Woodworker's Journal 1994-18-5, страница 47
2'A"-dia. knob with through hole and 'Ax 16 threaded insert 7ex<3"-16carriage bolt VA"- thick clamp caul /r"-dia. counterbore 3/3"-dia. f3ase Drill one end of the slotted hole, then flip the caul around so the opposite end rests on the shim block, and reclamp. Then, drill the opposite end of the slot. The dotted lines on the full-sized pattern indicate the ends of the slot. Reposition the caul as necessary, then bore multiple, overlapping holes to clean out the waste between the two end holes. Now, make the second caul. If the drill bit doesn't clean out all the waste, use a chisel to pare and smooth the walls of the carriage-bolt slots. Next, test a carriage bolt in the slots, and adjust the slots if necessary to make them fit. Then, sand the cauls to remove any splinter> or sharp edges. The Hardware The jig requires two knobs with through holes and Y," -16 threaded inserts, two %x8"-I6 carriage bolts, and two flat washers. You should be able to buy the hardware at a well-stocked hardware store. How To Use The Jig Simply position the carriage bolts and cauls as needed to securely clamp the stock you want to cut. Elevate the table-saw blade about Y" higher than the workpiece, then advance the assembly along the rip fence. Once you've made one straight edge, remove the jig, and reposition the rip fence for the desired width. Next, position the just-cut straight edge of the workpiece against the rip fence, and rip the opposite edge. Voila! You now have a board with parallel edges. Safety Note: The combined weight of the jig and w orkpiece may be too heavy to hold on the saw table after clearing the blade. For safety, always use an outfeed table or support system when working with the jig. You may also need to use an infeed table or support, depending on the length of the stock being cut. kVJl Hardware Kit Source Includes two large knobs with through holes, two 8"-long carriage bolts, and two washers. Order from: Aspen Kits 6 Hilltop Drive Old Saybrook, CT 06475 Telephone: 203 388-6179 Kit price: $9.95 postpaid (send check or money order only, please). Photograph: Michael Gellatly Illustrations: Cad-Co and John Ingles Wtxxhuorker's journal September/October 1994 47 |
