Replacement Blades for Plastic Granulators
Keep your plastic granulator machine cutting cleanly and efficiently. We supply rotor and stator knives made from premium tool steels with precise grinding, stable hardness, and fast turnaround—customized to your dimensions and mounting pattern.
- SKD11, D2, DC53, and high-speed tool steel options for stable wear life.
- Custom length, width, thickness, and mounting hole patterns tailored to your machine.
- Ready stock for common standard sizes with fast turnaround on custom orders.
Built for Wear Parts Reality
Blade quality directly impacts throughput, fines, energy use, and downtime. These knives are engineered for repeatable cutting performance in demanding recycling environments.
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Stable Wear Life
Tool-steel selection and controlled vacuum heat treatment deliver consistent hardness (HRC 56–60) and toughness for longer edge retention.
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Precision Fit
Accurate thickness, flatness, hole alignment, and bevel angles help keep the cutting gap stable and reduce machine vibration.
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Cleaner Cuts, Fewer Fines
Sharper geometry and correct relief reduce dust and fines, improving downstream washing and pelletizing line performance.
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Fast Replacement Cycles
Common sizes ship quickly from stock; custom production is streamlined with drawings or samples to minimize downtime.
What We Supply: Rotor & Stator Knives
We supply complete replacement knife sets for granulators and crushers, matched to your feedstock and chamber geometry.
Matched Rotor & Bed Knife Sets
Consistent regrind size requires precise clearance between rotor knives and stationary bed knives. We manufacture matched sets with uniform grinding angles to maintain an even cutting gap across the entire rotor length.
Custom CNC Machining & Tolerances
From counterbored bolt holes and threaded inserts to specialized double-beveled shearing profiles, every knife is machined to tight tolerances for secure seat engagement and drop-in compatibility.
Tool Steel Options & Selection Guide
Selection depends on abrasiveness, contamination, impact load, and required edge life. Share your material and we’ll recommend the best fit.
| Steel Grade | Best For | Hardness Range | Performance Notes |
|---|---|---|---|
| SKD11 | General-purpose hard plastics & mixed regrind | HRC 56–58 | Excellent balance of toughness and wear resistance; a reliable workhorse choice. |
| D2 | Abrasive feeds & longer wear targets | HRC 58–60 | Higher wear resistance; recommended when contamination or mineral fillers increase abrasion. |
| DC53 | Heavy-shock & tough plastic scrap | HRC 60–62 | Superior toughness over D2; resists chipping under high-impact purgings and thick profiles. |
| W18 / HSS | Specific high-wear or elevated temperature feeds | HRC 62–64 | Offered for specialized continuous operations upon request; selection depends on process conditions. |
Custom materials (e.g., tungsten-carbide brazed inserts or specialized alloy coatings) can be evaluated based on your feedstock economics.
How to Order: Fast Quote Checklist
The more accurate the input, the better your fit and cutting performance. A drawing or sample is ideal.
Length × width × thickness, plus grinding tolerances if available.
Hole positions, center-to-center distances, countersinks, keyways, and orientation.
Primary bevel angle, relief angle, and single or double-sided cutting edges.
Plastic type, moisture, fillers, sand/metal contamination, and expected throughput.
Frequently Asked Questions
Key information about blade lifespan, steel selection, custom fit, and lead times.
Replace or regrind blades when you see rising fines, higher power draw, poor cut quality, overheating, or frequent jams. Many operators schedule inspection by running hours and material abrasiveness.
Yes. We manufacture rotor knives, bed knives (stator), and counter knives to your drawing or sample, including custom lengths, thicknesses, mounting holes, and bevel angles.
SKD11 is a balanced choice for toughness and wear life across many hard plastics. D2 offers higher wear resistance for more abrasive or contaminated feeds. We recommend based on your material, contamination, and throughput targets.
Send knife dimensions (L/W/T), hole pattern, bevel/relief angle, quantity, material being processed, and your machine model. A drawing or sample gives the fastest, most accurate quote.
Yes—common knife sizes are often available for quick shipment. For custom geometry or uncommon hole patterns, we manufacture to drawing or sample.
Yes. Matching bevel/relief angle and thickness is critical for cut quality. Provide your current knife spec (or send a sample) and we will replicate it.
We can recommend regrind intervals and sharpening geometry based on your material and throughput. Proper rotation and consistent gap settings usually extend service life.
Lead time depends on steel grade and quantity. Share your specification using the form below and we will reply with lead time and shipping options.
Quality Guarantee & Technical Support
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Material & Hardness Certification
Every batch undergoes rigorous Rockwell hardness testing and ultrasonic flaw detection. Material test reports (MTR) provided on request.
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Resharpening & Installation Guidance
We provide professional sharpening angle recommendations, blade gap adjustment tolerances, and torque specifications for mounting bolts.
Request Price & Lead Time
Send your knife dimensions (or upload drawing/sample details) and we’ll confirm the specification, steel option, and delivery schedule.
