What is an apartment door lock? Apartment door locks explained simply!
3. January 2023Would you like to know what exactly is meant by an apartment door lock (Wohnungstürschloss)?
Definition of Apartment Door Lock
An apartment door lock is also known as a room door lock and refers to the mortise lock for internal room doors in an apartment or also the mortise lock for the main apartment entrance door.
The center distance (Entfernungsmaß) of apartment door locks is standardly 72 mm. (See also the image below)

Wooden apartment doors standardly have a so-called backset (Dornmaß) of 55 mm. But what exactly is meant by backset?
Backset Explained in Simple Terms
The backset refers to the distance from the locking cylinder to the front edge of the forend (the front edge from which the deadbolt extends).
The center distance and backset of apartment doors differ from the center distance and backset of front doors, as house front doors generally have larger dimensions.
Problem with Your Apartment Door Lock?
Are you currently having a problem with your apartment door lock and cannot solve it without outside help? In this case, the experienced team from Locksmith Munich – Mario Pichelmaier will gladly help you out of a tight spot. We are in action around the clock and can be reached at any time, even on weekends and public holidays.
Our locksmith experts are well-versed in a wide variety of lock types and are also capable of opening your apartment door lock if, for example, you have lost your key or your key has suddenly broken off inside the lock.
We set to work with the right specialized tools to open your apartment door competently and without causing damage.
Your big advantage with us: We gladly offer our services relating to apartment door locks at a transparent and binding fixed price.
Another special feature of Locksmith Munich – Mario Pichelmaier is that the owner, Mario Pichelmaier, is already the 3rd generation to open apartment doors professionally and without damage. His grandfather Johann was already active as a locksmith in the greater Munich area about 60 years ago.
In the year 1981, father Herbert Pichelmaier started to professionally replace apartment door locks of any kind and carry out competent apartment door openings.
Now, it is Mario Pichelmaier’s turn.