Plastic Granulator & Pelletizing Knives Manufacturer

Name: Granulator & Pelletizing Knives
Brand: Huiheng Blades

Granulator & Pelletizing Knives — granulator knives, factory direct

Key features

Rotor and bed knives ground as matched sets to 0.02 mm gap
SKD-11 / DC53 for glass-filled and abrasive compounds
Carbide-inlaid edges for extreme wear stations
Claw, flat and V-shaped granulator blade profiles
Fast turnaround on repeat profiles once your drawing is on file

Specifications

Material	SKD-11, DC53, Cr12MoV, carbide inlay option
Hardness	HRC 58–64
Length	up to 1,200 mm
Thickness	8 – 40 mm
Edge	Straight, claw, V-profile; matched rotor/bed sets
Flatness	≤ 0.02 mm for gap-critical pairs
MOQ	1 set

Applications

Strand pelletizing

Rotor and bed knives for strand pelletizers.

Underwater pelletizing

Cutter-hub blades for underwater systems.

Film and bottle granulating

Claw and flat blades for granulators.

Hard plastic crushing

Crusher knives for lump and purge material.

Blade types we make in this line

A partial list — if you do not see your blade, send us the drawing or a photo and we will confirm.

Strand pelletizer rotor knivesPelletizer bed knivesUnderwater pelletizer knivesPineapple pelletizer knivesGranulator claw knivesGranulator flat bladesV-profile granulator bladesCarbide-inlaid granulator knives

Fitting your machine, and buying a replacement

Granulator and pelletizer knives for beside-the-press scrap granulators, strand pelletizers and underwater pelletizers, including machines in the Cumberland, Rapid, Conair and Herbold families. Bed knives and rotor knives are ground as a pair; order them together so the clearance is set once, not twice.

Also called: pelletizer knives · plastic granulator blades · granulator blade · strand pelletizer knives · bed knife · granulator knives replacement.

Materials used for this blade

Cr12MoV

HRC 58–62 · High

Widely used, well understood grade. Good balance of cost and life.

Read the full grade guide

SKD-11 (D2)

HRC 60–64 · Very high

Longer life than Cr12MoV at higher cost. The default upgrade.

Read the full grade guide

Frequently asked questions

Typically 0.05–0.15 mm depending on the resin. Too wide gives tails and dust; too tight and the knives kiss and chip. Our matched sets are ground flat to 0.02 mm so you can set the gap once and trust it.

Glass-filled compounds need carbide. Solid carbide is brittle for granulators, so we inlay carbide strips on a tough steel body — you get the wear life without the catastrophic cracking.

Yes. Send them in pairs if they are a matched set — we regrind them together and mark the new height so your gap setting stays right.

When regrinding no longer brings the edge back, or when the granulate starts showing fines and dust. Running a dull knife costs more in electricity and rejects than a new set does.

Almost always. The bed knife wears as the rotor knife wears. If you replace only the rotor knife, the gap is wrong from day one and the new edge is gone in a fraction of its normal life.