Pit & Quarry, May 2012

Breaker designed for stability resilience The new HB 4100 hydraulic breaker from Atlas Copco has a service weight of 9039 lb designed for carriers in the 88185 to 154324 lb weight class but is as powerful as other much heavier breakers the company says A new guide system makes the breaker more stable and resilient A new cover plate for the retaining bars offers more protection in the lower part of the breaker Series standard features include the VibroSilenced system which protects operators against noise and vibrations the PowerAdapt which switches the breaker off in the event of a hydraulic overflow AutoControl which adjusts the blow frequency and energy to match the hardness of the material and ContiLube II an integrated automatic lubrication system www atlascopco com Rock edges protect housing The Caterpillar E Series Hammer models H110Es H115Es H120Es and H130Es are designed for use on small and medium excavators as well as the Cat 450E backhoe loader They feature a symmetrical housing design which allows for rotating the housing 180 to compensate for wear The lower portion incorporates rock edges that add protection to the housing in abusive applications A sleek curved front and back profile eliminates stress points and transfers forces to the bottom of the hammer One piece side plates eliminate the center joint and weld Caterpillar hammer settings are pre programmed in Cat excavator tool control systems for easy set up and the oil flow and pressure are fully adjustable in the tool control program In addition actual hammer working hours can be recorded for routine maintenance purposes www cat com Buckets designed to reduce crushing time MB America Inc offers an assortment of crushing and screening bucket attachments Perfect for on site crushing the MB crusher bucket works by taking advantage of the hydraulic system of the excavators to which it is fitted Four crusher bucket models are available for a wide range of excavators Perfect for the selection of natural materials both before and after the crushing phase the MB S screening buckets reduce crushing times by up to 60 percent the company says They are available in three models and can be installed on all excavator models The company also offers a universal quick coupling system and iron separator www mbcrusher com Power control valve sets breaker characteristics The Chicago Pneumatic RX hydraulic breaker line features 13 models designed to meet a variety of applications All feature hybrid gas oil technology RX hydraulic breakers are designed to achieve higher breaking performance in tougher applications without requiring additional hydraulic input While the impact energy remains constant the breaker increases blow frequency resulting in enhanced percussive performance The Power Stop function found on models RX14 and up reduces blank firing The larger models in the RX line RX25 through RX53 feature a power control valve designed to enable the operator to set the breaker characteristics according to the application for higher productivity www cp com 42 PIT QUARRY May 2012 www pitandquarry com