Porter-Cable 4210 & 4212 instruction manual HALF-BLIND Dovetails with Tail Boards Thicker than 7/8

DOVETAIL BIT

TEMPLET GUIDE

ROUTER SUB BASE

I.D. OF TEMPLET GUIDE

DOVETAIL BIT DIAMETER

THERE IS A MINIMUM DEPTH OF CUT

WHEN THE DIAMETER OF THE ROUTER

BIT IS GREATER THAN THE INSIDE

DIAMETER OF THE TEMPLET GUIDE

Fig. 22A

Cutting a dado with a templet guide that has an OD smaller than 3/4" requires two passes.

1.Start on the left side. Keep the router toward the back edge of the dado slot, and cut to the right until you have completed the cut.

2.Start on the right side. Keep the router towards the front edge of the dado slot, and cut to the left until you complete the cut.

3.Leave the router in the dado slot until the bit stops spinning.

NOTE: For deep cuts, use a straight bit first.

NOTE: Cut the tenon just as you would a standard tenon.

1/4" Maximum

Fig. 23A

Fig. 23B

HALF-BLIND DOVETAILS WITH TAIL BOARDS THICKER THAN 7/8"

For tail boards thicker than 7/8", you can use the template normally used for through dovetails (instead of that used for half-blind dovetails) to provide deeper pins and tails (Fig. 24A).

The procedure is the same as that for a normal half-blind dovetail.

NOTE: Use the “half-blind” line for aligning the template.

Fig. 24A

Fig. 24B

With the wood clamped to the base of the jig, the maximum thickness will be 1-1/8". By using a templet mounted to a clamping board, you can use much thicker wood, producing a strong joint.

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