Leigh FMT Pro Mortise & Tenon Jig

The best mortise & tenon jig in the world.
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One Guide, One Bit, One Setup makes both the mortise and matching tenon! Immensely strong, the mortise & tenon joint is well suited to fine furniture such as tables and chairs, and cabinetmaking. The FMT Pro is Leigh’s premium mortise & tenon jig, bringing professional quality mortise & tenon joinery to any shop and any woodworker. See how easily you can add perfect mortise & tenon joints to your woodworking project with the FMT Pro.


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Leigh FMT Pro — Overview


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Leigh FMT Jigs Comparison

Incredible Range of Joint Sizes

With the FMT Pro, you can rout 68 sizes of standard inch joints from 1/16" x 1/8" up to 1/2" x 5" (79 metric, from 2 x 4 mm up to 12 x 130 mm) using 21 standard guides (24 metric) and one or two Leigh bits. Custom joint sizes up to 1/2" x 5" (12 x 130 mm) can also be achieved.

 

Beauty and Strength

Mortise & tenon joints routed on the FMT Pro are immensely strong and virtually indestructible. This centuries-old joint is the thoroughbred of all woodworking joints and is used in fine furniture and cabinetmaking everywhere. You can easily make tables, chairs and stunning pieces like the bed below.
 
 

Create All This Joinery On One Jig

No other mortise & tenon jig offers the incredible range of joinery options possible with the FMT Pro. See the gallery for even more examples.

Single
  • For chairs, small tables, display units, rail and stile (frame and panel) construction
Double (Twin)
  • For tables, workbenches, beds
Double (In Line)
  • For tables, workbenches, beds
Quadruple
  • For workbenches, beds
Triple
  • For shaped handrails/posts, headboard, bench back rail
Angled Tenons
  • Simple and compound
  • For chairs, garden benches
Through Tenons
  • Beautiful design element on furniture
Raised Through Tenons
  • Bold 3D design element on furniture
Rail and Stile Joinery
  • Also called frame and panel
  • Popular decorative feature for cabinet doors, furniture and homes
Bridle Joints - Standard
  • Single or multiple, for photo frames, table bases, workbenches, decorative corners
Bridle Joints - Mitered
  • For photo frames, table bases and tops, workbenches, decorative corners
Floating Tenons
  • For photo frames, table bases and tops
Haunched Joints
  • For rail and stile (frame and panel) door construction
  • To fill the end of the stile groove which is sometimes run right through
Asymmetric Tenons
  • Tenon is uncentered on its shoulder for more strength at mortise board end
  • For framed, ledged and braced windows and doors
Different Workpiece Thicknesses
  • For all kinds of furniture construction
Y-Axis Mortises
  • For routing mortises at 90° to the clamp plate
  • Optional guide required
Square Tenons
  • Often used for replicating period furniture
  • Optional guides required
Louver Doors
  • Louver doors and windows
  • Optional guides required
Dowel Joints
  • For joints requiring less strength
  • For unusually shaped workpieces of all types

Simple jig operation

The FMT Pro routs both the mortise and matching tenon, with just one joint guide, one router bit and one jig setup. The basic concept is simple, as shown below.


The universal sub-base with your mounted router is positioned on the jig table. It has two guide pins projecting from the bottom of the base. The right-hand pin always runs in the track to the right of the bit opening. The left-hand pin steers the router, traveling around the joint guide to rout the tenon, or in the joint guide center slot to rout the mortise.

How to Rout a Mortise & Tenon Joint

On the Leigh FMT Pro

The Tenon
1 Mark the center of the tenon on the tenon workpiece.
2 Clamp the workpiece against the clamp plate. Move the table to position the retractable sight over the layout lines. Lock the table.
3 Place the router/sub-base on the table with the right sub-base guide pin in the right guide track and the left pin, positioned to track around the guide. Rout the tenon.
Note: Duplicate tenons may now be routed without having to mark or sight the tenons.
The Mortise
1 Mark the left-to-right mortise position on a mortise workpiece.
2 The table remains in the same position. Clamp the mortise board to the jig with the mark aligned to the sight.
3 Place the router/sub-base on the jig table and plunge rout the mortise.
Joint Fit
Fit the mortise and tenon together to check for joint fit. Adjustments can be made if necessary.
Easy Step-By-Step Instructions and Superior Customer Service
The FMT Pro is designed for use by woodworkers of all levels. Leigh has made perfect joinery easy in every way, from thorough, step-by-step user guides, bulletins and how-to videos, to personalized customer service, with instant toll-free technical support and a help line. Click here for Support page.

New! How-To DVD Video Now Available