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Flexible locking systems

Modular locking systems for maximum flexibility

The janus8000, belvius and nuvius locking systems stand for maximum flexibility. Their modular design allows cylinder lengths and functions to be easily adapted—directly on site and without major effort. The systems are designed for a wide range of applications and enable precise adjustment to individual requirements.

Modular locking systems from BKS – profile double cylinders flexibly expandable

Advantages

  • Flexible function modification: A cylinder originally planned as a double profile cylinder can easily be retrofitted with a thumbturn, without costly new purchases.
  • Efficient inventory management: The modular design reduces stock levels, as fewer different cylinder variants are required.
  • Maximum adaptability: Service cylinders enable quick and easy adjustment of locking, function and length to meet individual requirements.
  • Versatile integration: Rigid and modular cylinders can be combined within a master key system, offering an economical, flexible and future-proof solution.
Modular master key systems – representation in different door situations
Individually adaptable

Modular, flexible and secure 

Our janus8000, belvius and nuvius locking systems offer crucial flexibility through their modular design, enabling adaptation to the specific needs of customers.

BKS reversible key system belvius – Modular design – Cylinder cross-section

locking part

The locking part forms the outer component of the profile cylinder. It receives the key, transmits the rotational movement to the cam, and thus ensures the secure operation of the locking system.

core extension

The core extensions are assembled to match the required length.

coupling extension

The coupling extensions are assembled to match the required construction length.

housing cap extension

The required overall length of the cylinder is assembled using the housing cap extension.

coupling

By selecting the coupling, cylinders acquire different functions, e.g. emergency and danger function – even if a key is inserted on the inside, the door can be opened from the outside with an authorized key.

cylinder locking cam

The necessary movement to open or close the lock is transmitted via the cam.

coupling extension

The coupling extensions are assembled to match the required construction length.

core extension

The core extensions are assembled to match the required length.

locking part

The locking part forms the outer component of the profile cylinder. It receives the key, transmits the rotational movement to the cam, and thus ensures the secure operation of the locking system.

spiral locking pin

The housing cap is fastened to the connector using the spiral pin. The spiral pin compensates for small movements between the components.

connector

The connector ensures a more secure cohesion of the two cylinder halves.

spiral locking pin

The housing cap is fastened to the connector using the spiral pin. The spiral pin compensates for small movements between the components.

housing cap extension

The required overall length of the cylinder is assembled using the housing cap extension.

locking part

The locking part forms the outer component of the profile cylinder. It receives the key, transmits the rotational movement to the cam, and thus ensures the secure operation of the locking system.

core extension

The core extensions are assembled to match the required length.

coupling extension

The coupling extensions are assembled to match the required construction length.

housing cap extension

The required overall length of the cylinder is assembled using the housing cap extension.

coupling

By selecting the coupling, cylinders acquire different functions, e.g. emergency and danger function – even if a key is inserted on the inside, the door can be opened from the outside with an authorized key.

cylinder locking cam

The necessary movement to open or close the lock is transmitted via the cam.

coupling extension

The coupling extensions are assembled to match the required construction length.

core extension

The core extensions are assembled to match the required length.

locking part

The locking part forms the outer component of the profile cylinder. It receives the key, transmits the rotational movement to the cam, and thus ensures the secure operation of the locking system.

spiral locking pin

The housing cap is fastened to the connector using the spiral pin. The spiral pin compensates for small movements between the components.

connector

The connector ensures a more secure cohesion of the two cylinder halves.

spiral locking pin

The housing cap is fastened to the connector using the spiral pin. The spiral pin compensates for small movements between the components.

housing cap extension

The required overall length of the cylinder is assembled using the housing cap extension.

Fields of application

  • Construction projects with unknown door thickness
  • Emergency service operations requiring rapid action
  • Flexible door replacement and renovation projects
  • Individual adaptation of locking functions
Specifications at a glance

Technical data for modular cylinders

Technical data for modular cylinders
Order length (BL) from 27 mm to 65 mm
Locking Registered locking, master key system, customer profile
Cam Standard, multiple cams, special versions
Emergency and danger function optional, double-sided from BL 31/31, single-sided at BL 27/31
Freewheel function (FZG) optional, from BL 31/31
Drill protection optional for master key systems, standard for restricted locking systems
Attack resistance according to DIN EN 1303 and DIN 18252 Master key systems: Class 0, optionally Class B (with BS),
Restricted locking systems: Class B

Flexible solutions for individual requirements

Discover in our image film how modular systems set new standards. Whether in planning, implementation or expansion—modularity means maximum adaptability with highest efficiency. Explore the advantages of intelligent design and future-oriented solutions.

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