INCRA Jig Metric User Manual
METRIC CONVERSION ADDENDUM
INCRA JIG FENCE POSITIONER
General
The Incra Jig Precision Fence Positioner shipped in this package is equipped with a Metric
Scale and includes Metric Sawtoothed Positioning racks along with Metric Joinery Templates.
While the manual and the instructional DVD still include references to the original imperial
scaled version, the necessary conversions are really quite simple. For the most part, just
multiplying the imperial scale reference (in inches) by 25.4 will give you the metric value
(in mm) that you need to proceed.
In the Joinery Applications section of the manual and DVD, the following important changes
need to be noted.
Box Joints (Metric Users Only)
The Box Joint Template provided will require a 10mm bit, rather than the 3/8” straight bit
described in the owner’s manual and DVD. (See the reverse side of this sheet for a correct
joint diagram).
Centering
When setting the initial fence position for centering the Incra Jig as described on page 8 gs.
30 & 30A, set the Incra Jig to 75mm on the scale.
Dovetails (Metric Users Only)
The Dovetail Joint Template provided will still use a 12.7mm (1/2”) - 14 degree dovetail bit, or
for an increased depth of cut you can use the optional 12.7mm (1/2”) - 10 degree dovetail bit.
(See the reverse side of this sheet for a correct joint diagram).
Setting the Depth of Cut for Dovetails
It is important when making the test cuts for establishing the nal depth of cut as described on
page 7, g 26 to make the required cuts at a spacing of 22mm apart.
Centering
When setting the initial fence position for centering the Incra Jig as described on page 8 gs.
30 & 30A, set the Incra Jig to 75mm on the scale.
Cutting the Rabbets for Half Blind Dovetails
When cutting the rabbets for half blind or cornerpost dovetails, as described on page 9, gs.
35 & 35A, and on page 12 gs. 46 & 46A, begin with a light “scoring pass” of 1mm, followed by
several subsequent passes of 1-2mm each until reaching a nal rabbet width of 5mm.
Metric Templates on Reverse
10mm Box Joint Template
10A
11B
10A
11B
9A
10B
9A
10B
8A
9B
8A
9B
SUGGESTED CENTER CUT: 6B
12.7mm (½") Dovetail Joint Template
7A
8B
7A
8B
6A
7B
6A
7B
5A
6B
5A
6B
4A
5B
4A
5B
3A
4B
3A
4B
2A
3B
2A
3B
1A
2B
2B
1B
1A
BOX
mm
1B
10
9A
10B
9A
10B
9B
9B
8A
8B
8A
8B
7A
7B
7A
7B
SUGGESTED CENTER CUT: 5A
APPROX. RABBET WIDTH 5mm
SPACING TO SET DEPTH OF CUT: 22mm
6A
6B
6A
6B
5A
5B
5A
5B
4A
4B
4A
4B
3A
3B
3A
3B
2A
2B
2A
2B
1A
1B
1A
DOV
12.7 mm
1B
Dovetail Depth of Cut Chart
STOCK THICKNESS
BIT TYPE APPROX. DEPTH OF CUT HALF BLIND THROUGH
12.7mm 14° DOVETAIL 6.3mm 12.7mm 6.3mm
12.7mm 10° DOVETAIL 9.5mm 19.0mm 9.5mm
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