Leigh rtj400 - Page 48

4848
RTJ400 User Guide
Box Joint Procedures - 3/8"
Chapter 10
3
/8
"
3
/8
"
1"
3
/8
"
1"
1"
3/8"
1/2"
1/4"
3/4"
0"
1"
143-500
173-500
Depth of Cut
Item No. Carbide Tipped
Bit Diameter
Item No.
Spiral HSS (Optional)
Item No. Spiral Solid Carbide (Optional)
173-500C
BOX JOINT BIT CUTTING DEPTH
F
A
C
E
D
B
PIN BOARD
TAIL BOARD
10-22 Getting Started
Review the drawing opposite,
to get a clear understanding of
how the boards fit together and
to learn the joinery terms.
3/8" Half-Blind Box Joints
10-24 Board Width Selection
Half–blind box joints may be routed in boards up to 1" thick. Use this chart to determine the best
board width, up to a maximum of 16" [406mm]. Board widths are based on the number of full tails
A
in the joint design. Board edges always end with a half pin
B
. Board widths in the chart below
may be increased by ⅜" [6mm] or decreased by ⅛" [3mm] if required.
10-23 Bits, Guide Bushing and Stop Rod
To rout ⅜" half-blind box joints, use the included ⅜" straight bit 143-500 or optional 173-500 or 173-500C bits, the e10 guide
bushing (eBush) and stop rod. They can be routed in board thicknesses up to the maximum cutting depth of the bit, in this case,
1" [25.4mm].
143-500 173-500
(Optional)
173-500C
(Optional)
e10 guide bushing (eBush)
Stop rod
A
Pins
B
Pin sockets
C
Half-pins
D
Half-pin sockets
E
Tails
F
Tail sockets
Board Width Selection for
3⁄8
"
Half-Blind Box Joints
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 ⁄" 2 ⁄" 3 " 3 ⁄" 4 ⁄" 5 ⁄" 6 ⁄" 6 ⁄" 7 ⁄" 8 ⁄" 9 ¼" 10 ⁄" 10 ⁄" 11 ⁄" 12 ⁄" 13 ⁄" 13 ⁄" 14 ⁄" 15 ½"
Exact ⁄" 1 ⁄" 2 ⁄" 3 ⁄" 3 ⁄" 4 ⁄" 5 ⁄" 6 ¼" 7 ⁄" 7 ⁄" 8 ⁄" 9 ⁄" 10 ⁄" 10 ⁄" 11 ⁄" 12 ½" 13 ⁄" 14 ⁄" 14 ⁄" 15 ⁄"
Max 1 ⁄" 1 ⁄" 2 ⁄" 3 ⁄" 4 ⁄" 5 ⁄" 5 ⁄" 6 ⁄" 7 ⁄" 8 ⁄" 8 ⁄" 9 ¾" 10 ⁄" 11 ⁄" 12 ⁄" 12 ⁄" 13 ⁄" 14 ⁄" 14 ⁄" 16"
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 17 37 56 76 96 116 136 156 175 195 215 235 255 275 294 314 334 354 374 394
Exact 20 40 60 79 99 119 139 159 179 198 218 238 258 278 298 318 337 357 377 397
Max 29 49 69 89 109 129 148 168 188 208 228 248 267 287 307 327 347 367 387 406
A
B