Cruncher U-45JR

Cruncher U-45JR

The crushing cruncher

Compared to NPK® G-series, the new U-cruncher shows important differences: one big center tooth. Because of the center tooth, all forces are concentrated to one point, which makes the U-cruncher act also as a crusher. Besides that, the new model has a relatively longer cutter for cutting light steel structures, besides rebar. Another advantage is the 360 degrees hydraulic rotation, allowing great manoeuvrability. The U-cruncher is an ideal tool for crushing and cutting walls, floors and light steel structures, such as apartments, reinforced walls, etc.

High speed – extreme power

Like all NPK® crushers and crunchers, the U-model has the standard integrated booster system, a unique feature designed by NPK®. This booster system automatically activates whenever the jaws meet resistance. This pressure intensifier system has a relatively low oil flow and produces faster cycle times and more crushing strength. Additionally, other excavators functions remain uninfluenced. The integral booster allows a compact body design, reduces the total weight of the attachment and affords ease of maintenance.


  • Standard integrated booster system that automatically activates when the jaws meet resistance.
  • Center tooth: more crushing power.
  • Hydraulic rotation 360° for precise positioning.
  • High productivity and extreme power.
  • No additional pressure reduction is required in the hydraulic system.
  • Easy maintenance.
  • Bolt on Tooth plate: easy teeth replacement.
  • Large jaw opening.
  • Piston rod fully protected against damage.
  • Low oil flow – other functions of excavator are not influenced.
  • Short opening/closing time (5.4 sec.) in unloaded condition, produces 11 cycles a minute.
  • High productivity and extreme power.
  • Designed and produced by the world’s largest manufacturer of boom mounted attachments.
  • Standard rebar cutters.
  • Worldwide sales and product support network.


Model NPK U-45JR
Excavator weight (ton) 45 – 50
Weight (kg) 4560
Max. jaw opening (mm) 1130
Working pressure (MPa) 30
Oil flow (l/min) 175 – 400
Rotation pressure (MPa) 14
Rotation oil flow (l/min) 20 – 30
Max. force (A) (kN) 1260
Max. force (B) (kN) 1740


Model NPK U-45JR
Opening time (sec) 1.1
Closing time (sec) 2.0
Total cycle time (sec) 3.1
Number of cycles (c/min) 19
Oil flow (l/min) 400


Cruncher U-45JR


Concrete_Cruncher.pdf (989.55 KB)

Betonpulverisierer.pdf (988.24 KB)

Crocs_a_béton.pdf (426.21 KB)