With more horsepower,
versatility, and reverse crushing action, today’s jaw crushers
pack some bite.
Grasan
Independent hydraulic legs
 Grasan’s
road-portable and pit-portable jaw crushing plants are available in
a full range of sizes with various crusher brands and diesel or
electric power. Chassis frames are built with high-strength,
wide-flange steel beams. Hoppers for the plants use a 3/4-inch plate
wall construction with heavy angle reinforcing and are available
with 3/8-inch wear liners. Grizzly feeders come standard with
hydraulic hydrostatic drive for variable speed control. Discharge
conveyors feature heavy-duty construction with impact bed sections
under the crusher. A variety of axle configurations also are
available to meet state-specific loading requirements, and most
plants can be equipped with a skid-on, skid-off hopper feeder module
for over-the-road weight reduction and fast plant setup. Complete
electrical packages are available with a starter panel, wiring,
quick disconnects, and remote operator control station.
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Telsmith
Aggressive crushing action
 Telsmith,
Inc.’s Model 3258 Jaw Crusher offers higher production rates and
lower costs per ton when processing the most severe-duty hard rock,
or when tackling demolition debris applications, according to the
manufacturer. The crusher’s heavy-duty design features a 32- by
58-inch feed opening and a long crushing chamber with shallow nip
angles to deliver aggressive crushing action and consistent
high-capacity throughput. It is suitable for both stationary
operations and for mounting on portable plants. It incorporates a
hydraulic adjustment and overload protection system that uses a
moving toggle beam as standard equipment. The hydraulic system
positions the toggle beam and holds the crusher setting, while
hydraulic tensioning cylinders hold proper toggle tension through
the entire adjustment range. Overload protection is automatic.
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Metso Minerals
No need for shims
 Metso
Minerals has made a number of enhancements to its Nordberg C145
jaw crusher. The crusher is 55 inches wide with a 44-inch opening
and can handle feed — from broken concrete to hard rock and gravel —
up to 35 inches. A new hydraulic setting adjustment system moves the
crusher’s setting wedges, eliminating the need for shims and saving
time when changing from one product to the next, according to the
company. A new hydraulic tension rod also keeps the toggle plate
firmly in place and needs no adjusting when the setting is changed.
A new mounting system has been added that keeps the jaw still while
sitting atop vibration-dampening pads. Alignment in the X and Y axes
is now accomplished with dense, resilient dampers, and through
bolts. The power rating also has been increased from 250 to 300
horsepower.
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Lovejoy Inc.
Eliminates thrown belts
Lovejoy Inc.’s ROSTA oscillating mounts may
be used in both portable or standard quarry operation and supply
both acoustic and vibration isolation under the harshest conditions,
the manufacturer says. The design of the mounts eliminates any
metal-to-metal contact or friction. They also assist with
stabilizing the shaker screens or feeder stations that work in
tandem with jaw crushers. New motor bases also have been installed
with the units, keeping belts from being thrown off and eliminating
potential danger of equipment breakdown due to thrown belts.
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Lippmann
Hydraulic adjustment system
 Lippmann’s
Model 5062 jaw crusher is specifically designed for heavy-duty,
high-volume aggregate crushing applications. The crusher uses an
oversized, heat-treated eccentric shaft made of special alloy to
handle overloads and hard material; extra-large, radial-thrust
tapered roller bearings; a one-piece cast pitman; and a durable
one-piece, stress-relieved frame.
The hydraulic adjustment system on the
machine saves time and allows the setting to be adjusted while
crushing — which ensures that properly sized material is produced,
according to the manufacturer.
A pressure-relief system safeguards from
uncrushable materials. This model features a true-feed opening,
better motion, a greater reduction ratio, and increased throughput
because of a non-choking, forced-feeding action that results from a
larger eccentric inward and downward movement of the swing jaw.
