Cruncher U-21JR

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The crushing cruncher

Compared to NPK® G-series, the new U-21JR cruncher shows important differences: one big center tooth and a center cutter. 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 center cutter for cutting light steel structures, besides rebar. Another advantage is the 360 degrees hydraulic rotation, allowing great manoeuvrability. Together with the center tooth and cutter the U-21JR 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

As 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.
  • Standard center cutter for rebar and light steel structures.
  • No additional pressure reduction is required in the hydraulic system.


Model NPKU-21JR
Excavator weight (ton)19 - 28
Operating weight (kg)2225
Max. jaw opening (mm)800
Working pressure (MPa)26
Oil flow (l/min)100 - 200
Max. force (A) (kN)645
Max. force (B) (kN)885
Voltage (V)-
Dimensions magnet (mm)-
Power (kW)-





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