Granulator Blades for Efficient Size Reduction
Granulator blades are essential cutting components used in plastic granulators, crushers and recycling equipment to reduce materials into consistent particle sizes for further processing. We supply industrial granulator knives for applications including plastic recycling, PET processing, cable recycling and rubber size reduction.
During operation, rotor and stationary knives work together under continuous high-speed cutting loads. The right combination of blade material, hardness, edge geometry and manufacturing precision directly influences cutting efficiency, energy consumption and service life.
Working with specialized manufacturing partners, we supply high-quality standard and custom granulator blades according to machine model, technical drawing, physical sample or verified dimensions.
Our goal is to provide reliable cutting performance, consistent quality and dependable replacement solutions that help keep your equipment running efficiently.
Key specifications
| Name | Granulator Blades |
|---|---|
| Blade Type | Rotor knives, stationary knives, cutter blocks, custom knife designs |
| Size: | Customized according to drawings |
| Package | Wooden box with anti-rust film inside |
| Knife Material Option | 9CrSi · SKD11 · D2 · DC53 · 1.2379 · 1.2344 · HSS · Tungsten Carbide Inlay |
| Hardness | 54–62 HRC, depending on material and application |
| Application | Plastic recycling, cable recycling, rubber processing, size reduction |
| Supply Type | Factory-direct supply and custom manufacturing |
Material selection
D2 and 1.2379 cover most plastics work and hold an edge well. DC53 is the better choice where the knife is long and thin and warping during heat treatment is a risk. High-speed steel goes in where the feed is clean and edge retention is everything — fibre, film, PET bottle flake — and tungsten carbide where the material is filled with glass or mineral and nothing else survives.
Filled and reinforced plastics are the usual reason a knife life estimate turns out wrong. Thirty percent glass fibre will destroy a standard tool steel edge in a fraction of the expected hours, and the answer is a change of grade, not a change of supplier.
Compatible brands
We manufacture replacement knives for the common granulator and crusher platforms, working from drawings, a sample knife, the part number or measured dimensions.
- AMIS
- Conair
- Cumberland
- Dreher
- Erema
- Getecha
- Herbold
- Hellweg
- Moditec
- Nelmor
- Pallmann
- Piovan
- Rapid
- Tria
- Vecoplan
- Virtus
- Weima
- Wittmann
- Zerma
- Zeno
Brand names are used to identify the machines our replacement parts fit. We are not affiliated with these manufacturers.
OEM and custom manufacturing
Rotor, bed and side knives can be produced from approved drawings, samples, part numbers, machine models or measured dimensions. Grade, hardness, edge angle, hole and slot position, thickness, flatness tolerance, marking and packing are specified per application.
For machine builders and distributors we take on OEM and private-label production with agreed inspection criteria, so repeat batches match the first one.
Applications
- Film and fibre
PE film, PP woven, nonwovens, tape and fibre waste where a clean scissor cut matters. - PET and bottle flake
Bottles, preforms and washed flake lines. - Rigid plastics
Pipe, profile, sheet, thick-wall mouldings and purge. - Sprue and production scrap
Inline granulation beside injection and blow moulding machines. - Filled and reinforced plastics
Glass-filled and mineral-filled compounds needing HSS or carbide. - Cable and e-waste
Granulation stages in cable and electronics separation lines.
Get a quote for granulator blades
Send the granulator model and the knife dimensions — length, width, thickness and hole pattern — or a photo of the knife with a tape measure across it. We quote new knives and regrinding side by side.
Get a free quote now
