35 - Revolving Tool Station, страница 7
FINE TOOLS *tent from one recess to the next, I used a hand-held router and a simple jig, see page 26. plumb vial. After routing each recess, you're ready to add the vial near the end of the level that's used to check whether a vertical surface is plumb. (For sources of vials and other hardware needed to build this level, see page 31.) The plumb vial fits in a stopped hole that's drilled in the bottom edge of the level, see Fig. 1. (One of the brass plates will cover the hole when it's added later.) To produce an accurate reading, it's important that this hole is perpendicular to the bottom edge of the level. So start by checking that the table on your drill press is square to the bit, see margin at right. Then drill the hole using slow, steady pressure. window In addition to the stopped hole, a large hole drilled • through the sides of the level creates a "window" that lets you see the vial. (I used a Forstner bit to make a clean cut.) STEP1: ROUT LONG RECESS FOR COVER PLATE level vial. At this point, you can turn your attention to the top vial that's used to level a horizontal surface. To provide a clear view of the level vial, there's a semi-circular opening in the top edge of the level. Here again, a Forstner bit produces a clean cut. Even though it's designed to drill a hole on the edge of a workpiece, I still wanted to provide extra supportto keep the bit from wan- 3A" RADIUS NESS OF dering. So I clamped a short scrap piece across the recess for the cover plate, see Fig. 2. champers. The scrap comes in handy for the next step as well — routing an Vs" chamfer around the rim of the hole on both sides, see Figs. 3 and 3a. While you're at it, chamfer the view window near the end of the level too. install plumb vial. Now all that's left is to install the plumb vial. To do this, simply press the vial into the hole, see Fig. 4. FLIP WORKPIECE AND ROUT SHORT RECESSES FOR WEAR PLATES 2"'' SECOND: DRILL 1"-DIA. HOLE FIRST: DRILL %"-DIA. HOLE Me" DEEP DRILL 1"-DIA. HOLE FOR LEVEL VIAL NOTE: LOWER ASSEMBLY OVER BIT TO ROUT CHAMFERS LEAVE SCRAP PIECE ON TO CHAMFER OPENING FOR LEVEL VIAL VIEW WINDOW CHAMFER . BIT To ensure that the drill press table is square to the bit, use a square to check it in both directions. No. 35 ShopNotes 7 |
