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Mortises machined at the router have inevitably rounded ends. To obtain right angles, the square chisel mortiser is irreplaceable.

Digging rectangular mortises

Digging rectangular mortises: guide

Open the protective side covers to mount the bit in the three-jaw chuck.
For a perfect centering, tighten the three jaws successively.

Digging rectangular mortises: mortises

To adjust the squareness of the chisel relative to the support guide, press its rear face against the guide.
Then tighten it in the collar with the supplied hex key.

Digging rectangular mortises: digging

To make deep mortises, orient the notch (light) of the chisel on the side.
The chips are thus evacuated more quickly from the already notched part of the mortise.

Digging rectangular mortises: chisel

Move the support guide back and forth using the crank.
The piece pressed against the guide by the pressers, align the chisel on the plot.

Digging rectangular mortises: guide

With hardwoods, the vertical blocker holds the piece when raising the chisel.
Position it so as not to impede lateral movements.

Digging rectangular mortises: mortises

Bring the chisel tips into contact with the piece.
Adjust the depth stop located on one of the columns to limit the descent of the tool.

Digging rectangular mortises: digging

During the first piercing, the wick and the chisel may heat up if they are too quickly descended into the wood.
Act smoothly, without forcing too much on the tool.

Digging rectangular mortises: chisel

The number of holes varies according to the length of the mortises to be created.
To facilitate the drilling of a long mortise, pierce both ends and then squaring the central part.

Digging rectangular mortises: mortises

Often lift the tool to clear as much chips as possible from the cut.
Clean the table and guide before placing other mortising parts.


Video Instruction: Chisel Demo: How To Cut Mortises • Complete Sharpening Series Video 34