Leigh FMT PRO From a Users Perspective #1: Basic Jig Features

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Blog entry by pintodeluxe posted 11-17-2020 09:10 PM 760 reads 0 times favorited 2 comments Add to Favorites Watch
no previous part Part 1 of Leigh FMT PRO From a Users Perspective series Part 2: A Closer Look at The Component Parts »

The FMT is intuitive to use, but there are some things you can do to get the best results using the jig. So I thought I’d start a series on the FMT and start with the basics.

The jig has snap-in guides that control the cut for both the mortise and tenon. Because the guides are recessed into aluminum, they absolutely cannot budge while in use. Pick a guide based on the desired tenon size… say 5/16” x 1-1/4” or 1/2” x 2-1/2” (available in accessory kit). The router is mounted on a sled that rides on top of the jig. The sliding action is very smooth thanks to the Teflon glides.

Mark crosshairs on your workpieces to locate the center of the joint, and slide out the retractable sight. Clamp the tenon board in place against the vertical stop. The retractable sight also functions as a height stop.

Loosen the single knob to unlock table movement on the jig.

Sight the crosshairs.

Lock the table.

Rout the tenon. Start with a light clockwise climb cut. Then finish shaping the tenon in the traditional counterclockwise direction. The left guide pin on the sled follows the perimeter of the snap-in guide.

Inspect your tenon before removing the workpiece from the jig. Rout all the tenons before moving on.

The mortises are router in a similar fashion. Position the mortise workpiece horizontally in the jig. The left guide pin rides in the slot of the snap-in guide to cut the mortise.

Flush as you like it. More often than not, I use offset mortises. Either way, it’s no problem.

Check out additional parts of the blog series for a closer look at the features and troubleshooting.
I’d like to cover what goes right, as well as potential pitfalls.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

2 comments so far

View EarlS's profile


4805 posts in 3632 days

#1 posted 11-17-2020 11:58 PM

One of my favorite woodworking tools.

-- Earl "I'm a pessamist - generally that increases the chance that things will turn out better than expected"

View pintodeluxe's profile


6497 posts in 4097 days

#2 posted 11-20-2020 05:51 PM

Glad to hear. It seems intuitive for all it can do.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

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