Rock Breaker Boom


The Earl’s boom is a high strength articulating structure designed to manipulate hydraulic breaker hammers, rock grapples, and rock points. It consists of the following major components; base mount, boom foot swivel, boom, stick and tool mount.

Design

  • The boom design is robust, using oversize pins and bushings at all joints.
  • A centralised lubrication system maintains a steady flow of grease to every rotating joint.

Power Supply

  • Power is provided by a remote hydraulic power pack and most installations have remote controls running to an operator’s booth.

Motion

  • The motion of the boom is driven by hydraulic cylinders with the exception of the swing motion that uses a double ended cylinder driving a large rack and pinion.

Boom Weight:

  • 10,886 kg/24,000 lbs (no hammer)

Maximum Hammer Weight:

  • 3,175 kg/7,000 lbs

Hydraulic Specs:

  • Supply Pressure – 18.6 MPa/2,700 psig (boom only)
  • Supply Flow Rate – 140 lpm/37 USGPM (boom only)
  • Oil Type – Century Centraulic AF32 or equivalent
  • Filtration – Oil filtered to 10 microns on return and pressure lines (minimum requirement)

Boom Reach:

  • Horizontal – 10.5 m/34’6″ (no hammmer)
  • Vertical – 5.75 m/18’10” (no hammer)

Lubrication System:

  • Fully automatic (series progressive style) lube system including lube pump, control system, and individual feeders.

Paint:

  • 3 Coat System (Devoe)
  • Inorganic Zinc Primer
  • Epoxy Intermediate Coat
  • Aliphatic Polyurethane Top Coat
EARLS Rock Breaker Boom
EARLS Rock Breaker Boom Hydraulics
EARLS Rock Breaker Boom Hydraulics
EARLS Rock Breaker Boom Hydraulics
EARLS Rock Breaker Boom End Assembly
EARLS Rock Breaker Boom Base
EARLS Rock Breaker Boom Base
EARLS Rock Breaker Boom
EARLS Rocker Breaker Boom
EARLS Rock Breaker Boom
Click images below to download a pdf copy of the product brochure.