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Product Description
The Chenxing CX Series Single Shaft Shredder is purpose-built for high-hardness, high-toughness materials that conventional shredders cannot handle. Available in six models from the compact CX-2455 (400 kg/h) to the massive CX-75160 (1,300 kg/h), the CX Series delivers reliable size reduction for scrap metals, rigid plastics, engineering plastic purgings, wood pallets, rubber, and WEEE (Waste Electrical and Electronic Equipment) housings.
At the core of the CX Series lies a fully forged solid 42CrMo alloy steel rotor (Φ275–350 mm) manufactured on a CNC machining center in a single setup. This ensures absolute concentricity of knife mounting surfaces and exceptional resistance to bending and torsional fatigue under high-impact loads. Unlike welded hollow shafts found on light-duty machines, the CX forged solid rotor is engineered for a service life measured in decades, not years.
Complementing the rotor, the CX features a hydraulic ram feed system with adjustable thrust, a vertical hopper with pneumatic safety cover for operator protection, and an external guide mechanism that enables zero-maintenance linear motion of the moving chamber. A custom-programmed PLC controller with touchscreen HMI manages start, stop, forward, reverse, and automatic overload reverse-return logic to prevent damage to working components.
The CX Series functions as a complementary line to Chenxing's XB-L Series (soft material single shaft shredders), covering the full spectrum of industrial size reduction needs.
| Shredder Model | Shaft Diameter (mm) | Moving Knives (pcs) | Fixed Knives (pcs) | Max Capacity (kg/h) | Motor Power (kW) | Chamber Size L×W (mm) | Weight (kg) | Dimensions L×W×H (mm) |
|---|---|---|---|---|---|---|---|---|
| CX-2455 | 275 | 24 | 1 | 400 | 22 | 780×550 | 3,600 | 3,250×1,500×2,350 |
| CX-3063 | 275 | 30 | 1 | 500 | 30 | 780×670 | 4,000 | 3,250×1,750×2,350 |
| CX-3980 | 275 | 39 | 1 | 700 | 37 | 1,000×870 | 6,000 | 4,150×1,900×2,450 |
| CX-48100 | 315 | 48 | 1 | 900 | 45 | 1,200×1,060 | 8,000 | 4,700×2,550×2,650 |
| CX-57120 | 315 | 57 | 2 | 1,200 | 55 | 1,400×1,260 | 9,500 | 5,350×2,850×2,760 |
| CX-75160 | 350 | 75 | 2 | 1,300 | 75 | 1,800×1,650 | 12,000 | 5,900×3,050×2,960 |
| Component | Specification |
|---|---|
| Rotor (Main Shaft) | Fully forged solid 42CrMo alloy steel, Φ275–350 mm (model-dependent). CNC machining center single-setup precision machining. Optimized heat treatment for maximum bending and torsional fatigue resistance under continuous high-impact service. |
| Moving Knives (Rotors) | Alloy tool steel: H13 D2 SKD-11, hardness HRC 58–62. Trapezoidal knife-seat design with full-surface contact mounting for superior load distribution and impact transfer. |
| Fixed Knives (Stators) | D2 / SKD-11 tool steel, matched hardness. Single or dual fixed knife configuration (1 knife on CX-2455 through CX-48100; 2 knives on CX-57120 and CX-75160) with precision-ground cutting edges. |
| Hydraulic Ram Feed | High-thrust hydraulic cylinder with adjustable forward pressure and stroke. Continuously pushes hard material in the chamber toward the rotor, maintaining steady throughput regardless of material density. |
| External Guide Mechanism | Guide blocks for the reciprocating chamber positioned externally on the machine frame. Grease lubrication points are fully accessible without disassembly — enabling true zero-maintenance operation and eliminating production stops for guide servicing. |
| Vertical Hopper & Pneumatic Safety Cover | Vertical-feed hopper design ensures positive material intake. Pneumatic-actuated safety cover opens for loading and closes during operation to prevent ejected debris. Complies with operator safety requirements for heavy-duty size reduction equipment. |
| Transmission System | Direct coupling between motor and heavy-duty gear reducer via flexible coupling with shear-pin protection. Eliminates belt slippage, reduces vibration transmission to the rotor shaft, and protects the reducer from shock overloads. |
| Heavy-Duty Gear Reducer | Industrial-grade parallel shaft / bevel-helical reducer (brand-matched to motor power), high reduction ratio for high-torque low-speed rotor operation. Designed for continuous-duty cycle with oil-bath lubrication. |
| PLC Control System | Custom-programmed PLC with color touchscreen HMI. Functions: start stop forward jog reverse jog automatic overload reverse-return sequence. Overload protection: torque exceeds preset threshold → automatic dual-shaft reversal to eject the unshreddable object → timed delay → automatic forward resumption. |
| Replaceable Screen | Perforated discharge screen with selectable aperture range. Determines final particle size. Interchangeable screen panels allow quick reconfiguration for different output specifications. |
| Main Motor | IE3 IE4 high-efficiency three-phase asynchronous motor (Chinese premium brand or optional European brand: Siemens ABB). IP55 protection rating, Class F insulation. Power range: 22–75 kW across the six models. |
| Machine Frame | Heavy-duty welded steel frame, stress-relieved after fabrication. Integrated mounting pads for rotor bearing housings, reducer, motor, and hydraulic power unit. Designed for minimal vibration transfer to the factory floor. |
Forged Solid Alloy Rotor — Never Crack. The entire main shaft is forged from a single 42CrMo billet and finished on a CNC machining center. No weld seams, no stress risers, no fatigue failure points. Φ275–350 mm solid cross-section handles hard-material impacts that would destroy hollow or fabricated shafts.
