Shopsmith 555970 manual A typical screw-downfixture, lower left - and the projects made with it

MARK V – MOUNTED OVERARM PIN ROUTER 555970

ample fixture shown in Figure 10 will produce two different sized oval picture frames, one oval plaque and a rectan- gular picture frame with an oval opening . . . all from a single workpiece.

Figure 10. A typical screw-down fixture

(lower left) — and the projects made with it.

CAUTION

Be sure to use screws to hold every piece of stock that will be separated when you make your through-cuts. If you fail to do this, once these cuts are made, scrap stock could be caught by your rotating router bit, causing a dangerous kick-back. This does not apply to the outside scrap piece that may be removed after you make your first cut.

NOTE

When using screw-down fixtures for mass- production, it’s a good idea to use your original fixture to make several more of the same design. This way, you won’t be con- tinually removing and replacing work- pieces to make different types of cuts with different profile bits.

2.Clamp-in fixtures . . . are best used when the outside profile of the product you’re building is already cut, since any cut- ting on outside edges will damage the clamping device (See Fig. 11).

In our example, we’ve used a clamp-in fixture to cut out a coach lantern that just happens to have straight, square outside edges. This fixture features at- tached sides that form a perimeter around your workpiece (protruding above the surface of the fixture, not quite as high as your workpieces will be thick) . . . and uses a straight, wooden clamping bar on the left side that’s clamped down with thumbscrews threaded through ordinary drive-in T- nuts.

Figure 11. A typical clamp-in fixture and

the project made with it.

As an alternative to this side clamping method, the clamp could just as easily work from the top of the fixture, as long as your clamping device won’t interfere with your cuts.

3.Profile fixtures . . . are used for shaping edges only, such as candle sconces or the tops of picket fences (See Fig 12). This type of fixture features protruding screw or nail tips which help hold the workpiece in position in the fixture and

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