SUPERJIG - CHAPTER 3
The Leigh e-Bush and
Optional Guidebushes
The guidebush is the vital link between router and jig. All joints created on a Superjig are routed with the unique
e7* elliptical guidebush, a Leigh innovation that provides precise joint fit adjustment for box joints and sliding dovetails.
If your router doesn’t accept the e7-Bush, you can use an alternative guidebush with some limitations.
*Supplied with each Superjig. U.S. Patent No. 8,256,475. UK Patent No. GB2443974. Patent Pending in Canada.
9
3-1 The Leigh e7-Bush
is used to rout through, half-blind,
single pass half-blind and sliding dovetails on a Superjig. The
elliptical design provides precise joint fit adjustment for box joints
and sliding dovetails. A round
7
/16"[11,1mm] guidebush
(min.
barrel length
1
/4"[6,35mm]), can be used to rout through, half-blind,
and sliding dovetails on the Superjig, but the e7-Bush is superior.
These images were copied from D4R Pro UG Fig’s 8-42 and 3-2
1 2
7
/
16
"
[11,1mm]
[6,35mm]
1
/
4
"
min.
3-2 The Leigh e7-Bush that comes with your Superjig is a
unique template guidebush that is adjustable in size. Unlike regular
circular template guidebushes
, the e7-Bush is slightly elliptical
in cross section
. This simple innovation effectively changes the
guidebush “active diameter size” when it’s rotated, and provides
benefits not possible with a standard round guidebush.
1
2
3-3 The e7-Bush (
7
/16") fits the router base or a guide bush
adaptor in the base (see Appendix I). The ellipse/oval shape has
a major axis
7
/16"[11,1mm], and minor axis
7
/16"[11,1mm] less
.020"[,5mm]. Turning the e-Bush 90 degrees in the router base changes
the active diameter by .020"[,5mm] providing minute adjustment and
recordable settings for perfectly fitting box joints.
1
2
1
2
7
⁄16"[11,1mm]
7
⁄16"[11,1mm] less .020"[,5mm]
3-4 To install the e7-Bush, follow these simple steps. Hold the
router the way you normally hold and operate it on the jig. Now,
up end the router in the same orientation.
To Next Page
Loading...