Model Excavator weight (ton) Operating weight (kg)
Cruncher G70 6 – 10 690
Cruncher G120 10 – 17 1165
Cruncher G-18JX 17 – 22 2150
Cruncher G-28J 25 – 38 2960
Cruncher G-25JEH 19 – 28 2650
Cruncher G-35JEH 29 – 48 3550
Cruncher G-45EH 45 – 50 4500
Cruncher U-21JXR 19 – 28 2325
Cruncher U-31JXR 29 – 48 3455
Cruncher U-45JR 45 – 50 4560

G-series: The secondary concrete cruncher

The NPK® G-series cruncher are specially designed to reduce oversized concrete pieces from a ground level after they have been demolished. Simultaneously the reinforced steel will be separated from the concrete on site! This results in a significant reduction of transport costs and recycling becomes much more efficient.

U-series: The primary and secondary concrete cruncher

The NPK® U-series cruncher shows important differences compared to the NPK® G-series: one big center tooth and a center cutter (U-21JXR) 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 U-21JXR and U-45JR have a relatively longer cutter for cutting light steel structures, besides rebar. Another advantage is the 360 degrees hydraulic rotation (R), allowing great manoeuvrability. Together with the center tooth and cutter 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 G- and U- series have 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.

Bolt on teeth

Several NPK Crushers have a easy replaceable Tooth Plate:
“J”-Type models have a replaceable tooth plate on the arm.
“X”-Type models have a replaceable tooth plate on the frame.
“JX”-Type have both.


  • 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 on U-21JXR for rebar and light steel structures.
  • No additional pressure reduction is required in the hydraulic system.


New demolition grab DG-25

The DG-25 fulfil the demand for a model between DG-20A and the DG-30A. Read More

Product info DG-30A and DG-40A

New design leads to increased durability After more than 10 years of successful Read More


The NPK Powerbooster can be explained in 4 steps, as described above. As soon as the jaws meet resistance the extra speed is changed to extra power. Without concrete in the jaw, the booster creates more speed.

Read more about NPK technologies