Remove the keep and drill a 16mm hole about 10mm deep.
How to fit a mortice lock to a door.
Use the 10mm chisel to square the hole up cutting at the top and bottom first.
Trade expert michael demonstrates how to quickly fit a 5 lever security mortise 5 lever mortise lock and handles in this easy diy video by studhawk.
This will be your guide when.
Push the keep on and mark a pencil line all the way round the hole inside for the latch.
Measure and mark out a vertical central line.
Measure where the lock will fit on the door.
Fit the lock and check the positions of the door handle spindle and key hole adjust these if necessary.
Fit the lock into the door and secure using screws.
Using your measurement mark out both the top and bottom of the latch.
The correct positioning of the lock is crucial.
Place the body of the mortice lock against the side of the door and mark the top and bottom edges of the main body on the side of the door.
Please put a mark for keyholes strike plate and latch on the side of the door.
As a guide the height of your lock should be about 1 metre high.
Using a sharp chisel cut out the rectangular recess on the edge of the door to take the front plate of the lock.
On doors with a horizontal mid rail the lock should be positioned clear of the mid rail joints otherwise the joints will be weakened the lock should be fitted in the centre of the rail to clear the upper and lower joints.
Usually the professionals measure up to 36 inches from the bottom where the lock they set.