Durable block knives for efficient material reduction

reliable cutting performance for recycling plants

MetavCUT replacement blades for knives and block knives deliver robust, industry-grade cutting performance tailored to recycling and shredding applications. The range covers general-purpose cutting blades as well as specialised block knives (also referred to as shredder knives or block cutter blades) and concave hollow-ground knives for material-specific demands.

where and how these knives are used in practice

Knives and block knives serve as primary cutting elements in zerkleinerungsanlagen and other recycling systems. Block knives reduce bulk material into manageable fractions, while hollow-ground knives (concave profile) improve bite and material flow. Selection depends on input contamination, hardness and desired throughput: very highly hardened chrome-vanadium steel variants extend service life but are best for relatively contaminant-free feedstock; lower-hardened steels sacrifice some stand time but resist fracture from foreign bodies.

tangible benefits for daily production

• Increased throughput through optimised blade geometries and matching knife variants.
• Extended stand time when using very highly hardened chrome-vanadium steel block knives.
• Reduced unplanned downtime thanks to impact-resistant lower-hardened options for contaminated input.
• Versatile compatibility: options for scraping, broaching and free-cutting operations.
• Clear spare-part sourcing via a single supplier, simplifying maintenance planning.

why MetavCUT is the practical choice for workshops and plants

MetavCUT products are developed as tailored, durable and economical spare parts. Metav acts as a precision partner that combines decades of sector expertise with a comprehensive offering for industry and trade. From Emmerich, Metav supplies a quality-filtered assortment to Europe: over 48,000 customers, a catalogue exceeding 250,000 products, and dependable order handling from a central logistics hub. This makes MetavCUT a pragmatic choice for procurement officers seeking reliable knives and block knives without the uncertainty of unverified aftermarket parts.

technical highlights

• variants: block knives, hollow-ground knives (concave), hack knives, scraper knives, broaching knives, free-cutting knives; scrap shears; alligator shears
• materials: very highly hardened chrome-vanadium steel; lower-hardened steels
• performance trade-offs: higher hardness → longer service life; increased fracture risk with contaminated feedstock; lower hardness → reduced stand time; improved impact resistance
• applications: shredding, cutting, scraping, broaching, recycling plant maintenance
• positioning: MetavCUT own-brand spare and wear parts (not original equipment manufacturer parts)

FAQ

What is the difference between knives and block knives?
Block knives are robust cutting elements designed to reduce bulk materials in shredders and are commonly called shredder knives or block cutter blades; general knives and cutting blades include hollow-ground and scraper profiles for more specialised tasks.

Which material is recommended for high-throughput recycling?
For high throughput with predominantly clean input, chrome-vanadium steel block knives provide extended stand time; MetavCUT offers these hardening options alongside lower-hardened alternatives for more contaminated feeds.

Can MetavCUT knives tolerate foreign bodies in the input material?
MetavCUT supplies lower-hardened knife variants designed to be less susceptible to fracture from foreign bodies, balancing durability with impact resistance.

How do hollow-ground knives differ in cutting behaviour?
Hollow-ground knives (concave profile) improve bite and material evacuation; they are suitable where the outer profile must be broader than the centre to enhance cutting efficiency.