOWEL PLUG 34 ShopNotes No. 82 |
