Insider Reports

QUICK Sign-up

New Content Updates
Educational Webcast Alerts
Building Products/Technology Notices
Access Exclusive Member Content

All fields are required.

Readers Of This Article, Also View:
Electrical Preventive Maintenance ... Pay Now or Pay (More) Later - Sponsored Learning

Be Prepared for Cold and Flu Season - Sponsored Learning

<< Back to Facilities Management News Home

<< Maintenance & Operations

Makita Expands AVT Line-up with New 2-Inch Rotary Hammer



La Mirada, Calif. – Makita has expanded its line-up of concrete hammers with a new 2-inch AVT Rotary Hammer that has up to 89 percent less vibration than the previous model, but with no compromise in impact energy.

The new HR5212C is engineered with enhanced Anti-Vibration Technology (AVT), a synchronized three-component system for significantly less vibration that results in a vibration rating of only 9m/s².

The AVT is an internal counterbalance system that greatly reduces vibration for increased user comfort and greater efficiency. The HR5212C features an enhancement to this already innovative technology with the new synchronized three-component system:

• Air Actuated Counterbalance directs air pressure from the crank and barrel room into the counterbalance cylinders to move counterweight pistons in the opposite direction of the drive piston, which actively reduces vibration.

• Vibration-Absorbing Housing features a spring-loaded main handle and upper housing that move independently of the motor and drive mechanism, engineered to isolate vibration away from the user. This vibration-absorbing housing effectively isolates the rear handle and side handle – an industry first.

• Integrated Damper Spring at the base of the impact bolt is engineered to absorb impact vibrations from the drill bit.

"Many rotary hammers have a detached, spring-loaded handle as their primary means of reducing vibration, which appear to be just updates to an existing tool having limited effect on vibration reduction," said Livingston. "Compare this to our three-component AVT system, which is advanced technology that is part of the overall engineering of the tool, isolating vibration not only at the rear handle but also at the side handle as well, an industry first. The result is industrial performance with significantly less vibration."

The new Rotary Hammer has one the lowest vibration ratings in its class at only 9m/s². The powerful 15 AMP motor delivers 19 Joules (14 ft. lbs.) of impact energy for faster drilling. An added feature is the option of lock-on or trigger-activated in the "chipping only" mode, with a push button start/stop control right in front of the rear handle for more convenient operation.

 Additional features include soft start for more control and greater accuracy, a torque-limiting clutch, and constant speed control that automatically applies additional power to the motor to maintain speed under load. The HR5212C offers two-mode operation for "chipping only" or "hammering with rotation," as well as 24 bit angle settings and a one-touch sliding chuck for quick bit changes.

The new HR5212C is engineered for a range of concrete applications including drilling/coring through-holes for pipes, setting larger anchors, securing tilt-wall supports, small chipping applications, and more. It is ideal for a range of trades including masons, concrete contractors, demolition contractors, plumbers, electricians, sprinkler installers, and general contractors seeking a best-in-class rotary hammer.


More From 11/10/2014 on FacilitiesNet