The hydraulic open-box crusher is an upgraded version of traditional fine crushers (such as cobblestone sand making machines), featuring a hydraulic power-assist system as its core highlight. This equipment operates on the "rock-on-rock" or "rock-on-iron" autogenous crushing principle. It uses hard alloy hammers mounted on a high-speed rotating rotor to shatter the materials, while the fine crushing and shaping are achieved through the rebound against the liner plates and the mutual collisions of the materials within the crushing chamber. Additionally, the discharge particle size can be flexibly controlled by adjusting the gap of the bottom grate bars.
| Model | PLF800 | PLF1000 | PLF1250 | PLF1500 | PLF1800 |
| Rotor diameter (mm) | φ 650 | φ 850 | φ 1100 | φ 1350 | φ 1650 |
| Cylinder height (mm) | φ 800 | φ 1000 | φ 1250 | φ 1500 | φ 1800 |
| Spindle speed (r/min) | 1100 | 980 | 780 | 750 | 750 |
| Feed size (mm) | 50 | 80 | 120 | 120 | 120 |
| Yield (t/h) | 10-15 | 25-40 | 30-60 | 40-80 | 50-100 |
| Equipped with power (kw) | 4p-22 | 4p-45 | 4p-75 | 6p-132 | 6p-230 |
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