Pits & Quarries
Focus on Breakers
By Aggregates & Roadbuilding Magazine
By Aggregates & Roadbuilding Magazine
Focus on Breakers – Allied, Atlas Copco, PowerTech Canada Inc., Breaker Technology (BTI)
Allied Construction Products, LLC has announced the addition of the Rammer m-Series hydraulic impact hammer to their full-product line. Mounted on excavators, m-Series hammers are built for the demolition of concrete structures, building foundations, pavement, trench rock and oversize rock.
The m-Series hammers are built with a modular design made up of three major components—housing module, impact module and tool module. With this all, new modular design maintenance is reportedly quicker, rebuilding is easier and all modules can be overhauled separately. Features of the m-Series hammers include modular design that allows three modules to be overhauled separately, adjustable impact energy to match working conditions for optimal performance, Constant Blow Energy (CBE) to guarantee that all blows are at full power as well as a higher power to weight ratio with a heavier piston delivering more impact energy. Additional features include easy start or auto-shut-off, Ramlube to ensure continuous greasing to both bushings in all conditions, no tie rods or tie bolts as well as slip-fit lower and upper tool bushings that are easily maintained and require no special tools.
The m-Series hammers are available in two models—the Model 14 and the Model 18. The Model m 14 requires 182 l/m at 16,003 kPa and breaks at a rate of 1,000 bpm while the Model m 18 requires 220 l/m at 16,003 kPa and breaks at a rate of 800 bpm.
Atlas Copco – The range of hydraulic breakers for secondary breakage, demolition and recycling applications continues to expand.
According to Atlas Copco, the HB 3600 breaker is a perfect match to the 35-63 tonnes carrier weight class, delivering 46 per cent more performance per kilogram service weight compared to the average of other hydraulic breakers in this class. Compared to competitive products of equivalent weight, the HB 3600 offers a 30 per cent higher efficiency. Technical data on the HB 3600 includes a service weight of 3600 kg, operating pressure of 160-180 bar, blow frequency of 280-560 bpm and working tool diameter of 170mm The HB 3600 is supplied with familiar Atlas Copco features including PowerAdapt, StartSelect and AutoControl, ContiLube© II, DustProtector II and VibroSilenced as well as the ProCare™ service contract.
PowerTech Canada Inc.
PowerTech Canada Inc. describes the PicBucket ® 5000 Series as an indispensable tool for concrete recycling plants. The company’s new percussion bucket, the PicBucket, is said to combine the power of a hydraulic hammer with the stripping strength and manoeuvrability of a conventional bucket. According to PowerTech, the PicBucket effectively disentangles piles of debris and broken pieces of concrete too large to feed the crusher. The 5000 Series is designed for excavators from 20 to 30 tonnes and is available in various sizes to meet the productivity needs of the different sites of crushing. The geometry of the bucket has been adapted to allow a loading capacity up to 2v3 while the power of the cell generates a percussion frequency of 980 bpm. Oil flow and pressure are controlled by a hydraulic block installed on the bucket and an automatic lubrication system helps maintain adequate protection of the shaft of the demolition tools. The different types of steel used in the manufacture of the bucket provide robustness and are said to prevent premature wear due to abrasion of concrete. The unique design of the demolition tools plus the power of the hydraulic cell means that the material’s natural breaking point is reached faster and more easily.
The PicBucket 5000 Series is the most powerful percussion bucket developed by PowerTech to date and follows the series 1000, 2000 and 3000 already on the market. The range adapts to the carriers of 3.5 to 30 tonnes. PowerTech adds that PicBucket technology enables users to realize substantial productivity gains in the execution of various construction tasks, especially excavation, demolition, stripping, backfilling and compacting.
BTI – Breaker Technology (BTI) introduces BXR 160 ‘powerhouse’
At 16,000 ft-lbs, the BXR160 is designed for rugged, continuous duty for use in demanding breaking applications. The BXR 160 offers an extra long stroke design, says BTI, which improves the power-to-weight ratio of the breaker, providing the widest carrier range (120,000 to 220,000 pounds) and power available. Precise tolerances between the piston and cylinder provide high efficiency, blow rate and power. Large cross section upper and lower shock absorbing isolators reduce vibration feedback to the carrier. BTI’s exclusive front head restraint system tightly guides the front head within the housing, reducing loading to the tie rods and the upper portion of the breaker. A narrow box housing design is well suited to tight trenching conditions. The BXR160’s tool diameter is 203 mm and its working weight of 5444 kg may vary depending on the bracket. Flow range is from 322 to 454 l/m. The frequency range is manually controlled via a hydraulic piloted stroke control and includes 260 to 425 bpm in long stroke mode (high impact) and 340 to 530 bpm in short stroke mode (high frequency).