LOCK/JIG/B
-10-
OPERATION
Marking Out
n
Choose the position of the lock carefully.
Position the lock with the centre of the spindle
aperture at approximately 1m above the floor.
Whilst the lock is on the edge of the door,
mark the top and bottom of the lock case
on the door edge. Do not choose a position
where the cross member joins the stile as it
will weaken the door.
n
Then using a marking gauge set to half the
thickness of the door, join the marks to show
where the centre line of the mortise lock will
be.
n
Extend the centre line with a pencil at each
end of the centre scribe line to a length of
350mm so that the centre lines on the jig can
be tightened in with them. These lines should
be marked accurately to ensure that the jig is
set correctly.
n
Mark a horizontal line across the edge at the
centre of your lock position. You now have
two centre lines to line up with the centre
lines on the jig body.
Please note, the centre of the mortise
may not be on the centre line of the
spindle hole.
n
Mark out the spindle and keyhole position on
the face of the door as normal using a paper
template or the lock body as shown with a
bradawl (ensuring the front of the lock is flush
with the door edge).
CL
CL
350mm
Special Note:
If fitting the lock to a non-solid core door,
ensure the lock block is located first.
