Leigh rtj400 - Chapter 8 Half Pitch through Dovetails

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RTJ400 User Guide
Half-Pitch Through Dovetail Joint Procedures
Chapter 8
8-6 Prepare five similar boards (one for testing) about ½"×
6 ¼" by about 12" long [13mm × 159mm × 305mm]. Boards of
different thicknesses may also be joined.
 IMPORTANT: Read this whole chapter before routing any
boards.
8-5 Making a Box Note the symbols indicating the inside
or outside of the pin and tail boards. When assembled with the
finished pieces properly oriented, any one of the pin ends will fit
any one of the tail ends. Mark the inside faces of the tail boards
A
and outside face of the pin boards
B
.
8-3 Use this chart to determine the board width for your project. Through Dovetail joints may be routed in boards up to ⅝"
thick for pin boards and 1" thick for tail boards. Board widths are determined by the total number of full tails in the joint design.
Note: Board widths may be wider than the chart width by half of the dovetail bit diameter or less than the chart width by one
quarter of the dovetail bit diameter.
8-4 Use the Quick Reference strip to determine the correct
dovetail bit and guide bushing combination for the board
thickness, in this case, the Leigh e10 guide bushing and the
optional ⅜" Leigh 70-8 dovetail bit for tails and the optional e7
guide bushing and Leigh 140-8 straight bit for pins.
8-7 Fit the e10 eBush to the router table/router table insert, set
to 5. The eBush is used to adjust joint fit.
A
A
B
B
Board widths are based on the number
of full tails
A
in your design. Board
edges should always end in a half-pin
B
.
Board Width Selection for Half Pitch Through Dovetails
No. of Tails 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Inches
Min ⁄" 1 ½" 2 ⁄" 3 ⁄" 3 ⁄" 4 ⁄" 5 ⁄" 6 ⁄" 6 ⁄" 7 ¾" 8 ⁄" 9 ⁄" 10 ⁄" 10 ⁄" 11 ⁄" 12 ⁄" 13 ⁄" 14" 14 ⁄" 15 ⁄"
Exact ⁄" 1 ⁄" 2 ⁄" 3 ⁄" 3 ⁄" 4 ⁄" 5 ⁄" 6 ¼" 7 ⁄" 7 ⁄" 8 ⁄" 9 ⁄" 10 ⁄" 10 ⁄" 11 ⁄" 12 ½" 13 ⁄" 14 ⁄" 14 ⁄" 15 ⁄"
Max ⁄" 1 ⁄" 2 ⁄" 3 ¼" 4 ⁄" 4 ⁄" 5 ⁄" 6 ⁄" 7 ⁄" 7 ⁄" 8 ⁄" 9 ½" 10 ⁄" 11 ⁄" 11 ⁄" 12 ⁄" 13 ⁄" 14 ⁄" 14 ⁄" 15 ¾"
No. of Tails 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Millimeters
Min 18 38 58 77 97 117 137 156 176 196 216 235 255 275 295 314 334 354 374 393
Exact 20 40 59 79 99 119 138 158 178 198 217 237 257 277 296 316 336 356 375 395
Max 23 43 62 82 102 122 141 161 181 201 220 240 260 280 299 319 339 359 378 398
A
B