Quality Cumberland Granulator Knives that Keep Your Production Running

Name: Get Quality Cumberland Granulator Knives
Brand: Cumberland Granulator Blades
Availability: InStock
Rating: 5 (1 reviews)

We manufacture premium Cumberland Granulator Knives and Blades for the plastics and rubber recycling industries. These blades are manufactured to exact OEM specifications using premium tool steels and advanced heat treatment processes to ensure superior cutting performance, extended blade life, and consistent particle size reduction.

Our Cumberland replacement blades are fully interchangeable with original equipment manufacturer (OEM) blades and are compatible with all major Cumberland granulator models, including the 200, 300, 400, 600, 800, and 1000 series.

Using only traceable steel, we manufacture all Granulator Knives and Blades in our ISO 9001-certified factory in Sheffield.

Benefits Choosing Our Cumberland Granulator Blades:

✓ ISO 9001 certified manufacturing
✓ Premium traceable steel materials
✓ Precision ground for a perfect fit

✓ Fast turnaround available
✓ Expert technical support
✓ Custom manufacturing capabilities

Longer Lasting Performance

Our Cumberland blades are manufactured from premium D2 tool steel and tungsten carbide materials, providing superior wear resistance that extends blade life and reduces your replacement costs.

Minimize Production Downtime

Precision-ground to exact specifications, our blades deliver consistent cutting performance throughout their service life, keeping your Cumberland granulator running efficiently with fewer interruptions.

Expert Manufacturing

Every blade is crafted by our highly skilled team using advanced grinding techniques. We never compromise on material quality, ensuring each blade meets the demanding requirements of industrial granulation.

Our Cumberland Blades Production

All Cumberland granulator blades are manufactured in our ISO 9001:2015 certified facility in Sheffield, UK, using advanced CNC grinding and heat treatment processes:

Material Selection and Inspection
Premium grade D2 tool steel or tungsten carbide sourced from certified suppliers with full material traceability and mill certificates.
Precision CNC Grinding
Computer-controlled grinding to achieve dimensional tolerances of ±0.02mm, ensuring a perfect fit and consistent cutting geometry.
Heat Treatment
Computer-controlled vacuum furnace heat treatment to achieve optimal hardness (58-62 HRC) with minimal distortion and maximum wear resistance.
Finish Grinding & Honing
Final precision grinding and honing to create razor-sharp cutting edges with surface finish better than Ra 0.4μm.
Quality Inspection
100% dimensional inspection using precision measuring equipment, hardness testing on every production batch, and visual inspection for surface defects.

Every batch of Cumberland granulator blades undergoes rigorous quality control testing:

Quality Control in our ISO 9001:2015 factory

Dimensional Accuracy

Hardness Testing

Surface Finish

Edge Sharpness

Material Tracebility

Dimensional Accuracy

Hardness Testing

Surface Finish

Edge Sharpness

Material Tracebility

Cumberland Knives Technical Specification

We manufacture blades for all Cumberland granulator models, including:

Rotor blades and stator blades
D2 tool steel blades for general applications
Tipped blades for abrasive materials
Custom configurations for specific requirements

This is what our customers say

Product quality

February 10, 2026

Good quality product and easy to work with

Andreas

We manufacture granulator blades for a range of Cumberland granulators

At Fernite we manufacture granulator knives in our ISO9001 certified factory from the highest quality steel. We manufacture popular and customised Cumberland granulator knives to dimensional tolerances that meet or exceed OEM specifications.

We maintain comprehensive technical drawings and manufacture replacement blades for these popular Cumberland models:

Don’t see your model listed? We can manufacture blades for other Cumberland machines from your original sample, drawing, photograph, or machine specifications.

If you need a blade for a different granulator, please check our Granulator Blades page.

Contact Nick to find out more.

Office: +44 (0) 114 244 0527 Ext: 129

Email: nick.wright@fernite.co.uk

Mobile: 07480 254837

WhatsApp: 07480 254837

Mon – Thu: 8.30am-5.00pm

Fri: 8.30am – 3.45pm

Sat-Sun: Closed

Frequently Asked Questions from our Customers

What are the signs that my Cumberland granulator blades need replacement?

Key warning signs include: increased amp readings, inconsistent particle size, excessive dust or fines, increased noise and vibration, visible edge wear or chipping, and higher operating temperatures. Non-uniform and dusty regrind, reduced throughput rates, noisy working environment, and increased energy consumption all indicate blade replacement is needed.

2 Are your replacement blades compatible with original Cumberland equipment?

Yes, our Cumberland replacement blades are manufactured to exact OEM specifications and are 100% compatible with original Cumberland granulator equipment. We reverse-engineer blades to match or exceed OEM quality, ensuring proper fit, performance, and interchangeability across all Cumberland models from 200 to 1000 series.

What's the difference between D2 tool steel and tipped Cumberland blades?

D2 tool steel (58-62 HRC) offers excellent value for general plastic processing with 200-400 hour blade life. Carbide-tipped blades cost more initially but last 3-5 times longer (600-2000 hours) when processing abrasive materials like glass-filled plastics, contaminated regrind, or engineering polymers. Choose based on your material type and production volume.

Which Cumberland blade material is best for glass-filled plastics?

For glass-filled plastics (especially >15% glass content), we recommend tipped Cumberland granulator blades. D2 steel hardened up to 59HRC Rockwell is commonly used, but may be too soft for highly abrasive materials. Carbide tips provide superior wear resistance and significantly longer blade life for these challenging applications.

Can you supply Cumberland bed knives and rotor blades separately?

Yes, we manufacture both Cumberland bed knives (stationary knives) and rotor blades (rotating knives) separately or as complete sets. Rotor blades typically wear faster and may need more frequent replacement. We can supply individual blades or full sets based on your maintenance schedule and budget.

As an expert granulator blade manufacturer, we can develop bespoke products for all applications.