Whole Chamber Moves, Zero Feeding Limit. The entire charging chamber reciprocates axially, drawing material into the cutting zone from all angles. Combined with hydraulic ram assist, the design eliminates bridging and jamming — even with irregularly shaped scrap.
External Guide = Zero Maintenance. The guide blocks that control chamber reciprocation are mounted on the outside of the frame. Lubrication is performed externally without stopping production or opening the machine. No buried grease points, no overlooked maintenance intervals.
Coupling-Direct Drive Transmission. Motor-to-reducer connection via flexible coupling transfers power with near-zero loss. No belt slippage under surge loads. Shear-pin or torque-limiting protection isolates the reducer from catastrophic overloads.
Trapezoidal Knife-Seat Face-Contact Mounting. Moving knives seat into precision-machined trapezoidal pockets on the rotor. Load is transferred across the full mounting face, not concentrated on bolts. This design survives sustained high-impact shredding of metals and dense engineering plastics.
PLC with Automatic Overload Reverse. When the rotor encounters an unshreddable object, the PLC detects the torque spike, automatically reverses the rotor to eject the obstruction, pauses briefly, and resumes forward rotation — all without operator intervention.
Pneumatic Safety Cover for Operator Protection. The vertical hopper is equipped with an air-actuated safety lid. It opens during loading and seals closed during shredding, containing debris and preventing access to the rotor zone while the machine is running.
Scalable Six-Model Lineup. From 400 kg/h (CX-2455, 22 kW) to 1,300 kg/h (CX-75160, 75 kW), the CX Series covers small-to-medium recycling operations through large-scale industrial plants with a single, consistent design philosophy.
The CX Series excels at primary size reduction and volume reduction of hard materials:
| Material Category | Examples |
|---|---|
| Scrap Metals | Aluminum profiles, scrap aluminum, scrap copper, light-gauge scrap steel |
| Rigid Waste Plastics | PVC pipes, PPR pipes, HDPE drums, ABS appliance housings, PC sheets |
| Engineering Plastic Purgings | Injection molding sprues, runners, lump purgings, off-spec parts |
| Waste Wood | Pallets, construction formwork, timber offcuts |
| Waste Rubber | Tire blocks, rubber sheets, conveyor belt scrap |
| WEEE (E-Waste) | Rigid plastic housings from dismantled electronic appliances |
| Waste Paper / Cardboard | Corrugated cardboard bales, paper mill rejects |
Material Loading. Operator loads hard material into the vertical hopper. The pneumatic safety cover opens for loading access.
Safety Cover Closure. Pneumatic safety cover closes and seals the hopper, preventing ejected debris.
Hydraulic Ram Feeding. Hydraulic ram pushes material from the chamber toward the rotating rotor at an adjustable feed rate.
Rotor Shear Shredding. Forged solid rotor with hardened alloy knives shears material against the fixed knife(s). Whole chamber reciprocates axially to distribute wear and feed evenly.
Screen Classification & Discharge. Shredded material passes through the perforated screen at the discharge. Oversize retained for further cutting.
Overload Reverse & Eject (Automatic). If torque exceeds the PLC threshold, rotor automatically reverses to eject the unshreddable object, pauses, then resumes forward rotation.
The primary difference lies in the main shaft construction and material. The CX Series uses a fully forged solid 42CrMo alloy steel rotor (Φ275–350 mm), while the XB-L Series employs a lighter welded hollow shaft design suitable only for soft plastics and films. The CX forged rotor eliminates weld seams — the primary fatigue failure initiation points under cyclic high-impact loads common in metal and rigid plastic shredding. Combined with CNC single-setup precision machining that ensures knife mounting surface concentricity within microns, the CX rotor distributes impact energy uniformly and resists bending deflection. This design translates directly to a service life measured in decades for hard-material applications, compared to welded hollow shafts that develop micro-cracks and structural fatigue within a few years under the same loading conditions.
