The workhorses of the road repair and demolition
market come in all sizes and in 36 different brands.
John Deere
True hydraulic power and low recoil
 John Deere's five-model line of hydraulic hammers
ranges from 150 to 1,000 foot-pounds of energy per blow. The company
stresses that its hammers don’t use a high-pressure accumulator for power
like other designs, opting instead for a gas-assist cycle and using the
hydraulic system for most of the firing power. A low-pressure nitrogen
chamber cushions piston recoil to protect the skid-steer loader and operator
from recoil.
The hammers’ fully hydraulic design protects the
skid-steer hydraulic circuit so that no surge-damping accumulators are
needed.
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Caterpillar
Production hammer for larger excavators
 Caterpillar’s newest hydraulic hammer is the H160D
s, a 6,946-pound unit designed for use with carriers weighing 70,400 to
121,000 pounds and specifically for the Cat 330C and 345B II excavators. New
and improved features include an automatic shut off that turns the hammer
off when there is no material beneath it, a new accumulator design that
simplifies service, a screw adjustment for the pressure control valve that
allows pressure changes without removing the hammer from the host machine,
and an improved operating cycle with increased power and higher blow
frequency.
Caterpillar recommends the unit for construction, demolition and mining,
and aggregates applications.
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BTI
Severe-duty option introduced
BTI has rolled out a severe-duty application option
for their TB-XC series of boxed housing breakers. Cast abrasion strips and
wear-resistant plate can be ordered with a new unit or applied to working
units in the field. The company says the features provide exceptional wear
properties in extreme hard rock applications.
The TB-XC series ranges from the TB425XC in the
1,100-foot-pounds energy class to the TB2580XC in the 13,500-foot-pounds
class.
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Atlas Copco
Precision in a high-energy breaker
 Atlas Copco introduced the new MB 1000 this summer
for use with 12- to 20-metric-ton excavators. Designed for secondary
breaking in mines, and for demolition and tunnel construction, the
2,200-pound breaker features an AutoConrol system for precision control of
the percussion piston and automatic stroke-length switching. Other features
include an automatic lubrication system, a noise and vibration damping
system, and AutuStart, which makes the breaker easy to handle, particularly
in light, loose soil.
Atlas Copco now markets Krupp-engineered breakers in
North America. Krupp designs were marketed in North America by Allied prior
to this year.
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NPK
Full line offering
NPK markets a full line of hydraulic hammers,
ranging in operating weight from 235 pounds to 17,000 pounds. They feature a
gas charged piston to maximize hammer efficiency and employ just two moving
parts for reliability. Replaceable cylinder sleeves are said to allow for
easy, economical rebuilds.
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Allied
New series hits hard every time
Allied has added the S-Series to its line of Rammer
by Allied hammers. Designed for use with carriers ranging from 1,760-pound
skid-steer loaders or mini excavators, to 33,000-pound excavators, the
seven-model series ranges in size from the 180-pound Piccolo to the
1,830-pound S 29. Each S-series model is also available as a silenced City
model for quiet operation.
Features of the S-series include Rammer’s Constant
Blow Energy design which guarantees that all blows are at full power,
regardless of engine speed. The housing on the front end of the unit
eliminates wear of the most costly components. Five models are available in
“Uniram” format, a pin-mounting system that allows quick switching between
carriers and allows the unit to be tucked under a backhoe stick for easy
transportation.
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Tramac
Production breakers handle rock and concrete
 Tramac’s new V46 and V56 breakers can be mounted on
carriers ranging from 27 to 53 tons and from 35 to 65 tons, respectively.
The new units feature Tramac’s patented Tool Protection System, as well as
an automatic blow-control system and a patented pressure-regulator system.
Both are available with Metro Silencing, a sound suppression option for
noise-sensitive job sites.
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Bobcat
Hammers for compact machines
 Bobcat offers a line of four hydraulic breakers
designed for their lines of skid-steer loaders, backhoe loaders, and compact
excavators. Models range in size from the 320-pound B700 to the 935-pound
B1400.
The 150-foot-pound energy class B700 is compatible with Bobcat’s
smaller models, while the B850 (300-foot-pound energy class) and B950
(500-foot-pound energy class) cover the intermediate ranges, and the B1400
(875-foot-pound energy class) works with the larger models. Specific model
compatibilities and specifications are available at
Bobcat.com.
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Case
Power from fewer moving parts
Case introduced four new hammers early this year
ranging in impact energy ratings from 350 to 1,200 foot-pounds. The units
have only two moving parts, and Case says this ensures dependability and
easy maintenance. Case says the new units provide higher blows per minute
than rival models and use a low-pressure nitrogen charge to cushion recoil
on the rebound stroke to reduce wear and tear on the carrier.
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Huskie
New series gets a power surge
Huskie Hydraulic Hammers rolled out its new Series
II breakers late last year. They range from 200 to 1,200 foot-pounds in
impact energy. Several models in the new line sport higher impact energies
than their Series I predecessors, and all models offer improved
serviceability due to a significant reduction in parts, according to Huskie.
The power surge comes from a redesign of the operating piston, main valve
and internal porting, and a slight increase in the low-pressure nitrogen gas
charge.
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Loegering
More power, less size
Loegering claims its line of breakers designed for
use with skid-steer loaders generates more power per pound of operating
weight than competing models. According to a company spokesman, “In most
cases, you would have to go up one size or class (in a competing line) to
get the same performance, which would mean spending more money to get the
same result.”
Models range in operating weight from 430 to 1,100
pounds and in AEM energy ratings from 70 to 468 foot-pounds per blow. A
patented valve system is said to use less oil to do the same job as higher
flow breakers. Loegering units are said to be shorter than rival models and
can work submerged in water.
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Stanley
Big, quiet breakers hit hard
 Stanley markets a full line of hammers, from less
than 200 pounds in operating weight to more than 7,000. Their large hammers,
the eight-model Stanley EXS Stealth Mounted Breakers, carry impact ratings
from 1,500 foot-pounds to 12,000 foot-pounds and feature innovations in
noise suppression as well as a narrow profile, enclosed housing, an armored
lower end, and lighter operating weights.
The
Stanley design uses a powercell suspended in a
system of bumpers and wear plates to prevent damaging shocks from being
transmitted to the carrier. The housing is double strength at the lower end
of the unit to stand up to abuse.
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Reprinted from Better Roads Magazine
August 2004 |
