Woodworker's Journal 1993-17-2, страница 41

screws only (no glue) when mounting the base to the brackets and base support. This way. should the need ever arise to replace the rip fence rub strip, you'll be able to effect the replacement without destroying the jig.

Note that in locating the base with respect to the brackets, the bottom edge of the brackets should be just a I ittle over -Vi6 in. higher than the bottom edge of the base. This ⁱ/](, in. allows for the thickness of the rub strip plus a little extra for adjustment so the base can be squared perfectly to the table.

One easy way to obtain this adjustability is to hold a framing square to the base, then mount the base to the brackets so there's just a little space between the top of the base and the square (Fig. 3). You can now adjust the machine scrcw in the connector to zero out the base at exactly 90 degrees. Also, adjust the machine screw in the fence guide so the jig fits snugly on the fence, slides easily, but exhibits no slop. Finally, once again using the framing square, adjust the machine screw in the adjuster block until the work support is square to the saw table (Fig. 4). All three of these adjusting screws should be mounted with a washer and nut: the screw position is locked in position with the nut.

Using a protractor and a sliding bevel, you can scribe index lines directly onto the base at commonly used angles. We show lines at 15, 30 and 45 degrees, which should handle just about all your needs. Although no finish is needed on ihe jig. we rubbed in a penetrating oil finish. Somehow, it always seems a bit more satisfying to use a jig that not only does great work, but that looks good doing it.

Lsing Your Jig

The majority of the times that you use the super jig, the work support w ill be in the vertical position. The De-Sta-Co clamp that's included with the kit will provide adequate holding power for just about all cuts with the work support in this position. When you are using the jig w ith ihe work support in ihe 45-degree position, an extra clamp is strongly recommended, as shown in the photo.

Depending on the thickness of the stock you are working on, you'll need to

March/April 1993 Please circle No. 8 on the Reader Sen il e Card 41

either adjust the spindle on the De-Sta-Co clamp so the clamp provides the proper tension, or if you are working with thinner stock, replace the short spindle with the extra-long replacement spindle (Ql that's included with your hardware ku (see Kit Source). As shown, the jig has the capacity to handle any stock thickness up to 2 in. If you intend to use it for stock thicker than 2 in., you'll need to block up the De-Sta-Co clamp to accommodate the increased thickness (you'lt also need longer machine screws to mount the clamp). In adjusting the De-Sta-Co clamp for the proper tension, keep in mind that the intent is for the clamp to exert enough force to hold the work piece securely; if you have the clamp adjusted for excessive force, you risk racking the work support, especially when it's in an angled position.

To work very thin stock, employ a spacer scrap between the workpiece and the jig base. In the process of using the jig. you'll no doubt eventually cut away the bottom portion of the work support (this area of the work support is cut into when the blade is raised higher than about I³M in.) but ihis in no way effects the function of the jig.

Bells & Whistles

We designed this super jig to prov ide the most bang for the buck. Hence, we eschewed fancy things like Teflon rub strips (instead of the oak we used) and ultra high molecular weight (UHMW) polyethylene adhesive-backed tape on all the wear points. Practically speaking, we'd be hard-pressed to imagine any one wearing our jig out in normal use, but, if you're the type of person who just must have all the latest high tech stuff (or if you are really into jig making), here's a source for both these fancy plastics. It's the United Stales Plastic Corp., 1390 Neubrccht Rd.. Lima. Ohio 45801; tel. 1-800-537-9724. Their Vie in. Teflon sheet maicrial is part no. 47485; the UHMW polyethylene tape (³A in. width) is their part no. 46-46242. The Teflon sheet runs about S30 a square foot, and the tape about S13 a roll, so be prepared to spend the big bucks if you want to customize your jig with these bells and whistles. ^t

Bill of Materials

(all dimensions actual)

No.

No.

Kit Source

A complete hardware kit. including the De-Sta-Co clamp, an extra-long De-Sta-Co spindle and all the hardware that you need to build the Super Tenon Jig is available from Aspen Kits. 6 Hilltop Drive, Old Saybrook. CT 06475; tel. (203) 388-6179. Specify Super Tenon Jig Hardware Kit; price is S27 postpaid (check or money order only, please; Canadian orders add $2). Your hardware kit will include 30 bugle head drywall screws (1V4 in. long; kit includes an extra screw), 10 T-nuts (V4-20), 5 washers (1 of ⁹/ie in. dia plus 2 each of ³/4 in. and 1¹/4 in. dia.), 5 nuts (V4-20), 9 roundhead machine screws (2 screws ¹/4-20 x 2³A in. long plus 7 screws V4-20 x 1¹/2 in. long), 2 plastic knobs (1³/e in. dia. with V4-20 thread brass insert), 1 De-Sta-Co clamp (series 225), and 1 extra-long De-Sta-Co spindle with bonded Neoprene cap (⁵/i6-18 x 3 in. long).

* Widths of base support and fence guide will be dependent on the size of toe notch you cut in the brackets to accommodate your rip fence.

* * Edging should be ⁷fc wide when applied to plywood. Then use flush-trimming bit to trim flush.

**" Hardware is included in kit (see Kit Source).