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Lekatech’s Electric Hammer Delivering Results in the Field
Since its introduction shook the foundations of the global construction industry, a significant milestone in breaking has been reached as the Leka Toras 35 Electric Hammer from Lekatech has entered production. This has led to the equipment being used at customer sites with results matching the claims of the manufacturer. One such customer site involves a construction project currently underway in Helsinki, Finland, where an old primary school building is being transformed into a unique residential property with new apartment buildings being constructed in the surrounding grounds. The contractor, SSA Rakennus Oy, is completing the project in several phases which are taking place simultaneously. The old school building is being renovated, old structures are being demolished in the yard, and bedrock excavation is also underway. This naturally means that operations on the site need to be both efficient and safe. Providing a further challenging complication, the project is located in a densely built residential area with many neighbouring properties. One of the closest neighbours is a daycare centre. As a result, noise and vibration – which can quickly become an issue if operations cause disturbance – has to be mitigated and controlled. SSA Rakennus took these factors into consideration alongside sustainable construction and energy efficiency. This saw the company adopt the Finnish-made Leka Toras 35 Electric Hammer from Lekatech for use on the site.
Lekatech’s hammers effectively use electrical power of an excavator or grid, providing the ideal solution for managing noise on construction sites. The combination of an electric excavator together with an electric hammer – the electric hammer can also be used with a conventional excavator, as was done on this site – provides a combination of productivity, efficiency, safety, low emissions and fuel economy. Electricity is inherently highly energy efficient. The electric hammer can achieve greater energy efficiency than a hydraulic one. The Lekatech electric hammer requires less input energy, with electricity only consumed when an impact is actually delivered. This means that the environment and the locality all benefit. Furthermore, the electric hammer does not produce emissions as found with diesel-hydraulic equipment, is quieter in its operation, and of course only uses the power it needs for breaking leading to more efficient use of power. The highly precise control of the electric linear motor also provides a completely different level of adjustability. With the Leka Toras 35, individual impacts can be adjusted even to parts of an individual impact. These impacts can also be monitored by the control system, making it possible to create efficient impact programmes tailored to different applications. The Leka Toras 35 is designed for use with 7-16-t base machines, and its 18-kW power requirement is highly competitive in relation to the impact energy achieved. The electric hammer is able to be used in wet operating conditions and can even be operated underwater. “It has definitely been quieter in terms of sound, and it has not caused vibrations in the neighbouring buildings when striking,” said Arttu Manni, SSA Rakennus site supervisor. The low vibration level is also considered a positive feature when working close to structures that need to remain standing, such as directly next to walls.
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Now part of the Normet Group, Lekatech Oy has been steadily developing its electric hammer technology for 10 years. Now, the Leka Toras 35 has entered full scale production and use.
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