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A Lock that is fitted into the edge of the door
Types & Styles of mortice lock
Ways a motice lock operates
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MORTICE LOCKS

When is a chubb lock not a chubb lock? When it's a Union lock, or a Yale lock, or an Era lock or almost any other make of lock that is fitted into the edge of the door.

A mortice lock is fitted into a mortice in the edge of the door and they come in a huge variety of sizes; this booklet shows the most common types.

Replacing a mortice lock can be difficult if you can't find an exact match for the one you already have fitted.

It is best to remove the old lock and bring it in to show us, but this may be inconvenient or impractical.

The following pages show sketches of the main types of mortice locks with all their vital measurements, by giving us all the dimensions (body colours and markings also give us good clues) we should be able to come up with a close replacement.