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OVERARM PIN ROUTER
Setup and Features
Router Bits
Routing System Safety
Special Cautions on Materials & Techniques
Routing System Operations
Edging
Decorative Surface Cuts
Moldings
Mortising
Joinery
Duplicating
Building Fixtures
Repairing Furniture & Veneers
Fluting
Using Drill Press Vise to Hold Workpiece
Under Table Operations

Shopsmith Ovararm Pin Router
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Edging

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Figure 22-5. Notice that workpiece (A) has only a portion of its edge removed, while workpiece (B) has the entire edge removed.

This process is used most frequently in the construction of furniture and cabinetry. And although the shaper is an excellent tool to use for the job, the high operating speed of the routing system can often produce cuts so smooth that they will seldom require sanding.

To begin, there are two types of edging operations (Figure 22-5).

Full Edge Removal-First, there's the type where the entire edge of the workpiece is removed.

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Figure 22-6. When removing the entire edge of a straight workpiece, use a fence to control the depth-of-cut.

This operation is performed with unpiloted bits and requires the use of a fence (Figure 22-6) or guide pin to limit the depth-of-cut and keep it consistent along the entire edge.

When working projects with straight edges, it's best to use a two-piece fence or a guide strip to control your depth-of-cut.

Remember that if you're using a two-piece fence for this operation, the infeed side of the fence is adjusted to control the depth-of-cut while the outfeed side is ad-justed to provide support for the stock after the cut has been made (Figure 22-7).

Keep in mind that in order to remove the entire edge of a workpiece, the bottom cutting edge of the bit will have to pro-trude below the workpiece.

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Figure 22-7. Note that during full edge removal, the outfeed side of the two-piece fence is set forward of the infeed side to provide support after the edge has been removed. Note: Offset is exaggerated for clarity.

To perform this operation without routing into the top surface of the table, be sure to position the table so the bit protrudes down through the hole in the table plate or the table insert during operations.

When working against a fence, always make the cross-grain cuts first, followed by the with-the-grain cuts to cut away any tearouts or splintering. Don't try to make your cuts in a single pass. Always take multiple passes to achieve the cleanest cuts.

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Figure 22-8. Removing the entire edge on a round project is easiest by using the guide pin or starter pin as a central pivot point and rotating your workpiece through the cut.

When removing an entire edge on a round project such as a plaque or wheel, you can control the depth-of-cut by drilling a shal-low hole in the center of your circular workpiece (on the back side) that can be dropped over an offset guide pin or the starter pin and used as a pivot to rotate the stock through the cut (Figure 22-8).

The final way to control the depth-of-cut when removing the entire edge of a workpiece is with a fixture. This process will be explained later in the chapter.

Partial Edge Removal-This is the simplest of all edging operations since it is usually performed with piloted bits that control the depth-of-cut during operations on straight or irregular-shaped workpieces.

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Figure 22-9. When removing the partial edge with a piloted bit, rest the workpiece against the 1/4" starting pin and ease the stock into the rotating bit.

If you're using a piloted bit, fences and fixtures are not necessary. Just ease your workpiece into the cut by resting it against the 1/4" starting pin, then guide it against the bearing or solid pilot of the bit (Figure 22-9).

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Figure 22-10. When decorating the partial edge of an irregular-shaped workpiece with an unpiloted bit, simply guide your stock against a guide pin that's been aligned with the router bit.

If you want to remove only part of the workpiece edge and have no piloted bits, you will have to use fences to control your depth-of-cut on straight-edged projects.

In those cases where you're using unpiloted bits on circular or irregularshaped stock, simply use an undersized guide pin to control your depth-of-cut. The guide pin should be centered under your bit during this operation. Then, merely press your stock firmly against the pin as you rotate it through the cut. The depth-of-cut can be changed by altering the size of the guide pin (Figure 22-10).

Continue to Decorative Surface Cuts
Back to Routing System Operations

 

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