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Master key system organisation

Locking maps are useful for organising comprehensive master key systems. They make organisation much easier. Generally, a distinction is made between two systems: Simple organisation with a master key (abbreviated to MK) and multi-level organisation with a general master key (abbreviated to GMK).

Organisation with master key (MK locking systems)

MK systems have several individual keys (IK) that are keyed to differ, i.e. they are not interchangeable.

Then there is the master key (MK), which overrides all of the individual keys and therefore opens every lock in this system.

MK locking systems are ideal for small offices with a boss and several employees.

Organisation with general master key (GMK locking systems)

GMK systems have both individual keys (IK) and group keys (GK) that are assigned to different IK's. Several GK's can be assigned to one master group key (MGK).

The general master key (GMK) then overrides every key in the system.

GMK locking systems are used for organisation in large office buildings with several departments and sub-departments.

Closure direction and closure travel

	Closure travel for cam locks 90°	Closure travel for cam locks 180°
Closure direction left
Closing direction right

The closure travel is specified by numbers and the closure direction is specified by letters with cam locks. They refer to the installation situations shown in the tables. Locks with closure travel 180° can be altered to all closure travels. Factory set is closure travel 1.

Locks with closure travel 90° are either left or right locking locks. The closure direction is here specified by letters. The first letter indicates the factory setting, the closure direction can be altered to the letters specified in brackets by re-positioning the locking cam (example: Closure direction A [D, F, G]).

Häfele Symo locking system

Symo Modular cylinder removable core system from Häfele

Symo is a modular cylinder removable core system from Häfele. Without tools and time-consuming installation, it provides maximum flexibility at minimum costs and effort.

Due to the variety of components within the Symo system, all present and future applications can be covered – and all this with maximum freedom during planning and execution.

All components of the Symo system can be combined as required and exchanged, modified or upgraded at any time.

Locking maps can be modified easily, quickly and economically. Only the cylinder core is replaced (without tools), the lock - and therefore the piece of furniture - remains untouched.

Rational furniture production

Since the lock and the cylinder core are separated, the locks can be pre-mounted in the furniture and are fully functional through their protective caps. The protective caps can be replaced easily and without tools by the required cylinder removable core at any time. The furniture can therefore be produced independently from its future use and from the required locking maps, and can be equipped with the required locks. This allows rational mass-production. The individual locks can be integrated into the locking map by inserting the cylinder cores at any time, even after the furniture has been set up.

Installation and disassembly of cylinder cores without tools

No tools are required for inserting and removing the cylinder cores, which can also be done at any time after the locks have been installed. The cylinder cores can only be inserted or removed with the lock in open position. The cylinder can be removed using a removal key.

Maintain the cylinder cores every 6 month, but do not treat the cylinder cores with graphite!

Flexibility and economic efficiency – at any time

Previously, removals, changed locking maps and security requirements as well as lost keys were the weak points of every locking map which always required time-consuming and costly modification measures. Symo provides maximum flexibility even years after completion. Simply replace the cylinder cores to adapt the furniture locking concept to changed requirements. No tools are required and the installation is fast and easy.

Whatever the requirements are: Symo is prepared.

Plate cylinder or pin tumbler cylinder?

With the Symo locking system you can choose between plate cylinders and pin tumbler cylinders.

Universal	Universal Objekt

Premium 5	Premium 20

One protective cap, several functions!

(1)cylinder housing (2)protective cap

The protective caps for the Symo locks not only protect the interior of the cylinder housing against dirt or damages during the construction phase,

but also function as building site keys that can be operated with a coin or screwdriver due to their design. After construction is completed, the protective caps can be removed easily without tools and replaced by the required cylinder cores

Häfele Symo – so that you are flexible

With Symo from Häfele you are using a mechanical furniture locking system with many advantages.

Plate or pin tumbler cylinder? It depends on the purpose! Symo cylinders are either plate or pin tumbler cylinders. The version that is used depends on the frequency of use and the size of the locking system.

Symo cylinder	Description	Area of application	Frequency of use	Master key system complexity	Security requirements
Universal	With plate cylinder	Office furniture series production	Low	Basic	Low
	for MK systems up to 2,600 key changes Protected from direct access
Universal Objekt	With plate cylinder	Office furniture series production	Low to medium	Basic	Low
	for MK systems • up to 200 key changes Protected from direct access
Premium 5	With pin tumbler cylinder	office furniture	Medium	Medium	Medium
	for MK systems up to 500 key changes	Small mail distribution systems
Premium 20	With pin tumbler cylinder	office furniture	Medium to high	Medium	Medium
	For MK and GMK systems up to 400 key changes, depending on the complexity of the system. We provide you with competent advice.	Mail distribution systems Display cabinets

Care instructions

The cylinders must be maintained once or twice a year with a graphite-free and resin-free spray, depending on the frequency of use.