Plastic feedstock
Discuss ABS, PE, PP, bottles, film, sheets, pipes or production scrap together with feed size and contamination. The blade material is selected separately.
Plastic Recycling Replacement Knives
Plastic Crusher Blades for Recycling Machines
Replacement moving and fixed blades for plastic crusher and granulator machines. Reference material includes 250, 300, 400, 500 and 650 model configurations, plus common blade-size and hole-spacing references. Final fitment is reviewed from your machine, drawing or worn blade.
Moving and fixed blade optionsReference hole patternsCustom fitment review
The page focuses on plastic-crusher applications. Final dimensions, material, hardness and cutting clearance are confirmed against the approved reference before production.
Send Your Blade Details
Built around the complete cutting relationship
A plastic crusher blade is a steel cutting component used inside a machine that reduces plastic feedstock. It is not a blade made from plastic. Moving knives, fixed knives, mounting seats and cutting clearances work together inside the machine.
ApplicationPlastic crushing and recycling
Reference formats250–650 model configurations + common sizes
Blade rolesMoving knives and fixed knives
Supply routeReference sizes or custom fitment
Moving or fixed
Confirm whether the part is a rotor knife, fixed knife or a complete matched set before comparing dimensions.
Mounting and clearance
Hole pattern, seat, cutting direction, thickness and rotor-to-fixed-knife clearance determine the practical fit.
Applications for plastic crusher blades
Start with the material form and working condition, then confirm the machine, blade position and mounting details before choosing a replacement.
Pipes, profiles and sheets
For rigid plastic pipes, profiles and sheets where feed size, thickness and cutting clearance must be checked together.
Crates, containers and housings
For rejected molded parts, crates and hard plastic housings that need a suitable moving and fixed knife arrangement.
Film and woven bags
For film, woven sacks and flexible plastic feedstock where feeding behavior, wrapping risk and rotor geometry matter.
PET bottles and hollow containers
For empty plastic bottles and containers prepared for size reduction; confirm the machine opening and feed arrangement first.
Production offcuts and rejects
For injection-molding runners, extrusion trim and production rejects where the actual piece size controls the blade review.
Post-industrial plastic components
For sorted mixed hard-plastic pieces and recycling feedstock; remove metal contamination and confirm the working duty before quotation.
Choose the blade role before comparing dimensions
Plastic crusher blades are selected by the job they perform inside the machine—not by the word “plastic” alone.
Rotor knives
Mounted on the rotor and working through the cutting chamber. Confirm the rotor position, quantity, length, width, thickness, hole pattern and cutting direction.
Bed or counter knives
Stationary knives that work with the rotor knives. Confirm the seat, hole spacing, edge position and rotor-to-fixed-knife clearance.
Moving and fixed blades together
When both sides are replaced, review the pieces together so the profile, effective height and working gap remain compatible.
This page covers plastic crusher and granulator knife configurations for plastic size reduction. If your equipment uses a different low-speed shredder or shaft system, send a machine photo before choosing the blade family.
Reference configurations and common size formats
The HTML table below shows paired blade configurations for 250–650 model references. The common-size table below is a separate size and hole-spacing format. These are reference formats, not a universal cross-reference table. Dimensions and hole spacing must be confirmed against the machine or old blade.
| Model / configuration | Reference blade 1 | Holes 1 | Spacing 1 | Reference blade 2 | Holes 2 | Spacing 2 |
|---|---|---|---|---|---|---|
| 250 — 2 fixed + 3 moving | 245 × 55 | 3 | 100 | 240 × 55 | 3 | 100 |
| 300 — 2 fixed + 3 moving | 295 × 55 | 4 | 68 | 290 × 55 | 4 | 68 |
| 300 — 2 fixed + 3 moving | 295 × 60 | 4 | 80 | 290 × 60 | 4 | 80 |
| 400 — 2 fixed + 3 moving | 395 × 80 | 4 | 90 | 390 × 80 | 4 | 90 |
| 500 — 2 fixed + 3 moving | 495 × 80 | 5 | 100 | 490 × 80 | 5 | 100 |
| 500 — 2 fixed + 6 moving | 495 × 80 | 5 | 100 | 248 × 80 | 3 | 75 |
| 500 — 2 fixed + 6 moving | 495 × 80 | 4 | 120 | 245 × 80 | 2 | 120 |
| 650 — 4 fixed + 6 moving | 324 × 80 | 5 | 65 | 324 × 80 | 5 | 65 |
The HTML table above covers model configurations. The common-size table below is a separate size and hole-spacing reference. Do not combine rows without confirming thickness, hole diameter, hole layout, mounting seat, cutting direction and effective clearance against the machine or old blade.
