WESTFIELD, Mass. – The HB 4200 hydraulic breaker from Atlas Copco Construction Tools LLC features Krupp percussion technology and a service weight of more than 4 tons, making it ideal for demolition, tunneling, trenching, foundation work and primary and secondary quarry breaking.
Accepting a maximum hydraulic flow of 84 gallons per minute at 2,610 psi of pressure, the HB 4200 delivers an impact rate of up to 530 bpm. This allows maximum productivity under some of the most extreme breaking conditions.
The HB 4200 comes standard with AutoControl, a monitoring system that allows the breaker to adapt its frequency and power output to match operating conditions. It begins by firing the first stroke at half power to create a pilot notch that will center the working tool and prevent unnecessary tool slippage. It then adjusts the power output to match the density of the specified material to be broken. This reduces excess shock on both the breaker and carrier and lengthens the service life on tension bolts and retainer bars.
To further maximize efficiency, the HB 4200 features the StartSelect system, which allows start-up and shut-off to be adjusted to fit job-site conditions. In AutoStop mode, the breaker will not fire until the operator applies down pressure on the demolition tool via the carrier. AutoStop eliminates damaging blank firing by circulating the hydraulic oil internally under low pressure when down pressure is not applied to the tool. AutoStop is also ideal for safely circulating and warming the hydraulic system before breaking in cold climates.
In AutoStart mode, the StartSelect system works hand-in-hand with AutoControl. The breaker begins operating as soon as the working tool comes into contact with the material regardless of down pressure, but power is limited to 50 percent until the demolition tool can be fully seated in the breaker. This assures the breaker is properly positioned to accept full single blow energy safely without a damaging blank fire. AutoStart mode makes the breaker more versatile and ideal for demolition applications.
An energy recovery system that prevents damage from piston recoil on extremely hard materials is standard on the HB 4200. The system consists of a shuttle valve that detects piston rebound and a high-pressure accumulator that stores energy from piston recoil. The stored energy is used on the succeeding strokes, making them faster and harder. Recycling recoil energy increases efficiency and reduces pressure spikes transmitted back to the carrier.
To reduce excess vibration and noise, the HB 4200 comes equipped with the VibroSilenced damping system. Elastic elements between the percussion mechanism and the guide system provide full acoustic insulation, reducing noise by up to 18-dB(A) compared to similar systems.
For prolonged service life, the HB 4200 features DustProtector II and ContiLube II. The optional DustProtector II feature prevents dust penetration by utilizing a reusable sleeve that contacts the working tool at the base of the breaker to protect the inner mechanism from the damaging effects of dust. ContiLube II is an automatic lubrication system mounted directly on the breaker. Featuring a compact, self-priming pump, ContiLube II eliminates the need to manually grease the breaker before each use. Lubricant levels are easily observed from the driver’s cab.
The HB 4200 uses a working tool of 7.09-inches in diameter with working lengths up to 40-inches. Available in three lengths for various applications, the HB 4200 tool options include the moil point for multi-purpose use, the flat chisel for rock breaking and demolition, and the blunt tool for rock-breaking, concrete and reducing oversized material.
Atlas Copco is a world leading provider of industrial productivity solutions. The products and services range from compressed air and gas equipment, generators, construction and mining equipment, industrial tools and assembly systems, to related aftermarket and rental. In close cooperation with customers and business partners, and with more than 130 years of experience, Atlas Copco innovates for superior productivity. Headquartered in Stockholm, Sweden, the Group’s global reach spans more than 150 markets. In 2006, Atlas Copco had 25,900 employees and revenues of BSEK 51 (MEUR 5 600).
Learn more at www.atlascopco.com.
Atlas Copco Construction Tools is a division within Atlas Copco’s Construction and Mining Technique business area. It develops, manufactures and markets hydraulic, pneumatic, and gasoline-powered breakers and drills, as well as pedestal boom systems worldwide under several brands. The division is headquartered in Stockholm, Sweden and has production units in Europe, Africa and Asia.