Using a sharp 1 inch wide chisel cut a series of parallel lines into the jamb about 1 4 inch apart staying within the scored lines and holding the chisel perpendicular to the wood.
Chisel door frame for lock.
Use the 10mm chisel to square the hole up cutting at the top and bottom first.
Take the door off put in a door stand so the lock side of the door is facing up drill holes to depth in the cavity with a regular drill mortise chisel to clean the edges and final size go find something else to build after 5 minutes of drilling and chisel work.
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Step 4 remove the waste wood with the chisel bevel side down held nearly parallel to the jamb.
Close the door till it clicks shut flush with the lining.
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Fortunately cutting out this mortise isn t nearly as difficult as it sounds.
Score around the plate with a sharp utility knife.
Once you have determined this chisel out the recess in the door frame for the striking plate keeper and screw into position.
The strike plunger enters a strike plate on the jamb and keeps the door closed locked or both.
Using a router attachment remove the wood between the pencil lines drawn on the door edge to create a mortise for the faceplate.
Knowing how to cut a mortise is essential for installing a deadbolt lock.
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Score around the outline of the hinge with a utility knife.
Example of how to use a bevel edged chisel to create hinge slots on a beech wood door.
Remove the hinge from the door or jamb.
Fit the latch and faceplate into the door.
The side of a door frame where the lock engages is known as the strike side of the frame.
Lightly tap the chisel with a hammer around the perimeter of the mortise to deepen the scored line.
Close the door until it is almost completely shut and then mark on the jamb door frame the position where the striking plate keeper will be fixed.
Remove the keep and drill a 16mm hole about 10mm deep.
You ll need to cut a mortise a small shallow recess in the wood of the door and doorjamb for the latchbolt and strike plate to rest.
Position the chisel on the scored line with the chisel perpendicular to the door or jamb and the bevel side of the chisel facing toward the mortise.