• Rockster North America Inc., 551 Anderson Avenue, Hammonton, NJ 08037, USA

The compact crusher for versatile applications

The fully hydraulic, track-mounted impact crusher R900 is ideal for flexible recycling applications with asphalt, concrete and demolition debris. Furthermore it is equipped with a heavy duty rotor and therefore also used for jobsites with heavy virgin stones. The mobile crushing plant R900 guarantees highest performance at a very high crushing ratio.

Due to 2 hydraulically adjustable swing-beams, as well as variation of the rotor speed, the final grain can be optimally influenced. The quality of the hammers is chosen individually, depending on the application and can be used bilaterally. High quality wear materials ensure reduced wear.

Technical details

Inlet opening: 900 x 720 mm / 36 x 29 in
Rotor diameter: 1020 mm / 41 in
Rotor: 4 hammers
Crusher drive: hydrostatic
Swing beams: 2 (individually adjustable)
Gap adjustment: hydraulic
Performance: up to 240 t/h / 270 st/h
Drive unit: TIER3/TIER4f engine

Main discharge conveyor:
Width: 1000 mm / 40 in
hydraulically foldable
Discharge height: ~ 3,2 m / 10.5 ft

Side discharge conveyor:
Width: 500 mm / 20 in
hydraulically foldable
Discharge height: ~ 2,3 m / 7.6 ft

Basic equipment

Feedhopper (Hardox) – 4 m³ / 5.3 yd³
Vibration plate with pre-screener
Adjustable bypass chute (main/side conveyor)
Magnetic separator
Remote control
Crusher overload protection
Dust suppression

Transport dimensions

Length: 9,60 m / 31.5 ft
Width: 2,50 m / 8.2 ft
Height: 3,20 m / 10.5 ft

Weight: ~ 25,2 t / 55,600 lbs


  • Screening system
  • Onboard air compressor
  • Central lubrication
  • Main belt wear protection
  • Water pump
  • Belt weigh scale
  • Hammer exchange system
  • Customized painting
  • Main conveyor service device
  • DUPLEX-system

OPTION: Screenbox RS83 + return belt RB75


The screening system – consisting of the compact circular vibrating screen RS83 in combination with the return belt RB75 – is the perfect option for the track-mounted R900 to ensure 100% defined final grain.

RS83 Screenbox:

Screen surface: 1830 x 1200 mm / 6.0 x 4.0 ft
Standard mesh: 38 mm / 1.5 in
Special meshes on demand.

Discharge conveyor final grain:
Width: 800 mm / 32 in
Discharge height: ~ 3,2 m / 10.5 ft

RB75 Return belt:

Width: 400 mm / 16 in

Transport dimensions R900 with screenbox RS83 and return belt RB75:

Length: 14,10 m / 46.3 ft
Width: 2,50 m / 8.2 ft
Height: 3,25 m / 10.7 ft

Weight: ~ 28,6 t / 63,100 lbs

Patented DUPLEX system

One machine – unlimited possibilities!

The crusher units are especially designed to transform a jaw (R800) into an impact crusher (R900) and vice versa in only a few hours.
Therefore the plant can be optimized to the different requirements of the feeding material and guarantees a versatile operation.