Designed around a new operating principle that can be matched to specific applications, the 2,350kg BR3288 and 3,380kg BR4099 are suitable for carriers in the 27 to 60-tonne operating weight class, and benefit from a number of class-leading features, including:
· New operating principle: Stroke length, blow energy and Idle Blow Protector are all easily modified to allow breakers to be matched to individual carriers and applications
· Improved hydraulic efficiency: Delivers massive impact energy and high-blow frequency for exceptional power-to-weight ratio
· Lower operating costs: VIDAT (vibration dampened tierods) system provides improved reliability and minimises downtime while a state-of-the-art sealing system, enhanced lubrication and longer service periods help reduce operating costs.
NEW OPERATING PRINCIPLE
Having originally pioneered the constant blow energy principle, Sandvik has innovated once again to produce a new operating principle that allows the BR3288 and BR4099 to be purpose-matched to individual applications and materials using a simple working mode selector located on the breaker.
A high-energy mode uses a lower blow frequency for optimum breaking power in hard materials, such as granite and reinforced concrete foundations; while a high-frequency mode delivers a higher blow rate and reduced impact energy to break softer materials, such as limestone.
The Idle Blow Protector works regardless of working mode to provide greater levels of protection.
LONG LIFE, LOWER COSTS
Both new breakers have been designed for a long, trouble-free life. Simplified and more robust hydraulics feature less valves and greater back-pressure tolerance, making them the ideal match for a wide range of carriers and hydraulic flow rates.
The BR3288 and BR4099 benefit from the use of long-life, high-tension VIDAT tie rods for improved reliability, extended service periods and lower operating costs.
A new, more robust front head is produced using new manufacturing techniques and features fewer holes to relieve stress. The tool-retaining pins are locked by simple, reliable rubber rings, while the surface of the lower tool bushing has been specifically designed to provide longer tool life.
To further extend the working life of both breakers, they are offered with three greasing options: a centralised manual option, carrier-mounted Ramlube I automatic greasing, or Ramlube II, which utilises a cartridge mounted on the breaker to automatically deliver optimum levels of lubrication for greater wear protection and a longer operating life.
The two new models received their official worldwide launch at Bauma 2010 in Munich in mid-April.