HSS & D2 Tool Steel Drum Chipper Knives for Heavy Forestry, Biomass & Wood Recycling
Wood Chipper Blades
Heavy-duty drum chipper knives in M2 HSS, D2 (SKD11), and Cr12MoV tool steel for industrial forestry, whole-tree biomass processing & demolition wood recycling. Vacuum-hardened HRC 58–62 with deep cryogenic treatment. Precision surface-ground to ±0.05 mm thickness parallelism. Drop-in OEM fit for Vermeer, Morbark, Doppstadt, Jenz & Bruks Siwertell.
- ■Material: M2 HSS (1.3343) | D2 / SKD11 (1.2379) | Cr12MoV | 6CrW2Si
- ■Application: Industrial Drum & Disc Chippers, Whole-Tree Biomass, Demolition Wood, Pulpwood
■ ISO 9001:2015 Certified
■ In-House Heat Treatment
■ Strict Dimensional Tolerances
■ Global Door-to-Door Delivery
[ Engineering Reference ]
Decisive Specifications
| Material | M2 HSS (1.3343) | D2 / SKD11 (1.2379) | Cr12MoV | 6CrW2Si |
|---|---|
| Hardness | HRC 58–62 (D2/Cr12MoV) | HRC 62–64 (M2 HSS) | HRC 55–58 (6CrW2Si) |
| Heat Treatment | Vacuum Hardening, 4-Cycle Tempering + Deep Cryogenic (−196°C) |
| Thickness Tol. | ±0.05 mm (ensures drum dynamic balance at 2,500 RPM) |
| Bevel Angle | 25°–42° (optimised per species & contamination level) |
| Resharpening | Through-hardened — 8–12 regrind cycles per blade |
| Application | Industrial Drum & Disc Chippers, Whole-Tree Biomass, Demolition Wood, Pulpwood |
■ All values verified via CMM inspection · ISO 9001:2015
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Don't see your exact specs? Send us a blueprint, a worn sample, or just your machine model. Our team will review the details and provide a tailored quotation.
[ Standard Reference ]
Common Standard Dimensions
| Chipper OEM / Model | Length (mm) | Width (mm) | Thickness (mm) |
|---|---|---|---|
| Vermeer BC1800 / BC2100 | 310 | 100 | 19 |
| Morbark 40/36 Drum | 400 | 100 | 22 |
| Morbark 50/48 Disc | 250 | 120 | 25 |
| Peterson 5710 / 6710 Disc | 280 | 130 | 25 |
| Doppstadt DH 910 Biomass | 350 | 100 | 20 |
| Jenz HEM 820 | 380 | 110 | 22 |
| CBI Magnum Force | 450 | 120 | 25 |
| Heavy Whole-Tree / Custom | 600 | 150 | 30 |
[ OEM Compatibility ]
Compatible Machine Brands
® Registered trademarks are property of their respective owners. Sureay supplies compatible replacement blades — not OEM-branded parts.
[ Technical Audit ]
Engineering Advantages
HSS & D2 Tool Steel — Not Standard Carbon Steel
Standard high-carbon chipper knives dull within hours on dense hardwood and shatter on contaminated feedstock. Our D2/SKD11 blades deliver 2–3× longer edge life through uniform chromium-carbide distribution, while M2 HSS provides the ultimate edge retention on clean softwood at high-RPM drum speeds.
Deep Cryogenic + Through-Hardened Core
Vacuum hardening followed by deep cryogenic treatment at −196°C transforms retained austenite into stable martensite, boosting wear resistance by up to 40%. Through-hardening ensures each of the 8–12 regrind cycles delivers identical edge performance — no soft core exposed after sharpening.
±0.05 mm for Dynamic Drum Balance
At drum tip speeds above 60 m/s, a 0.10 mm blade thickness variation creates destructive centrifugal imbalance. Every blade is surface-ground to ±0.05 mm parallelism and verified before dispatch, ensuring the drum stays within OEM balance specification after installation.
[ System Inventory ]
Related Blade Categories
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[ Knowledge Base ]
Product FAQs & Buying Guidance
Technical FAQs
01When should I upgrade from standard high-carbon steel to D2 or M2 HSS chipper blades?+−
Upgrade to D2 (SKD11) when your chipper processes dense hardwood (oak, hickory, eucalyptus) or dry recycled timber on continuous 8+ hour shifts. D2's chromium-carbide matrix provides 2–3× longer edge life versus standard carbon steel. Upgrade to M2 HSS only for clean softwood at high drum RPM (1,500–2,500) where maximum edge retention is the priority — M2 at HRC 62–64 is more susceptible to impact damage on contaminated feedstock.
02How does blade thickness tolerance affect chip quality and drum vibration?+−
A ±0.10 mm deviation across blade sets produces both oversized and undersized chips that fail biomass screening specs (EN 17225-4). The same deviation creates centrifugal force imbalance at 1,500–2,500 RPM that accelerates bearing failure. Our ±0.05 mm tolerance eliminates both issues.
03How many times can industrial D2 chipper blades be resharpened?+−
Our through-hardened D2 blades can be reground 8–12 times before reaching minimum safe thickness (typically 60–70% of original). Regrind on a wet surface grinder using an aluminum oxide wheel (46–60 grit) at 0.02–0.05 mm depth per pass. Never dry-grind — localised overheating above 200°C draws the temper and softens the edge.
04Should I replace the counter-knife when I install new chipper blades?+−
The counter-knife should be inspected every time chipper blades are changed. A worn counter-knife reduces service life by 30–50% and degrades chip quality. Replace when visible edge rounding exceeds 1.0 mm or chipping exceeds 0.5 mm depth. We manufacture matched counter-knives in D2 and manganese steel as integrated sets.
Why Choose Sureay
01Are you a trading company or a direct manufacturer?+−
We are a 100% direct OEM manufacturer established in 2008. When you buy from Sureay, you bypass middleman markups and communicate directly with the engineers who forge and grind your blades.
02Can you supply blades for my specific chipper model?+−
Yes. Send us your existing blade sample, a technical drawing, or your chipper make and model number. We maintain an extensive database of OEM blueprints for Vermeer, Morbark, Doppstadt, Jenz, Peterson, CBI, and Bruks platforms. Custom dimensions within 10–15 working days.
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