For the secondary and fine crushing of medium-hard, brittle materials—such as limestone, coal, coal gangue, and gypsum—the PCK series reversible hammer crusher performs the work of a traditional two-stage "jaw crusher plus impact crusher" setup using just a single machine. The rotor operates in both forward and reverse directions, allowing both sides of the hammer heads to wear evenly; this cuts the frequency of system shutdowns for hammer replacement in half.
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Reversible hammer crusher is a highly efficient and multi-purpose crushing equipment, mainly used for coarse and medium crushing of medium hardness and brittle materials.
The reversible hammer crusher (PCK series) is a secondary and fine crushing machine featuring a rotor capable of bidirectional rotation. It is specifically designed for medium-hard, brittle materials like limestone, coal, coal gangue, and gypsum. It accepts feed sizes up to 140mm, produces adjustable output sizes of 15mm or less, and offers capacities ranging from 25 to 350 t/h.=
Traditional hammer crushers feature rotors that rotate in only one direction, meaning the hammer heads always strike the material on the same side—leading to wear-related failure on that side after just 200–300 hours. The PCK rotor can switch between forward and reverse rotation; once one side wears down, the machine switches to the other side, effectively doubling the service life of a single set of hammers to 500–700 hours. This reduces the annual number of shutdowns for hammer replacement by half.
If high-moisture material causes slight clogging of the screen plate, the machine can automatically clear the blockage by running in reverse for 2–3 minutes; the reverse-moving hammers break up and discharge the material stuck in the screen holes. No manual intervention or machine disassembly is required.
Taking an 80 t/h limestone processing line as an example: while a traditional setup requires a three-stage configuration—jaw crusher, impact crusher, and hammer crusher—the PCK1212 single-unit solution can handle the entire process on its own.
medium hardness crusher
coal crusher
limestone crusher
PCK hammer crusher
Recommended models: PCK1012 (70–90 t/h) or PCK1212 (90–120 t/h), paired with a 2YK1860 vibrating screen.
Actual output data (limestone, 1.6 t/m³):
• 0–5mm finished sand: 55–65%
• 5–10mm aggregate: 20–25%
• 10–15mm aggregate: 10–15%
Overall sand yield: ≥75% (including recirculated material)
Industry background: Flue-gas desulfurization (FGD) systems in coal-fired power plants have strict requirements for limestone powder particle size—typically requiring 90% to pass through a 325-mesh (44μm) screen. Limestone powder preparation is the upstream stage of the desulfurization system, with annual demand reaching tens of millions of tons.
Why choose PCK for fine crushing:
• Produces uniform output (≤10mm), providing ideal feed size for ball mills—reducing feed size by 5mm lowers ball mill power consumption by 8–12%
• Hammer heads wear on both sides, minimizing the impact of maintenance on continuous desulfurization feed supply
• Recommended models: PCK1214 (120–150 t/h) or PCK1416 (160–250 t/h), suitable for 200–300 MW power units
Industry background: Coal and coal gangue often exhibit significant fluctuations in moisture content (5–15%), making them "nightmare materials" for traditional crushing equipment—causing chamber clogging, material adhesion, and sharp drops in output. The reversible hammer crusher's reversing mechanism for clearing blockages offers a distinct advantage in this scenario.
Recommended models: PCK1212 or PCK1214. Coal has a low density (0.8–1.4 t/m³); consequently, the actual processing capacity of the same machine model is 10–30% higher when handling coal compared to limestone.
Key Data:
• No downtime required for clearing blockages when moisture content is ≤15%.
• The proportion of coal fines (≤3mm) produced can be precisely controlled via screen plate aperture size.
• Recommended hammer material: High-manganese steel (ZGMn13) rather than high-chromium cast iron (as the sulfur content in coal is corrosive to high-chromium cast iron).
Industry Context: Gypsum board, gypsum powder, and cement retarder applications require a gypsum particle size of 0–15mm, while minimizing the generation of excessive ultra-fine powder (which increases dust and material loss). Reversible hammer crushers offer distinct advantages in this scenario due to their high reduction ratio and controllable output size.
