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Surface-Mounted Rim Locks

A surface-mounted rim lock is made for metal and sheet doors that cannot take a mortise pocket: the lock screws onto the face of the leaf and its keep mounts on the frame. It is the most common solution on apartment entrance doors. The catalogue holds 15 models.

Where it is used and how it works

In thin sheet and metal profile leaves, cutting a mortise pocket either weakens the leaf or is simply impossible. The rim lock is therefore fixed to the surface, worked by a cylinder from outside and a knob or latch from inside.

Electric versions work with door entry and access control systems: pressing the release frees the latch. Automatic and photocell models are used on apartment entrances. During fitting, the keep must align precisely with the lock; a misaligned keep stops the door closing.

Frequently Asked Questions

  • Which doors take a rim lock?

    Metal, sheet and profile doors whose leaves cannot be mortised. The lock screws to the face and the keep mounts on the frame.

  • How does an electric rim lock work?

    It works with a door entry or access control system; pressing the release frees the latch and the door can be pushed open.

  • Can it be opened from inside without a key?

    Yes, rim locks have a knob or latch on the inside face and open without a key from within.

  • What matters during fitting?

    The keep must line up precisely with the lock. A misaligned keep either stops the door closing or makes the latch rub.