Your Best Choice for In-Pit Crushing

INDUSTRY: Mining, Aggregates • material type: Hard Rock

Wheeled Jaw Plant Model

4248j-w

This jaw plant is designed for in-pit crushing, high capacity applications and provides unmatched production and reliability in the market. It features an optional hammer and hopper extensions capable of handling large front end loaders or trucks and is specifically designed to handle 1000+ tons per hour making sure there is enough capacity in the hopper and conveyor to be able to obtain this.

4248j-w BROCHURE
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Highlights

Capable of handling large front end loaders or trucks

8-foot step grizzly

Optional: tire bulkheads (not pictured)

An extra heavily ribbed steel frame-stress relieved after welding and before machining

One piece steel pitman

Oversized tapered roller bearings in both the pitman and frame. Tapered roller bearings exhibit a greater load carrying capacity compared to an equal sized spherical roller

Two heavy-duty flywheels, one grooved for V-belts

(4) hydraulic leveling jacks optional

The large rugged size of the hopper and feeder result in them being separate components for install, dismantle and transport.

54-inch wide discharge conveyor

The Lippmann Edge

oversized shaft

Oversized Shaft, Dynamically Balanced Flywheels

All Lippmann heavy-duty jaw crushers feature an oversized, heat treated shaft forged of special alloy to provide an exceptionally large eccentric throw. These heavy-duty shafts are paired with two dynamically balanced flywheels, effectively reducing vibration on both portable and stationary crushers. The overhead eccentric configuration does not rely on gravity alone to move material through the chamber. Rather, the inward and downward movement of the swing jaw provides for a forced-feeding motion to maximize output. All shafts are machined and put through a rigorous inspection process before they enter production.
roller bearing

Tapered Roller Bearing for Optimized Bearing Life

In order to optimize bearing life, only tapered roller bearings are used in Lippmann jaw crushers. The tapered bearings offer a combination of features that spherical bearings are unable to provide. When considering the adjustable clearance, line contact, true rolling motion and ability to carry both radial and thrust loads, the tapered roller bearing is an obvious choice for all jaw crushers. Lippmann proudly stocks a large inventory of all bearing sizes.
hytoggle

Hydraulic Toggle Reduces Setting Time

The automatic hydraulic toggle has greatly reduced the time it takes to change a jaw crusher’s setting. As jaw dies wear, the hydraulic toggle can be easily adjusted to maintain a constant closed side setting (CSS) while in continuous operation. An added benefit of the Lippmann hydraulic toggle package is the ability to provide tramp release once an un-crushable has entered the crushing chamber. In the case of a tramp event, manual or automatic reset of the CSS can be achieved by reducing the feed and closing the jaw on the fly. Nitrogen and Air Bag tensioning systems are available on all mid-sized to large model jaw crushers.

Reversible Jaw Dies for Longer Life

All standard Lippmann jaw dies (stationary and moving) are reversible. They can be flipped from end to end as necessary to get better lifespan out of them. The corrugated design that is centred about the jaw crusher allows this. Lippmann uses a peak to valley arrangement to break the rocks, using shear rather than direct compression.
oil bath lube

Oil-Bath Lubrication System

The Lippmann automatic lubrication system (Autolube) can deliver a continuous oil bath to any of the Lippmann jaws. This gravity return system feeds portions of oil to the swing jaw barrel and the frame bearings. There are sight glasses for each return line giving a direct visual of the quality and quantity of oil being delivered. An internal filter removes any contaminants while running. All Autolubes come with an immersion heater for cold environments. Also, there is a low-pressure interlock that can be used in conjunction with an alarm, turn off equipment, etc. Other visual checks that come with the Autolube are operating pressure, external oil level sight glass, and a thermometer for reading the oil temperature.
taper edut

Taper Lock

The Lippmann Taper-lock package makes lengthy, close-side setting adjustment a thing of the past. This tool-free system allows the operator to add shims to Lippmann manual toggle jaw crushers in a matter of minutes. Increased coverage of the toggle block in extreme applications is an added benefit incorporated in the retrofit design. The taper-lock system is available as a retro-fit to existing crushers and can be installed on new production crushers.
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Safety at Every Step

Lippmann prioritizes safety within our equipment design. This includes: engine safety shutdown systems, full safety guarding on all nip points, tagout capability on isolator, startup siren and emergency stops.

Standard Features & Options

  • Extra-heavy ribbed steel frame is stress-relieved after welding and before machining
  • One-piece steel pitman
  • Heat-treated forged alloy steel eccentric shaft
  • Manual toggle adjustment
  • Bolt in replaceable toggle bearings
  • Oversized tapered roller bearings in both the pitman and frame. Tapered roller bearings exhibit a greater load carrying capacity compared to an equal sized spherical roller
  • Reversible manganese steel jaw dies and extensions
  • Manganese steel cheek plates
  • Swing jaw barrel protector
  • Replaceable wear plate behind the swing jaw die & stationary jaw die
  • Automatic Oil Lubrication System which delivers a metered flow of filtered oil to each bearing
  • Two heavy-duty flywheels, one grooved for V-belts
  • 10′ grizzly section
  • Hydraulic leveling jacks – (4)
  • NEMA 12-motor control center
  • Hopper extensions (only non-folding)
  • Hydraulic toggle
  • Taper lock
  • Tire bulkheads

Technical Specs

4248j-w SPECIFICATIONS
Jaw Crushers42″ x 48″
RPM220 rpm
Feed Size38″
Discharge Conveyor54″
Operating Speed (loaded)830 rpm
Feeder56″ x 26′
Feeder Operating Speed – Max830 rpm
Grizzly Length8′ Step
CLOSED SIDE SETTING (CSS) INCHES
INCHES
4386-489
4.5441-550
5489-595
12*1069-1178
14*1179-1309

*Manual toggle plate option only
See page 2-10 from the Lippmann Jaw Book for values
4248 can be set from 4” to 8” (14” toggle plate only)

HORSEPOWER
Jaw Crusher250
Autolube1
Toggle Power Unit (optional)7
Taper Wedge (optional)1
Feeder75
Discharge Conveyor30
TRANSPORTATION (LBS)
Tires 315/80R22.5
Rear Axle 66,500
King Pin 33,500
TOTAL 100,000
Weight of Feeder Module 52,000
Weight of Jaw 136,000
Fall Off Load 54,000
TOTAL WEIGHT 342,000

Lippmann reserves the right to make changes to the information and design of the machines on this website without reservation and notification to the users. Information at time of publication is considered accurate – Lippmann assumes no liability resulting from errors or omissions in this document. 

Diagrams

4248j-w
4248j-w Drawings

Diagrams show optional hopper extensions.

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3271 E Van Norman Ave
Cudahy, WI 53110 USA

Call Us: 1 800 648 0486

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