Common plastic crusher blade sizes
Reference sizes are grouped by hole count. Hole spacing is shown as the listed centre-to-centre value or range in millimetres.
| Hole count | Size (length × width × thickness, mm) | Hole spacing (mm) |
|---|---|---|
| 2 holes | 90 × 60 × 8 | 50 |
| 2 holes | 90 × 70 × 8 | 40 / 45 / 50 |
| 2 holes | 100 × 70 × 8 | 45 / 50 |
| 2 holes | 120 × 70 × 8 | 60 |
| 3 holes | 126 × 60 × 8 | 40 |
| 3 holes | 126 × 70 × 8 | 40 |
| 3 holes | 130 × 70 × 6 | 40 |
| 3 holes | 140 × 60 × 8 | 40 |
| 3 holes | 140 × 70 × 8 | 40 |
| 3 holes | 150 × 70 × 8 | 50 / 55 |
| 3 holes | 160 × 70 × 8 | 45 |
| 3 holes | 170 × 70 × 8 | 45 |
| 3 holes | 180 × 70 × 8 | 60 |
| 4 holes | 170 × 70 × 6 | 40 |
| 4 holes | 200 × 70 × 6 | 50 |
These sizes are reference formats, not a universal fitment standard. Confirm the machine seat, hole diameter, hole layout and cutting clearance before production.
Material and hardness reference
The available product information gives several material references. The final grade and treatment must be tied to the selected configuration and working duty.
65Mn · 9CrSi · SK5 · T10
These grades are reference options for review. They should not be treated as one interchangeable material family.
HRC 52–55
This range is shown as a product reference. Confirm whether it applies to the selected grade, construction and order.
Confirm before quotation
Any special edge, insert or construction requirement should be recorded on the approved drawing or written quotation.
Confirm the machine before choosing the blade
A visual match is only a starting point. Use the following checklist for a reliable fitment review.
01
Machine model
Brand, model, cutting-chamber arrangement and rotor information.
02
Blade position
Moving knife, fixed knife or complete replacement set.
03
Dimensions
Length, width, thickness and effective cutting height.
04
Mounting
Hole or slot count, diameter, spacing and layout.
05
Working duty
Plastic type, feed size, fillers, moisture and contamination.
06
Order scope
Quantity, matched components, destination and timing.
Product forms and technical references
These visuals help explain blade form, model examples and fitment information. They do not replace a drawing or machine check.
PC300 / FITMENT DRAWING
PC300 machine-fit reference
Reference configuration: 2 fixed knives + 9 moving knives. The supplied drawing shows a 298 mm knife length, 80 mm profile height, 17 mm thickness and 80 mm slot pitch.
PC400 / FITMENT DRAWING
PC400 machine-fit reference
Reference configuration: 2 fixed knives + 12 moving knives. The supplied drawing shows a 398 mm knife length, 80 mm profile height, 17 mm thickness and 80 mm slot pitch.
PC500 / FITMENT DRAWING
PC500 machine-fit reference
Reference configuration: 2 fixed knives + 15 moving knives. The supplied drawing shows a 498 mm overall reference, 400 mm internal length, 85 mm profile height, 17 mm thickness and 80 mm slot pitch.
PC600 / FITMENT DRAWING
PC600 machine-fit reference
Reference configuration: 4 fixed knives + 18 moving knives. The supplied drawing shows a 298 mm reference dimension, 80 mm profile height, 17 mm thickness and 80 mm slot pitch.
The four model drawings are separate visual references with equal-sized cards. Their dimensions and knife counts must still be checked against the machine, old blade or approved drawing before production.
Real-product photographs show product examples. Labels such as “in stock” and moving/fixed counts are not universal stock, quantity or delivery commitments.
Typical manufacturing process
Eight visual cards explain a typical route from material selection to protective packing. Each card keeps the image above the English description, with arrows connecting the sequence.
