A rim lock should not be the main lock chosen for security on an external door. It is not too
difficult to interfere with. It is more suitable for use on a back or side door, in conjunction
with top and bottom bolts. It is fitted to the inside of the door with screws. If you are
replacing an existing rim lock, make sure it is the same dimensions as the previous one and the
holes for the handle spindle and key are in the same positions. This type of lock is operated by
a key and can be opened from either the inside or the outside of the door.
Fitting a rim lock
Use the body of the lock as a template to mark the positions of the fixing screws. By holding
the lock against the door, mark the position of the keyhole with a bradawl. Drill a hole for
the keyhole, and, by holding a spare block of wood on the other side of the door, you will
stop any splintering of wood as the drill bit passes through. If applicable, using a similar
method, drill another hole for the spindle of the handle.
Use a padsaw to cut out the shape
for the keyhole to fit. Screwed the lock into position and check that it operates properly.
Push the door until almost closed and mark on the jamb the position of the striking plate.
Open the door again and chisel out a recess for the body of the striking plate. Then screw
the striking plate into position.
