Popular Woodworking 2005-02 № 146, страница 67

first by positioning the chisel about 16" away from the baseline. Drive the chisel halfway through the stock, flip the stock over and repeat.

Now position the edge of the chisel in the baseline (note how easily it drops into the incised line) and repeat the process. It's good practice to undercut the baseline very slightly. The undercut surface ensures a tight fit and doesn't weaken the joint. (Remember that the strength comes from the inter

locking tails and pins as well as the long-grain gluing surfaces.)

Now examine the end grain surface very closely. You should see a fine line along the edge of the stock that was created by the marking gauge. If you don't see this line, you've chiseled too far - or not far enough.

Lay Out the Tails

The tail-board layout is created from the pin board. First position the tail board face down on

the bench. Next, place the pin board over the tail board, align the face with the baseline of the tail board, and then clamp it in place. Remember, too, that the wide part of each pin should be facing the inside of the joint.

Mark the tails with your layout knife. Position the blade of the knife against the pin and use the pin to guide the cut. To complete the layout, mark the end of each tail with a knife and square.

Sawing the tails is similar to

sawing the pins except you'll have to tilt the blade on the vertical axis. I think it's bad practice to angle the tail board in the vise; it's best to learn to angle the saw instead. Otherwise, when sawing the tails of a wide board for large casework, one corner of the board will be positioned high up in the air which will make sawing difficult. Instead, clamp the tail board in the vise (make sure it's level) and saw all the cuts one direction, as shown at right. Then

Here is how I remove the waste between the pins. First position the chisel V16" from the baseline and cut halfway through the thickness of the board.

Third, to chisel out the rest of the waste, place your chisel into the baseline and undercut the joint just a bit by angling the chisel as shown.

Then flip the board over and do the same on the opposite side.

Cut halfway through the waste on one side. Flip the board over and repeat.

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Popular Woodworking February 2005