Lightly mark a height line on the edge and both faces
of the door, and the door jamb, to indicate the top of
the lock when fitted. Mark a line down the centre of
the door edge, extending above the height line and
300mm (11
13
/
16
”) below it.
STEP 1
Hold the template against the edge of the door with the
top in line with the height line, and with the arrows in line
with the ‘centre of door edge’ line. Mark the positions
of the fixing screws, and the holes to be drilled for the
mortice.
STEP 2
Apply tape to the 16mm (
5
/
8
”) drill bit at 90mm (3
9
/
16
”)
from the tip to act as a depth guide when drilling the
mortice holes. Ensure the drill is level and parallel to the
door face and drill the holes as indicated on the template.
Remove the remaining wood with a chisel to leave a clean
mortice hole which accepts the lock case without forcing.
With the lock in the mortice make sure that the forend is
parallel with the door edge and mark the outline of the
forend plate. Cut the outline with a Stanley knife to avoid
splitting out when chiselling. Chisel a rebate sufficient
to accept the forend flush with the surface.
STEP 3
Fold the template accurately along the ‘fold along the
door edge’ dotted line and tape it to the door face with
the top in line with the height line, and the fold on the
door edge. Mark the centres of all the holes to be drilled.
Remove the template and repeat the procedure on the
other face of the door.
STEP 4
Drill the holes from both sides of the door to improve
accuracy and to avoid splintering out the door face.
STEP 5
Install the lock case in the door.
STEP 6
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