Your easy switch to the appropriate brand website in Germany:
No results found for your search
flag_en English
gu-mechanische-schliesssysteme-hero
gu-mechanische-schliesssysteme-hero
Quality and durability

Mechanical locking systems

Individual security for every building

Overview of mechanical locking systems

Mechanical locking systems stand for quality, durability, and reliable security in daily use. Precisely manufactured locking cylinders provide effective protection against manipulation and unauthorized access. Our master key systems enable secure, user-friendly, and economical access control for private homes, businesses, and public buildings. The matching keys are manufactured with precision, ensuring reliable and trouble-free operation. Thanks to their modular design, mechanical locking systems can be flexibly adapted to individual requirements—from simple single locks to complex master key systems with defined access rights. Whether for new construction or modernization: our mechanical locking systems are a proven solution for building protection and controlled access—robust, precise, and durable.

Security and flexibility

Reversible key systems

Our reversible key systems offer reliable security, high durability, and convenient operation. Thanks to double-sided locking regardless of key orientation, they are ideal for use in both private and commercial settings. The robust locking cylinders are precisely manufactured. The long patent term and additional key copy protection versions provide effective protection against unauthorized key duplication. Existing master key systems can be easily expanded or modernized. Whether single-family home, office, or industry—with a mechanical locking system, you choose a proven solution that combines protection and flexibility.

Locking system janus8000

janus8000

The janus8000 offers maximum protection with up to 20 pin tumbler levels, key copy protection, and patent protection until 2028 for maximum security.
Locking system belvius

belvius

With manipulation protection and various key copy protection versions, belvius meets the highest security requirements.
Locking system livius6000

livius6000

The livius6000 reversible key system is an ideal locking system for single or multi-family homes, as well as commercial premises with registered locking.
Locking system helius4000

helius4000

The helius4000 is an ideal reversible key system for private households and small rental properties, offering high operating comfort and patent protection until 2038.
Secure and adaptable

Conventional locking systems

Our conventional locking systems offer a reliable and durable solution for securing residential and commercial buildings. The mechanical locking cylinders are precisely manufactured and provide effective protection against unauthorized access. Available in various versions, the systems can be individually adapted and flexibly integrated into existing master key systems. This way, you benefit from high security, easy handling, and sustainable quality—whether in private or commercial environments.

Locking system nuvius

nuvius

State-of-the-art technology for optimized security! The conventional locking system nuvius is safe and versatile in its high-quality standard configuration.
Locking system detect3000

detect3000

The detect3000 locking system relies on proven conventional locking technology. The protected profile series ensures security. 
Locking system PZ88

PZ 88

The PZ 88 impresses with quality and versatility, featuring five-pin cylinders, bumping and drilling protection—ideal for every requirement!
gu-produktseite-Schließsysteme-pz66-landscape

PZ 66

The standard cylinder PZ 66 is the ideal cylinder for increased security requirements for main entrances, ancillary rooms, and temporary solutions when no master key system is required.
All essential information at a glance

General questions about mechanical locking systems

Mechanical locking systems are a proven solution for security and access control. Here you will find answers to the most important questions about selection, functionality, and security.

1. Functions and areas of application

How do I find the right mechanical locking system for my requirements?

How does a reversible key system differ from a conventional locking system?

What are the advantages of modular locking systems?

What security features should a mechanical locking system have?

2. Security, maintenance, and operation

What maintenance measures are necessary to extend the service life of a locking system?

What should I do if my key is lost or damaged?

Overview of service offerings

Find the right support quickly!

Receive expert support, find the right dealer near you, and download important documents and instructions directly – quickly, easily, and reliably.

Pictogram -  GU BKS SERVICE GmbH

Service

Contact our service directly for professional support!
Our experienced team is at your side with advice and assistance – reliable, competent, and solution-oriented.

Pictogram - dealer search

Dealer search

Find the right dealer near you quickly and easily! Enter your postal code and discover our partners for expert advice and first-class service.

Pictograms - download

Download

Here you will find all important documents, brochures, and instructions. Simply download and use directly!

gu-kontakt-teaser-allgemein-icon
Contact

We are happy to help you!

Our service team will be happy to assist you with any questions regarding products, applications, and projects. Simply contact us by phone or email.