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MAKITA AVT TECHNOLOGY
AVT is the amazing new
anti-vibration technology from Makita�and the way forward in protecting against
the effects of vibration related injury�its a milestone in user safety and
reliability, setting a benchmark for others in the power tool industry to
AVT technology was derived from research carried out at the
Seismic Research Unit in California�originally
the systems described below were set up to measure the strength of earthquakes
by monitoring the tremors they created. This research led to numerous
scientific studies, which focused on the effects of tremors and
vibrations. Scientists discovered that
its possible to diminish the effects of earthquake tremors by applying the
principles of Dynamic Damping� the fundamental concept on which AVT is
Dynamic Damping is a way of moving energy so that it drains
away from the object you are holding� the more heavily dampened the system� the
faster the energy will drain away. There are various ways of achieving this
i.e. using a mechanical damper�essentially a counter balance weight�that
provides an equal and opposite anti-vibration force. This force puts an equal mass directly
opposite the point at which the striker bolt delivers the impact joules to the
drill bit, saw blade, or breaker steel� effectively eliminating vibration as
power increases. Additionally, without
the dissipation of power through vibration, more of the energy generated by the
motor is delivered to the drill bit, saw blade, or breaker steel.
There�s also a Dynamic Vibration Absorber incorporated into
the design, which shifts the air pressure in the crank assembly, enabling the
barrel to actively control the balancer and move it to the opposite side.
Makita has engineered three different tools with AVT. The
first is the Rotary Hammer,
Makita HR4010C, which has a secondary operator protection
system: A 2-mass (anti-vibration) handle
mounting system, which isolates the machine from the handle with spring
mounts. The handle mounting system
effectively reduces the amount of vibration by absorbing it into the new grip
handle--- called the Vibration Absorbing Grip. This tool has two times less vibration and 50% more efficient drilling
compared to Rotary Hammers without AVT.
The second tool is the Makita 70 lb. Electric Breaker,Makita
. This tool conforms to
construction safety ordinances, and actually exceeds the more stringent
European Health & Safety regulations-- including the Outdoor Noise
Directive. This breaker has three times less vibration and 30% more efficient
chipping compared to Electric Breakers without AVT.
The third tool is the Recipro Saw, Makita JR3070CT. This muscle machine cuts through material
like a hot knife through butter. Special
design emphasis, focusing on ergonomics, was considered by Makita engineers�so
rubber grip areas were also incorporated into the AVT tool designs. These new grips are noticeably more
comfortable�especially on long, tiring jobs.