Our other sites:

How to mark out a mortise using a wheel mortise gauge?

How to mark out a mortise using a wheel mortise gauge?

Shop for Mortise Gauges

Setting out a workpiece ready for a mortise to be cut out by a mortise gauge

Step 1 – Mark workpiece

Decide where on your workpiece your mortise will be cut out of.

Thumb screws on either side of gauges fence move the stems so the blades can be set to a measurement

Step 2 – Set blade measurement

Set the blades in position, matching to the tenon size or your chisel width. Adjust by turning one thumb screw first, anti-clockwise to release, and move the stem up through the fence, locking in place by turning the thumb screw clockwise when it is in the desired position.

Repeat this process with the other stem so the blades are the correct distance apart.

Wheel mortise gauge with mortise already cut out showing the measurement of blade in correspondence

Step 3 – Mark workpiece

Mark the workpiece one line at a time, applying slight pressure to one blade when rolling across the surface then repeating with the other.

Width and length lines of a mortise marked out using a mortise marking gauge

Step 4 – Mark connecting lines

To mark a mortise you will need to mark the end lines as well. To do this readjust your blades, using the thumb screws, to now line up with the tenons width. Again mark the wood one line at a time.

Chiselling out a mortise in wood, marked out by a mortise marking gauge

Step 5 – Cut out mortise

The mortise can now be removed, most commonly using a chisel.

Wonkee Donkee Tools