Skip to main content Skip to page footer
Lock GmbH Lock GmbH

The EWA is the reliable power source for every application. Slow-running, with self-locking worm gear and integrated control unit, it performs its work for decades without any maintenance. It can be used for ventilation, shading, lifting and adjusting tasks in agricultural applications or in industry and is used in all sectors. 

SINCE 1959

successful in series production

< 1%

failure rate

> 1.000

variants

Applications

Horticultural

Agriculture

Lock premium quality:

With a failure rate <1% over decades, the Lock EWA set standards in terms of quality and service life. Careful manufacturing with attention to detail, German engineering and an understanding of the application create a product that is second to none with satisfied customers worldwide. Long lasting Lock, our promise that we keep. 


The development of new Lock drives always begins where they are to be used: in the application. The basic understanding of the application, the measurement of the physical conditions but also the assembly processes are the first steps and the basis. Added to this are decades of experience, the unique knowledge of Lock experts - whether in technology or production - and rigorous testing in our own test laboratory.


Only then does a new drive make it into series production. But that's not all: every drive produced is individually tested before it leaves the factory and is always subject to Lock's strict quality requirements.

Lock has been manufacturing self-locking gears since its foundation in 1844. This long experience has led to an optimum match between the individual gears and the perfect combination of materials. A gearbox that never loses its self-locking ability and operates extremely quietly and smoothly. This is why EWA is preferred for use in areas where there is public traffic (e.g. DIY stores and garden centers).

The perfect combination of motor and gearbox generates the right torque for every application. We always assume a service life of 1,000 hours under dynamic full load.

A dynamic full load occurs when the application is subjected to additional short-term stress due to external influences. This can be caused by wind, snow, rain or mechanical problems in the drive train. By taking these cases into account, each EWA has a unique additional reserve that can further increase the service life and ensure greater safety in the application.
 

Use in all installation positions and in different climate zones is already taken into account in the design. All screws in the gearbox can be individually turned into ventilation screws with 2 turns. There are therefore no limits to the expansion of the gear oil at higher temperatures and the individual installation.
 

All gearbox housings are made of gray cast iron and milled from a single piece. Grey cast iron is characterized by high strength and durability. Lock applications demand robustness and resilience over decades. Gray cast iron can withstand these high impact and load requirements and guarantees long-lasting performance. Compared to aluminum, Lock's EWA have superior heat resistance. This is an advantage in very hot regions of the world to prevent oil leaks for a long service life. As they are manufactured from a single block, there are no seams in the gearbox housing and no oil leakage is possible.

Each EWA is sealed at both shaft ends and both shaft ends are fully painted. This permanently prevents oil from escaping from the gearbox housing and also permanently protects the compartment for the LSC or END control unit from dirt and moisture.

All EWAs are given a tropicalized coating over the entire drive. This includes the motor, gearbox, cables and shaft ends. All-round protection against impact, heat, moisture and dirt. In addition, all shafts undergo a special deep treatment, which results in the same properties as A2 stainless steel: Rust doesn't stand a chance.

Single-phase EWA are always pre-wired and have overheating protection. This prevents installation errors and the motor from burning out.
 

Long lasting Lock - the Lock quality promise

Should it be necessary to change the motor on an EWA, this can be done very easily. The gearbox housing and motor are separated by a seal. This means that the gearbox housing can remain in the drive train and the motor can be replaced without oil leaking out. Replacement motors are available from our service department.

Customers who already rely on Lock