The crushing cruncher
Compared to NPK® G-series, the new U-21JXR 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-21JXR cruncher is an ideal tool for crushing and cutting walls, floors and light steel structures, such as apartments, reinforced walls, etc.
The U-21JXR has an easy replaceable tooth plate on arm and frame. Due to these easy and quickly replaceable tooth plates, downtime has been reduced to a minimum.
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.
|Excavator weight (ton)||19 – 28|
|Max. jaw opening (mm)||800|
|Working pressure (MPa)||26|
|Oil flow (l/min)||100 – 250|
|Rotation pressure (MPa)||14|
|Rotation oil flow (l/min)||10 – 15|
|Max. force (A) (kN)||645|
|Max. force (B) (kN)||885|
|Opening time (sec)||0.6|
|Closing time (sec)||1.3|
|Total cycle time (sec)||1.9|
|Number of cycles (c/min)||32|
|Oil flow (l/min)||250|