Woodwork course for boys, consisting of a graduated series of thirty models, arranged so as to cover the requirements of the Science and Art Department, South Kensington .. by Nelson William

Author:Nelson, William
Language: eng
Format: epub, pdf
Tags: Woodwork (Manual training)
Publisher: London, G. Philip & Son
Published: 1893-03-25T05:00:00+00:00

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No. 2 0.—BOX DOVETAIL.

Rough Wood-Yellow Pine—11 in. x 3 \ in. x § in.

TOOLS. —Planes, square, marking gauge, cutting gauge, shooting board, tenon and dovetail saws, chisels, mallet, marking point.

(l). Plane up in one piece.

(2). Shoot each end square in the shooting board.

(3). Set the cutting gauge to the exact thickness of the wood, and gauge across each face of block at both ends.

(4). Now set out the shape of the dovetail pins (in this case, two side pins and one middle pin). It will be noticed on diagram, that in the direction of the length of the wood, and on the outside, that the pins have parallel sides, and that the two outside pins are thicker than the middle pin. In setting out, it is perhaps best to set out the edge of the wood on which the measurement of the narrow part of the pins come first, e.g., the narrow part of the two side pins is TV-inch, and the narrow part of the middle pin -g-inch. When these measurements are properly marked off (the wood for the purpose of setting out ought to be held in vice endway up), set the bevel to a slope of f-inch in 3 inches, and mark off the end slope of the pins. Square down with try square the straight narrow parallel side of the pins to the gauge marks.

(5). Now the pins are ready for cutting, fix the block in the bench vice, endways up, with the narrow side pins facing worker, and saw straight down by the outside of the parallel marks and at proper angle of end of pins. (The saw is held a little to the right or a little to the left according to slope of pin, but the plane of the blade must be kept perfectly upright.)

(6). After sawing down take the broadest paring chisel that will go between the pins easily, and from each side cut the pieces out for the socket, driving the chisel with mallet, and having the wood lying flat on the bench, making the first cuts a little way from the gauge mark ; then putting edge of chisel right into the mark and making final stroke.

(7). Now cut the block into two pieces and mark off for the sockets, holding the pin piece in proper position on the socket piece, and following shape of pins with marking point or sharp, hard pencil.

(8). Then square across the end of the grain of the socket piece and cut down, keeping saw kerf on the piece to be cut away.

(9). With small chisel cut out middle socket.

(10). With dovetail saw cut off the shoulders.

(11). Cut the two pieces to length and shoot.

(12). Smooth off the insides and glue together.

(13). Smooth off outsrclelfand iinish.

WOODWORK COURSE FOR BOYS.

No. 20. BOX DOVETAIL. (Full size, broken.)

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