Shopsmith 555970 manual Making Rabbet Cuts, Using Non-Pilotedbits For Decorative Edging

MARK V – MOUNTED OVERARM PIN ROUTER 555970

USING NON-PILOTED BITS FOR DECORATIVE EDGING

This method is basically the same as for decorative external or internal edging with a piloted Bit. However, since these Bits have no pilot to control your lateral depth-of-cut, you’ll have to rely on a Guide Pin (of a smaller diameter than your router Bit) to control this for you.

One half the difference between the Guide Pin diameter and the outside diameter of your router Bit will be your lateral depth- of-cut.

If using a smaller Guide Pin fails to produce the desired results on a piece of scrap stock, set the machine up so the Guide Pin and the Bit are offset about the same distance as the lateral depth-of-cut you want.

Re-position the edge of the workpiece against the Guide Pin, turn on your router motor and gradually move the workpiece from the Guide Pin into the Bit, taking a very light pass as first.

round workpieces, build a special V-shaped Fence like the one shown in Figure 25 below.

Figure 25. A shop-made, wooden

V-shaped Fence like the one shown here is used for edging round workpieces with non-piloted router Bits.

MAKING RABBET CUTS

Rabbets are edge or step cuts for such things as the inside back edges of picture frames (See Fig. 26).

NOTE

Since the bit and Guide Pin are not in per- fect alignment during this operation, it’s important that you always keep the workpiece in the same plane throughout the cut. If you begin by feeding the stock into the Bit from a position in front of the Guide Pin and end by feeding the stock into the bit from a position to the left or right of the Guide Pin, you will change your lateral depth-of-cut and not achieve a smooth, consistent profile. It’s a good idea to make some practice cuts before attempt- ing this operation on an actual project piece

When forming decorative edges on straight workpieces with a non-piloted Bit, use your Overarm Router Fence to control your lat- eral depth-of-cut. If you’re working with

Figure 26. Cutting a rabbet in the back side

of a round picture frame.

This method is basically the same as cutting decorative internal edges using a pilot bit . . . except . . . a large diameter straight Bit and a Guide Pin are used.

The following equation will help you deter- mine the size Bit and Guide Pin to use for producing a rabbet of a specific size.

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