Atlas Copco’s new handheld pneumatic breaker RTEX

Published 22/4, 2016 at 12:22

Atlas Copco’s new RTEX hand held pneumatic breaker is based on a new operating principle of constant pressure control, improved energy transfer within the breaker and the new RHEX power chisel to achieve exceptionally high breaking efficiency.

The RTEX, weighing only 25kg, has the breaking capacity of 30kg to 35kg breakers using only half as much compressed air. The tool is more compact than a traditional breaker and stiff handles and the Sofstart function make it very easy to control the power of the RTEX.    

The three axes hand-and-arm vibration is below 5m/s2 according to EN ISO 28927-10. Under these conditions an operator can work up to eight times longer than with conventional breakers, according to the safety guidelines. This is possible due to the constant pressure chamber on the top of the breaker, which serves as advanced pneumatic suspension.

The new working principle was invented by Atlas Copco engineers Olof Östensson and Thomas Lilja from the Construction Tools Innovation Centre in Kalmar, Sweden.

“In a conventional breaker air is discharged each time the acting piston moves up or down,” said Östensson. “In the RTEX the air is discharged only once on the piston’s return stroke. Then the constant pressure from a chamber on the top of the RTEX pushes the piston down. The pressure on top of the acting piston is constant and therefore does not generate vibration, as on conventional breakers, so there is no need for vibration damping. To achieve this, we moved the valve from the top of the breaker to the bottom, our new ‘Up-Side-Down’ concept. The new, longer and heavier piston transfers power much more efficiently to the unique RHEX power chisel.

“Even though the RTEX can work with conventional chisels, the RHEX is specially tuned to our new breaker in order to achieve optimum shock wave interaction for better breaking performance. The RHEX also has a special concave tip profile, which significantly reduces jamming. The new RTEX working principle, long piston and RHEX chisel have resulted in record high efficiency of 50% less air needed for the same breaking capacity.”

“The best news about the RTEX is that it pays for itself,” said Construction Tools Division president Vladimir Kozlovskiy. “The fact that you need a compressor only half the size or can use two breakers instead of one from the same energy source gives instant payback by paying less for the compressor. It is ergonomic and saves both money and the environment.”

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