1) The first Plunge is in the straight up and down position. The mortiser should be aligned just inside the marked out mortise on your work piece. Set your depth stop to be 3/8" to 1/2" deeper than the length of the tenon the mortise is going to receive.
2) After the first plunge, Pull the lever on the right hand side of the tool to release the head and pivot the chain bar to the second cutting position. (lever in upper left in picture).
3) Plunge the tool again to the depth established by the tool's depth stop.
4) After the second plunge, again pull the lever to release the head and pivot the chain bar to the third plunging position.
5) Plunge again to the depth stop.
6) You have now created a slot that is the thickness of the chain, i.e. 18mm (3/4"), by 5 1/8" long.
7) Move the head of the tool to the opposite side of the mortise marked on the timber by using the handle (located lower left in the picture).
8) Repeat the three plunges again to finish the mortise. If the mortise is longer than 5 1/8" you will need to reposition the tool and repeat the process.
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