Material Selection
Select the steel grade according to the approved drawing, plastic duty and required balance of impact resistance and wear resistance.
Blank Cutting
Cut selected stock into blade blanks with machining allowance for the confirmed finished dimensions.
Rough Machining
Establish the blade profile and required mounting holes or slots before finishing operations.
Heat Treatment
Treat the machined blade according to the selected material and approved cutting-duty requirement.
Tempering and Stabilization
Apply the specified tempering and controlled cooling cycle before precision finishing.
Precision Grinding
Grind the faces and edges to the specified thickness, flatness and cutting geometry.
Inspection
Check the finished blade against the approved drawing or sample, including dimensions and hole pattern.
Protective Packing and Dispatch
Protect inspected blades with suitable wrapping and packing before dispatch.
Typical workflow for reference only. Confirm the actual process and inspection scope with the quotation.
When should a plastic crusher blade be replaced?
Use the operating symptoms as a prompt for inspection. The correct replacement decision depends on the machine, feedstock and approved blade reference.
Edge wear and rougher output
A rounded or damaged edge can change cutting quality. Check the edge geometry, effective height and required output size.
Chipping or cracking
Inspect corners, hole areas and the full cutting edge. Also check shock load, hard contamination, material selection and hardness.
Hole or seat damage
Elongated holes, burrs, damaged countersinks or seat wear can affect clamping, alignment and the working position.
Unstable clearance
Vibration, noise or uneven cutting can come from the rotor-to-fixed-knife gap, mounting condition or an incorrect replacement profile.
What to confirm before dispatch
Use this checklist before approving production and protective packing.
Dimensions and thickness
Match the approved drawing or sample and record the finished length, width, thickness and effective cutting height.
Hole pattern and spacing
Confirm hole or slot count, diameter, centre spacing, countersink details and mounting orientation.
Knife role and quantity
Record whether the order is for moving knives, fixed knives or a matched set, together with the required quantity.
Edge and flatness
Review cutting geometry, effective edge height, flatness and the clearance needed in the machine.
Material and hardness
Record the selected steel reference and target hardness against the approved quotation or technical reference.
Packing and identification
Protect the cutting edge and identify the machine reference, blade role, quantity and approved drawing before dispatch.
From an old blade to a matched replacement
Keep the quotation tied to a clear technical reference from the beginning.
Send the reference
Share the machine model, blade position, old blade photo, drawing or measured dimensions.
Review fitment
Check geometry, hole layout, material, hardness requirement and working clearance.
Approve the quote
Record the approved dimensions, material, quantity and inspection requirements.
Produce to approval
Use the approved reference for production, inspection and protective packing.
Plastic crusher blade questions
Short answers for replacement and custom-supply buyers.
What does “plastic crusher blade” mean?
It is a steel cutting component used to reduce plastic feedstock inside a crusher or granulator. It is not a blade made from plastic.
Are these blades suitable for every plastic crusher?
No. The listed configurations are reference options. Confirm the machine model, blade position, mounting details, profile, hole layout and clearance before production.
Which reference formats are shown?
The page shows paired 250, 300, 400, 500 and 650 model configurations, plus a separate common-size and hole-spacing reference. These formats are not a universal cross-reference; confirm the actual machine fit before production.
Which materials and hardness are referenced?
The current references include 65Mn spring steel, 9CrSi, SK5 and T10. HRC 52–55 is shown as a reference range. Confirm the exact material and hardness for the selected configuration.
Why are there several 500-model combinations?
Different 500-model rows represent different moving/fixed-knife arrangements and hole layouts. They should not be treated as interchangeable without checking the machine and old blade.
Can you make a custom blade?
Yes, subject to a drawing, sample or complete fitment information. Send the machine model, blade position, dimensions, hole layout, material and quantity for review.
What information is needed for a quotation?
Provide the machine brand and model, old blade photos, dimensions, hole or slot details, material being processed, quantity and destination. A drawing or sample is preferred.
GET IN TOUCH
Need a matched plastic crusher blade?
Please prepare the information you already have. The inquiry form is on our Connect Us page.
Helpful information to send
- Machine model or product type
- Key dimensions or mounting details
- Material or application and quantity
- Photo, drawing or old-part image if available