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Sandvik Rock Processing
High strength, low weight
 Sandvik
Rock Processing’s Jawmaster single-toggle crusher is high in
strength and low in weight. It has a deep, symmetrical crushing
chamber that optimizes the nip angle and crushing motion, according
to the manufacturer. The crusher also features an active feed
opening that increases material volume and allows for maximum
capacity, has a hydraulic on-the-fly adjustment for some models, as
well as a complete range of sizes for stationary and portable
applications. The crusher also has four roller bearings that are
grease-lubricated and has grease-filled labyrinth seals. An
almost-square feed opening is designed to accept large material
without blockage, while a thick, replaceable wearing plate protects
the top of the moving jaw from being damaged by the impact of feed
material. The jaw crusher is available in capacities ranging from 75
to 110 short tons per hour up to 885 to 1,160 short tons per hour,
with feed openings from 22 by 32 inches to 52 by 60 inches.
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Terex Pegson
10-foot high discharge
 Terex
Pegson’s 650 HA Premiertrak features a single-toggle jaw crusher
with hydraulic setting adjustment. The crusher has a feed opening of
26 inches by 4 inches, and the vibrating grizzly feeder is 14 feet
by 3 feet, 6 inches. The 15- by 8-foot hydraulic folding feed hopper
has up to 13 cubic yards gross capacity, depending on method of
feed. The on-plant product conveyor is 3 feet, 4 inches wide, and
has a discharge height of 10 feet, 9 inches as well as a hydraulic
raise/lower tail section. The 24-inch wide on-plant dirt/side
conveyor has a discharge height of about 7 feet. Canvas removable
dust covers are fitted at the head and beyond the magnet area.
Polyurethane belt-scraper blades come standard. Other standard
equipment includes a suspended, self-cleaning, overband magnetic
separator; dust-suppression sprays; heavy-duty tracks; and a
6-cylinder diesel engine. Several types of optional equipment are
available.
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Terex Finlay
Reverse crushing action
The new J-1175 single-toggle jaw crusher
from Terex Finlay is built around a 42- by 30-inch crusher chamber
and is fitted with a heavy-duty vibrating grizzly feeder with
automatic control, which regulates the feed into the crusher. It
also features a hydrostatic drive and reverse crushing action to
assist in clearing blockages. The spacing allows rebar and other
recycled materials to clear through the jaw chamber onto the
discharge belt, where they can be removed by the crossbelt magnet.
The crusher’s jaw adjustment is fully hydraulic, and a smart remote
control system incorporates all the crusher controls on a handset.
The 9.8-cubic yard hopper has hydraulically folding sides with wedge
clamps for fast setup. It also has a heavy-duty tracked
undercarriage. Other options include a bypass conveyor and belt
weigher. Transport dimensions are about 48 feet long; 9 feet, 6
inches wide; and 11 feet, 6 inches high.
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Komatsu America Corp.
One-touch adjustments
Komatsu America Corp.’s BR380JG-1 mobile jaw
crusher improves crushing performance with the addition of a
load-presetting, semi-automatic feeder and increased crusher
rotation speed. The crusher also incorporates a one-touch setting
adjustment. A fully automatic discharge setting adjustment system
makes it easy to change the jaw discharge opening, according to the
manufacturer. The machine is also said to feature the first
hydraulic protection mechanism in the world, which allows the
crusher to protect it when clogged or jammed with metal or
uncrushable debris. Equipped with a 180-horsepower engine, the
crusher has a production output of 55 to 265 tons per hour.
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Universal Engineering
Corp.
Deep crushing chamber
 The
Universal Overhead Eccentric Jaw Crusher from
Universal Engineering
Corp. features a deep crushing chamber, and long throw provides
sharp crushing action, according to the manufacturer. Radial toggle
action with a downward thrust force-feeds material, and reversible
jaws help to provide longer jaw life. The crusher is a rigid
one-piece fabricated base frame. Replacement key wedges and heel
plates secure the stationary jaw plate and prevent wear on the sides
of the crusher base, and reversible manganese jaw plates provide for
a severe-duty wear surface. Large, balanced flywheels also supply
continuous driving force to the crushing action. The single toggle
design incorporates a dual-purpose toggle plate that not only allows
for setting the discharge of the crusher, but is also designed as a
shear point to protect the crusher in the case of tramp iron. A
hydraulic toggle assembly is available as an option in lieu of the
standard toggle plate. The crusher is available in several model
sizes with capacities ranging from 5 to more than 2,000 tons per
hour.
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Reprinted from Aggregates Manager
Magazine
March 2006 |