Recommended Models: PCK1010 (35–70 t/h) or PCK1012 (70–90 t/h); these models cover the mainstream capacity requirements for small-to-medium-sized gypsum plants.
Industry Context: The resource utilization rate of construction waste in China has risen to approximately 55% (Ministry of Housing and Urban-Rural Development, 2024). Brick-concrete construction waste is characterized by low hardness but contains rebar, placing high demands on the crushing equipment's impact resistance and blockage-clearing capabilities.
Important Considerations: Construction waste must pass through an iron remover to extract rebar before entering the PCK crusher to prevent rotor entanglement. Recommended hammer material: High-manganese steel (offering good toughness and impact resistance) rather than high-chromium cast iron (which is brittle and prone to fracturing upon contact with rebar).
Reversible hammer crusher features large impact force and high efficiency of crushing, it is widely used in power, metallurgy, construction material, the chemical industry, etc. for fine crushing of coal and rock with hardness less than 150MPa.
• The material enters the crushing chamber from the feed port, and the high-speed rotating rotor drives the hammer to perform the first impact crushing on the material.
• After the hammer collides with the material, the material is crushed or thrown onto the impact plate on the inner wall of the crusher for further crushing.
• When one side of the hammer is worn, the other side of the hammer can be reversed to continue working without immediately replacing the hammer, which significantly improves the equipment utilization rate.
• The crushed material is discharged through the gap of the sieve plate at the bottom, and the particle size is controlled by the sieve plate aperture (usually 3~30mm).
• Substandard materials continue to remain in the chamber until they are repeatedly crushed to a qualified size by the hammer.
| Model | Rotor Size （mm） | Feeding Size (mm) | Finished product size (mm) | Capacity (t/h) | Motor Power （kw） | Overall Dimension (mm) |
| PCK1007 | φ1000×700 | ≤80 | ≤15 | 25-40 | 75 | 2670×1665×1700 |
| PCK1010 | φ1000×1000 | ≤80 | ≤15 | 35-70 | 110 | 2670×1965×1700 |
| PCK1012 | φ1000×1250 | ≤80 | ≤15 | 70-90 | 132 | 2670×2215×1700 |
| PCK1214 | φ1250×1400 | ≤100 | ≤15 | 120-150 | 250 | 2830×2490×2200 |
| PCK1416 | φ1400×1600 | ≤120 | ≤15 | 160-250 | 400 | 3205×2845×2400 |
| PCK1618 | φ1600×1800 | ≤140 | ≤15 | 280-350 | 450 | 4550×3250×2680 |
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A normal hammer crusher runs one way, so hammers wear on one side and last only 200–300 hours. The PCK rotor spins both forward and reverse. Flip the direction when one side wears, and you use the other side too — hammer life jumps to 500–700 hours, and replacement shutdowns are cut in half.
Secondary and fine crushing of medium-hard, brittle materials under 150 MPa: limestone, coal, coal gangue, gypsum, phosphogypsum, and brick-concrete recycled aggregate. Common uses: manufactured sand and aggregate lines, limestone powder for power-plant desulfurization, and coal prep plants.
No. At 5–15% moisture, traditional crushers plug their screen plates. On the PCK, just run it in reverse for 2–3 minutes — the reverse hammers clear the blocked holes and discharge the material. No manual cleanup, no disassembly, no downtime.
- Feed: up to 140 mm (model-dependent; ≤60 mm on PCK0808, ≤140 mm on PCK1618)
- Output: 15 mm or less (screen-plate controlled, usually 3–30 mm)
- Capacity: 25–350 t/h across nine models. Examples: PCK1212 = 90–120 t/h; PCK1416 = 160–250 t/h.
Figures vary with material, feed size, and target fineness.
Often, yes. A single PCK handles what used to need a two-stage jaw + impact setup, cutting primary equipment investment by 40–60%. On an 80 t/h limestone line, a three-stage jaw-impact-hammer train can be replaced by one PCK1212. Send us your material, feed size, and target capacity — we'll confirm if single-stage works.
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