A forged solid shaft is metallurgically homogeneous — the grain flow of the 42CrMo steel is continuous throughout the cross-section, following the forging contours without interruption. Under repeated high-stress impact from hard materials, this homogeneous structure dissipates stress without internal nucleation sites. In contrast, a welded hollow shaft contains heat-affected zones (HAZ) around each weld seam, where the microstructure has been altered and residual stresses are locked in. Under cyclic loading, these HAZ regions become preferred sites for fatigue crack initiation. Once a crack initiates in a hollow shaft, it propagates rapidly through the thin wall section to catastrophic failure. The CX Series Φ275–350 mm solid cross-section provides a massive safety margin: even if surface wear occurs over decades, the bulk cross-section remains structurally intact.
The external guide mechanism positions the reciprocating guide blocks and linear bearing surfaces on the outside of the machine frame rather than buried inside the cutting chamber. This seemingly simple design decision has profound operational implications: all grease lubrication points are directly accessible without opening any access panels, removing any guarding, or stopping production. In conventional internal-guide designs, the guide blocks sit inside the chamber, submerged in the same debris-filled environment as the cutting zone. Lubrication requires a scheduled shutdown, partial disassembly, and confined-space access — a maintenance window that busy recycling plants routinely skip, leading to accelerated guide wear and eventual chamber misalignment. The CX external guide eliminates the excuse to skip lubrication and ensures the chamber reciprocation stays true for the life of the machine. For 24/7 recycling operations, this represents a direct reduction in unplanned downtime and maintenance labor.
A conventional open-top single shaft shredder hopper presents two persistent safety hazards: material ejection and operator access. During shredding, hard materials can be violently ejected upward by rotor kickback — a risk that increases with material hardness and irregular geometry. Simultaneously, the open top provides an unobstructed path for an operator to reach into the rotor zone while the machine is running. The CX Series addresses both: the pneumatic safety cover physically seals the hopper during operation, completely containing ejected debris within a reinforced steel enclosure. The cover actuation is interlocked with the PLC — the rotor cannot start until the cover is confirmed closed, and the cover cannot be opened while the rotor is spinning. This dual-barrier approach (physical barrier + control interlock) is aligned with modern machinery safety standards and provides a step-change in operator protection compared to legacy open-hopper designs.
Knife material selection balances wear resistance against impact toughness — a trade-off that depends on the dominant failure mode of your application. D2 tool steel (HRC 58–60) offers the highest wear resistance and is the default recommendation for shredding rigid plastics (PVC, ABS, PC) and wood, where the primary degradation mechanism is abrasive wear from continuous sliding contact. SKD-11 (HRC 58–60) provides similar wear properties with slightly better toughness and is widely used as the Japanese-standard equivalent of D2. H13 hot-work tool steel (HRC 58–62) sacrifices some wear resistance for substantially higher impact toughness and thermal fatigue resistance — critical when shredding metals (aluminum profiles, scrap copper, light steel) where the knives experience repeated high-energy impact rather than pure abrasion. For mixed-waste operations processing both metals and plastics, H13 knives provide the best overall durability. Chenxing can factory-install any of these alloys and recommends running a material-specific trial to optimize knife life and replacement cost.
Chenxing Machinery is a specialized manufacturer of plastic recycling and size reduction equipment based in Zhangjiagang, China. Our product range spans single shaft shredders, crushers, pulverizers, extruders, pelletizing lines, and complete recycling systems.
For size reduction specifically, the CX Series complements our SMF Series Disc Grinding Pulverizer for fine powder production and the SMP Series Knives Pulverizer for medium-fine grinding applications. Our NSPC Series Crushing and Grinding Machine provides an alternative for applications requiring a different cutting geometry.
For complete recycling systems, the CX Series integrates seamlessly with downstream equipment: the Conical Twin Screw Extruder or High-Output Single Screw Extruder for pelletizing shredded material, the Water Strand Pelletizing Line (SJ Series) and Water Ring Cutting Recycling and Granulating Line for end-to-end recycling, and profile extrusion lines including the PVC WPC Profile Extrusion Line, PPR/PPH High-Speed Pipe Production Line, and PVC WPC Celuka Foam Board Sheet Extrusion Line. Our auxiliary equipment line completes the offering.
Learn more about our company on the About Us page. Explore real-world installations in our Applications section. Stay updated through our Company News page. For inquiries, visit our Contact page.
Step 1: Share Your Requirements
Tell us your material type, desired output capacity (kg/h), and target particle size. Email: ceo@cxsljx.com
Step 2: Receive a Customized Proposal
Our engineering team evaluates your input and recommends the optimal CX model with knife material selection, screen aperture, and optional configurations.
Step 3: Confirm & Produce
After technical alignment, we manufacture your shredder to specification with lead-time confirmation and progress updates.
Step 4: Ship, Install & Support
We arrange international logistics, provide installation drawings and commissioning support, and offer lifetime after-sales technical service.
Contact Nicole: +86 15951187228
Company: Zhangjiagang Chenxing Machinery Co., Ltd.
Website: https://www.chenxingmachinery.com/
