Atlas Copco Construction Tools Offers HB 7000 Hydraulic Breaker

Sun February 01, 2009 - National Edition
Construction Equipment Guide

Accepting a maximum hydraulic flow of 119 gpm (450 Lpm) at 2,610 psi, the HB 7000 delivers an impact rate of up to 450 bpm.
Accepting a maximum hydraulic flow of 119 gpm (450 Lpm) at 2,610 psi, the HB 7000 delivers an impact rate of up to 450 bpm.

The HB 7000 hydraulic breaker attachment from Atlas Copco Construction Tools LLC boasts a service weight of more than 7 tons (6.3 t), making it ideal for primary and secondary quarry breaking, demolition, tunneling, trenching and foundation work.

Accepting a maximum hydraulic flow of 119 gpm (450 Lpm) at 2,610 psi, the HB 7000 delivers an impact rate of up to 450 bpm. This offers maximum productivity in extreme breaking conditions.

The HB 7000 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 slippage. It then adjusts the power output to match the density of the specified material to be broken. This reduces excess shock to both the breaker and carrier lengthening the service life on tension bolts and retainer bars.

To further maximize efficiency, the HB 7000 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 also is ideal for 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 in 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 that 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 is ideal for demolition applications.

An energy recovery system that prevents damage from piston recoil on extremely hard materials also is standard on the HB 7000. The energy recovery system consists of a shuttle valve that detects piston rebound and a high-pressure accumulator that stores energy from piston recoil to use on succeeding strokes, making them faster and more powerful. Recycling recoil energy increases breaker efficiency and reduces pressure spikes transmitted back to the carrier.

To reduce excess vibration and noise, the HB 7000 comes equipped with the VibroSilenced damping system. Elastic elements between the percussion mechanism and guide system provide full acoustic insulation, reducing noise by up to 18-dB(A) compared to similar systems.

For prolonged service life, the HB 7000 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. This protects 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.

The HB 7000 uses a working tool of 8.27-in. (21 cm) in diameter at working lengths up to 46-in (117 cm). Available in three lengths for a variety of applications, the HB 7000 tool options include the moil point for multi-purpose use, the flat chisel for rock breaking and demolition and the blunt tool for breaking rock, concrete and oversized material.

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