to Leigh eNews for the latest on new products, specials and updates
* Email Address:
First Name:
Last Name:
Do not show this again
You may unsubscribe at any time.
Privacy Policy: We will never sell, rent or otherwise transfer information about you
to any other party.
Leigh eNews
View Cart
How-to videos and more
Mortise & Tenon Joints:
How to Rout a Double Twin Mortise & Tenon Joint
on the Leigh FMT Pro
Leigh FMT Pro — How to Rout a Twin Mortise &
Tenon Joint
The FMT Pro makes easy work of twin double mortise & tenon joints, with a few extra steps required than for single joints. Twin joints are most often used for projects that require a bit more strength than single joints provide, such as workbenches, garden benches, chairs, bed frames, tables, cabinets and large chests. Here's how to rout a double in line joint:
The Tenons
Select the joint guide and matching bit for the desired mortise & tenon size. Snap the guide into the table's guide recess.
Mark the two tenons and mortise position to suit your layout.
Clamp your tenon workpiece onto the clamp plate, against the side stop fence. Move the table to sight the rear tenon position, lock the left, right and front limit stops against the limit posts. Then sight the front tenon and lock the back limit stop. This sets up the table for easy and accurate positioning, as you rout each successive workpiece.
Place the router/sub-base on the table in position, ready to rout around the joint guide.

Note: Duplicate tenons can be routed without having to mark or sight the tenons.
Rout each tenon in its respective table position.
1. Rout the rear tenon.

2. Move table to front. Rout the front tenon.
The Mortises
Remove the tenon and router. Extend the sight, and clamp the mortise board to the jig with the mark aligned to the sight.
Place the router/sub-base on the jig table and rout the first mortise.
1. Rout the rear mortise.
Rout the second mortise in its respective table position, as set earlier by the table limit stops. The limit stops allow for precise repeatable positioning of the table.

You’re now ready to join the routed mortises and tenons together.
2. Move table forward. Rout the front mortise.
For more detailed instructions, see the User Guides and Bulletins on the Support page.
5 Year Warranty
Leigh has the best warranty in
the Industry, plus a 90-day
Satisfaction Guarantee.
See details >
Leigh eNews
Receive our latest innovations,
how-to videos and special offers.
Register for your chance to win
$300 of Leigh products!
Draws held every 2 months!
WIN $300
of Leigh Products!

D4R Pro Dovetail Jig
Super 12 Dovetail Jig
Super 18 Dovetail Jig
Super 24 Dovetail Jig
R9 Plus Dovetail & Box Joint Jig
F3 Finger Joint Template
F18 Finger Joint Template
F24 Finger Joint Template
Isoloc Joint Templates
FMT Pro Mortise & Tenon Jig
FMT Jig Upgrade
Super FMT Mortise & Tenon Jig
M2 Multiple Mortise & Tenon Jig
Dovetail Jig Accessories
VRS Vacuum & Router Support
VRS Accessory Kits
Accessory Kits for Leigh Mortise & Tenon Jigs
Router Bits, Dovetail
Router Bits, Spiral Upcut
Router Bit Sets
Template Guidebushes and Adaptors
Bridge Piece Material
Earlier Model Jig Upgrades
Clamps, Hold Down
F-Clamps for the Super FMT
User Guides
Videos, Instructional

Mortise & Tenon Jig Accessories
FMT/Pro Sidestop Upgrade
Accessories / Accessory Kits
Vacuum Box Attachment
Router Bits, FMT Pro
Router Bits, Super FMT
Router Bit Sets
Photo Galleries
Dovetail Joint Photo Gallery
Isoloc Joint Photo Gallery
Frame Mortise & Tenon Joint Photo Gallery
Multiple Mortise & Tenon Joint Photo Gallery
Finger / Box Joint Photo Gallery

Where to Buy
Videos & Gallery
Jig Comparison

5 year Warranty
Satisfaction Guarantee
Customer Support
Register Products
Contact Us
© 2015 Leigh Industries.
All rights Reserved.

Leigh Jigs is a trademark of
Leigh Industries Ltd.

Toll Free: 1.800.663.8932
Web design by
pro.NET Communications