Granulator Knife Holder

Name: Granulator Blade Mount Block for Recycling – Frigate
Price: 249.00 USD
Availability: InStock

Granulator Knife Holder ensures rigid blade positioning through ground bearing surfaces with flatness and parallelism maintained within ±10 microns. Precision seating eliminates axial displacement under dynamic shear loads, preventing variation in cut geometry and inconsistent granulate output.

Overall Dimensions

100–600 mm (L) × 30–100 mm (W) × 20–50 mm (H) (±0.1 mm)

Material Specification

D2 Tool Steel (58–62 HRC), 440C SS (55–58 HRC), or H13 (50–54 HRC for impact resistance)

Knife Mounting Interface

M6–M12 Bolt Holes (±0.02 mm), T-Slots (6–12 mm wide, ±0.05 mm), or Clamp-Type

Knife Angle/Geometry

30°–45° Cutting Angle (±0.5°), Relief Angle – 5°–10° (±0.2°)

Hardness (HRC)

55–62 HRC (Blade Seat Area), 45–50 HRC (Body for Shock Absorption)

Product Description

Granulator Knife Holder applies uniform compressive load across the full knife width using calibrated torque-balanced clamping mechanisms. Even pressure prevents blade distortion, ensuring consistent rake angle and extended edge integrity during cyclic operation.

Surface Finish

Blade Contact – Ra ≤0.4 µm, Non-Critical – Ra ≤1.6 µm, Threads – Ra ≤3.2 µm

Mounting Interface

Flange (ISO 9409-1), Shaft (DIN 5480), or Direct-Bolt (M10–M16, Class 10.9)

Flatness/Parallelism

≤0.02 mm/m (Seating Surface), ≤0.05 mm (Overall)

Concentricity/Alignment

≤0.03 mm TIR (Rotary Types), Blade Tip Runout – ≤0.1 mm (at Max RPM)

Certification Standard

ISO 9001, ASTM A681 (Tool Steel), DIN 17224 (Spring Steel for Clamps)

Technical Advantages

Granulator Knife Holder is manufactured from high-strength tool steels with high fracture toughness and treated to resist microstructural fatigue. Optimized for high-load impact zones, the holder maintains structural stability under repeated shear stress and thermal cycling.

Granulator Knife Holder incorporates a modular blade-locking system allowing rapid knife replacement with positional repeatability within ±0.02 mm. Indexing geometry eliminates the need for recalibration after each blade change, reducing downtime and setup complexity.

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Industry Applications

Plastic Reprocessing Plants

Granulator Knife Holder ensures precise cutting of post-consumer plastics into uniform flakes for extrusion-grade reprocessing.

Injection Molding Regrind Systems

Supports accurate downsizing of defective molded parts to consistent particle dimensions for reintegration into molding feedstock.

Blow Molding Scrap Recovery

Maintains fixed blade geometry for stable chopping of flash and trim waste from blow-molded containers.

Pharmaceutical Packaging Waste Granulation

Enables uniform shredding of multi-layer blister pack waste under low heat generation to prevent material cross-contamination.

Automotive Component Recycling

Provides controlled reduction of reinforced plastic components such as instrument panels and bumpers into reclaimable feed particles.

Film and Sheet Edge Trim Granulation

Facilitates continuous processing of polyethylene and polypropylene edge trims with constant cut quality under variable feed rates.

Rotor Interface Compatibility

Granulator Knife Holder is engineered for compatibility with slotted, dovetail, or bolted rotor interfaces. Custom holder-to-rotor mating surfaces ensure precise centerline alignment, avoiding radial offset errors that degrade cutting efficiency and increase bearing load.

Granulator Knife Holder uses thermally stable alloy compositions with low coefficient of expansion to maintain dimensional consistency during prolonged high-friction granulation. Thermal drift is minimized to preserve critical knife-to-knife spacing.

Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate ensure repeatable knife positioning in their Granulator Knife Holders?

Frigate machines every knife holder to tight tolerances using high-precision CNC grinding. Seating surfaces are controlled for flatness within ±10 microns to eliminate axial drift. Locating features like dowel pin holes and indexing slots ensure consistent knife alignment. This reduces setup time and maintains uniform cutting geometry across production cycles.

What makes Frigate’s Granulator Knife Holder suitable for abrasive polymer applications?

Frigate uses tool steels with high wear resistance, such as D2 or H13, for extended service life in abrasive environments. Optional surface treatments like nitriding or PVD coatings reduce edge wear and friction. The holder’s geometry supports full blade contact to minimize stress concentrations. These features improve performance during glass-filled or mineral-reinforced plastic cutting.

How does Frigate design their Granulator Knife Holder to minimize vibration during operation?

Frigate optimizes the holder’s mass distribution and stiffness using FEA simulations. Balanced clamping forces prevent asymmetrical loading, which is a common source of vibration. All contact surfaces are precision ground to maintain rigidity under impact. This ensures smoother cutting and protects rotor bearings from dynamic stress.

Can Frigate’s Granulator Knife Holder be integrated with non-standard rotor configurations?

Yes, Frigate provides customized holder designs based on rotor slot dimensions, mounting patterns, and axial clearances. The team can engineer holders compatible with legacy systems or unique OEM interfaces. Each holder is validated for rotor concentricity and knife clearance. This guarantees proper function without modification to the existing rotor.

How does Frigate address thermal distortion in their Granulator Knife Holder designs?

Frigate selects alloys with low thermal expansion and applies uniform heat treatment to avoid warping. Knife holders are tested under simulated thermal cycling to measure dimensional stability. Design features include stress-relieved geometry and optimized cross-section for heat dissipation. This prevents blade misalignment during continuous, high-load granulation.

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LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

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