Makita HR4511C 8kg Rotary Demolition Hammer
Features
SDS Max AVT 8.4kg hammer with high power and low vibration
Reduced vibration for less operator fatigue.
Torque-limiter for additional operator protection.
Specification
Max In Concrete: 45mm Core Bit Diameter (TCT):
125mm Joules: 13Js
Blows Per Minute: 1,250-2,750bpm
No Load Speed: 130-280rpm
Input Wattage: 1,350w
Vibration: 7.5m/Sec HO.7.0m/Sec D Handle
Net Weight: 8.4kg
Standard Equipment
Case, 2 x side handle assembly, Depth stop
Warranty
12 months
AVT TECHNOLOGYAVT is the new amazing anti-vibration technology from Makita and the way forward in protecting against theeffects of vibration related injury, it is a milestonein user safety and reliability, setting a benchmark for others in the power tool industry to follow.AVT was born from research carried out in California at the Seismic Research Unit; originally these systems were set up to measure thestrength of earthquakes by monitoring the tremors they created. This in turn started the process that gives birth to AVT, scientists tried to counteract these tremorsby fighting thewaves using Dynamic Damping, this Dynamic Damping is the principal on which AVT is based.Dynamic Damping is essentially a way of moving energy so it drains away from the object you are holding; the more heavily damped the system the faster the energy drains away. There are various waysof achieving this i.e. using a mechanical damper which is effectively a counter balance weight which, provides an equal and opposite anti-vibration force that 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, this eliminates vibration as the power increases, without the dissipation of power through vibration moreof the generated energy in the motor can be delivered to the tool bit itself.There is also a Dynamic Vibration Absorber, which shifts the air pressure in the crank, and the barrel room actively controls the balancer to move it to the opposite sides of the piston.
click here to download Makita Vibration and Noise Data in excel format.
