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.
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.
| NPK Model | U-45JR |
|---|---|
| Excavator weight (ton) | 45 – 50 |
| Operating weight (kg) | 4560 |
| Max. jaw opening (mm) | 1130 |
| Working pressure (MPa) | 30 |
| Oil flow (l/min) | 175 – 275 |
| Rotation pressure (MPa) | 14 |
| Rotation oil flow (l/min) | 20 – 30 |
| Force (at tip) (KN) | 1260 |
| Force (at centre) (KN) | 1740 |
| Model NPK | U-45JR |
|---|---|
| Opening time (sec) | 2.4 |
| Closing time (sec) | 3.0 |
| Total cycle time (sec) | 5.4 |
| Number of cycles (c/min) | 11 |
| Oil flow (l/min) | 275 |

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