Having gone through an adequate period of design, analysis, development and testing (5 million tightening cycles) we are now offering a new locking device for linear guides, with the following characteristics:


- High clamping force with minimum space required

- Extremely easy installation

- Locking of the slide without backlash or stiffening on it, during the processing

- No reaction on the carriage and therefore no wear of the blocking parts

- Possibility to have, in the same space, a normally open blockage, both for single and double effect, and a normally closed system that meets safety requirements (e.g. on vertical axes) holding the system in place in case of power failure.


The locking devices undergo treatments to protect against corrosion: hard anodizing for aluminum elements and electrolytic nickel plating bath for steel elements.

The normal application of forces, produced by the amplification system, is distributed uniformly on the clamping elements without straining individual points that may affect the rail.

The high efficiency of the system and the high-speed clamping makes our device particularly suitable for application with linear motors and machine tools as well as in various handling systems.

The wide range we offer is able to meet the most different market needs, and our company’s dynamic capabilities provide an immediate response to particular needs of customers.

Excellent price-performance ratio.

These accomplishments have been reached by ERRE.DI. thanks to our thirty-year experience in automation.






ERRE.DI. Automation also produces special locking elements according to particular needs of customers.

ERRE.DI. provides added value by means of our capabilities and availability starting with the design stage: the best synergies with clients are made possible when there is collaboration in the creation of new products.

Engineers at ERRE.DI. utilize the most advanced design software available on the market for the development of all components of the locks.
Design, manufacturing and testing are among the daily activities carried out at our facilities.




The clamping surfaces of the terminals are pressed against the free side of the rail through a dual wedge mechanism. The release, or unlock phase, is rapid thanks to a system of preloaded spring.

The clamping elements can operate in four modes:

1) SE operation, Normally Open

The locking element leaves the guide free to slide. Locking is done by forcing air into the element to activate the closing. The system is unlocked when the air pressure is removed.

2) DE operation, Normally Open

The operating principle is the same as normally open, except for the release phase, which is assisted by air. The vent is replaced by connecting a second air duct (using a 5/2 ways valve).

3) SEM operation, Normally Closed

The locking element closes by means of a spring, and air pressure is used in order to open.

4) DEM operation, Normally Closed

Using a 5/2 ways valve, the force produced by the spring is complemented by the one produced by air pressure; with this variation the clamping force is increased by 2.5 times.



Codes for the clamping elements are given as in the following example:

1. The codes in the product Series are:

2. Nominal guide size indicates the size of the guide rail on which to mount the clamping element. It is also the size of the brake.

3. The Guide type parameter refers to the model of linear guide which the brake is mounted on (it represents the profile of the body of the clamping element in the blockage zone).

4. The encoding of the pneumatic Working type parameter is as follows:

A detailed explanation of the working types is provided in the ‘How the locking works with pneumatic pressure’ section.

5. For Special locking devices, built for custom needs, the code is followed by the letters SP.