Chisel away a small amount of wood at a time to open the drill holes into a clean rectangular hole to fit your lock.
How to fit a mortice lock to an external door.
A mortise lock in a very strong special locking system fitted to the inside of a door.
Fit the lock into the door and secure using screws.
This will be your guide when drilling.
Fit the lock back in the door so that the front plate is flush with the edge check the positions of the holes for the key hole and door handle spindle from both sides of the door if necessary remove the lock and adjust the size and or position of the holes so that they line up with the appropriate parts of the mortice lock body.
To prepare the mortice slot for the lock start by marking the centre of the thickness of the door.
The minimum door width is 45mm or 1 75 inches.
When the mortice lock space is chiselled out insert the lock and outline the faceplate with a marking knife.
Difference between rim locks and mortice locks the difference between a rim lock and a mortice lock is that a rim lock is fitted on the surface of the door whilst a mortice lock is fitted in the door edge.
1 the mortise lock defined.
Fit the lock and check the positions of the door handle spindle and key hole adjust these if necessary.
Here are six things you need to know about mortise locks for residential door security.
Chisel a recess for the faceplate.
To use a mortise lock your door must be thick enough to accommodate it.
The body of the lock can be used as a template which you should hold against the correct position on the door and mark with a pencil draw around it carefully always keeping it central to the mark that you made.
Using a sharp chisel cut out the rectangular recess on the edge of the door to take the front plate of the lock.
Then mark and drill screw holes to fix it in place.