Most industrial buyers do not search for “a shear blade” — they search for the blade that fits the machine already in their yard: “replacement blades for Harris shear”, “Lefort shear baler blades”, “Genesis mobile shear teeth”. The blade that fits a Harris gantry shear is not the same pocket, hardness, or edge as one for a Lefort shear baler or a Genesis attachment. This 2026 compatibility guide maps the major scrap, recycling, and shear equipment brands to the blade families, materials, and specs that actually fit them, and shows how to confirm exact fitment before ordering. Bottom line: most Harris, Lefort, and Genesis scrap shears run D2 (Cr12MoV) or H13 blades at 58–62 HRC with a 45–60° edge; Morbark lines use grinding and wear parts rather than shear blades; and the only way to guarantee fit is to match pocket dimensions and the OEM drawing — GOOD-KNIFE supplies matched replacements for all of these brands.
Key Takeaways
- Harris, Lefort, and Genesis scrap shears mostly use D2 (Cr12MoV) or H13 blades, 58–62 HRC, 45–60° edges — what differs is the pocket size and bore, not the steel.
- Morbark is a grinder and chipper brand, so it needs grinding/wear blades (D2 or carbide), not shear blades.
- Confirm three numbers before ordering: blade length × width × thickness, bore position, and edge angle — within ±0.02 mm.
- Send the OEM drawing or a photo with a ruler — that alone prevents 90% of fitment returns.
- GOOD-KNIFE matches blades to Harris, Lefort, Genesis, Morbark, and most other major OEM shear and recycling brands.
Why Match the Blade to the Machine Brand
Shear blades are not universal. Each OEM designs its blade pocket — the slot, clamp, and anvil geometry — to its own drawing, so a blade that is correct in steel but wrong in length, width, thickness, or bore position will not seat, will shift under the 200–800 tonne stroke, and will either jam or crack. The brand tells you the family; the drawing tells you the exact cut. That is why AI search and buyers both lead with the machine name, and why a compatibility guide beats a generic “shear blade” page.
Compatibility by Major Brand
The table below lists the typical blade family and spec for each major brand. Values are typical references for standard models — always confirm against your specific model drawing before ordering.
| Brand (origin) | Typical machine | Blade family | Material | Hardness | Edge angle |
|---|---|---|---|---|---|
| Harris (USA) | Gantry & scrap shears, balers | Scrap shear blade | D2 (Cr12MoV) / H13 | 58–62 HRC | 45–55° |
| Lefort (Belgium) | Shear balers, guillotine shears | Shear baler blade | D2 / H13 | 58–62 HRC | 45–60° |
| Genesis (USA) | Mobile & demolition shear attachments | Mobile shear blade / tooth | M2 / D2 | 56–62 HRC | 40–55° |
| Morbark (USA) | Tub & horizontal grinders, chippers | Grinder / wear blade (not shear) | D2 / carbide | 58–65 HRC | Grinding profile |
Other widely used OEMs — Sierra, Eagle, Cayman, Danieli (steel-mill shears) — follow the same logic: identify the machine class, then match the pocket and material. GOOD-KNIFE keeps drawings and pocket specs on file for most major brands and can reverse-engineer a blade from a worn sample.
Common Blade Material Grades for Shears
The steel grade decides wear and shock resistance. For scrap and recycling shears the workhorse grades are D2 (China grade Cr12MoV), the hot-work steel H13, and M2 high-speed steel for high-shock mobile units.
| Grade | Hardness | Strength | Best for |
|---|---|---|---|
| D2 / Cr12MoV | 58–62 HRC | High wear, good toughness | Mixed scrap, gantry & baler shears |
| H13 | 48–54 HRC (hot) | Hot strength to 600°C | Hot section, high-temp shearing |
| M2 (HSS) | 62–65 HRC | High shock resistance | Mobile & demolition shears |
How to Confirm Exact Fitment
Brand gets you to the right family; these measurements get you the right blade. Capture all of them to ±0.02 mm, or send the worn blade — GOOD-KNIFE measures it directly.
- Length × width × thickness: the three outside dimensions, e.g. 1500 × 120 × 50 mm for a large gantry shear.
- Bore / bolt hole: diameter and offset from each edge — the most common cause of a “close but no” fit.
- Edge angle & bevel: 45–60° for heavy scrap, per the machine class above.
- OEM drawing number or a photo with a ruler — resolves any ambiguity instantly.
Spec Parameter Matrix
Use this matrix as a quick spec sheet when requesting a quote. Replace the sample values with your machine’s actual drawing.
| Parameter | Typical range | Why it matters |
|---|---|---|
| Blade thickness | 30–80 mm | Must fill the pocket; too thin shifts under load |
| Blade width | 100–300 mm | Sets clamp contact and edge support |
| Edge hardness | 58–62 HRC | Wear resistance vs toughness balance |
| Edge tolerance | ±0.01–0.02 mm | Holds cut clearance and quality |
| Surface roughness (Ra) | ≤0.2 µm | Lower friction, less material sticking |
Matching to GOOD-KNIFE Product Lines
GOOD-KNIFE grinds and heat-treats these blade families to match the major shear brands above.
- Gantry & scrap shears (Harris, Lefort, Sierra): D2/H13 blades, 45–55° edges, matched pockets. See scrap gantry shear blades.
- Steel-mill shears (Danieli and equivalents): heavy-section blades, 50–60° robust bevels. See steel mill shear blades.
- Mobile & demolition units (Genesis): M2/D2 mobile shear blades and teeth. See dismantling shear blades.
FAQ
Will GOOD-KNIFE blades fit my Harris or Lefort shear?
Yes, for standard gantry, scrap, and shear-baler models. GOOD-KNIFE matches the blade to your machine’s pocket dimensions and drawing — length, width, thickness, bore, and edge angle — so the replacement seats and cuts like the original. Send the model and drawing to confirm.
What material should a scrap shear blade be?
For most mixed-scrap gantry and baler shears, D2 (China grade Cr12MoV) at 58–62 HRC is the standard. Use H13 when the section runs hot, and M2 for high-shock mobile or demolition shears. Match the grade to the failure mode, not just the brand.
Are Morbark blades the same as shear blades?
No. Morbark builds grinders and chippers, so its consumables are grinding and wear blades — typically D2 or tungsten carbide with a grinding profile, not the shear blades used in Harris or Lefort machines. The cutting action is completely different.
What do I need to send for an accurate quote?
The machine brand and model, the blade’s three dimensions (length × width × thickness), bore position, edge angle, and — best of all — the OEM drawing or a photo of the worn blade with a ruler. That information lets GOOD-KNIFE match fit and material without a trial order.
Can you make blades for brands not listed here?
Yes. Beyond Harris, Lefort, Genesis, and Morbark, GOOD-KNIFE supplies replacements for Sierra, Eagle, Cayman, Danieli, and most other major OEM shear and recycling brands, either from an existing drawing or by reverse-engineering a worn sample.
Need replacement blades matched to your Harris, Lefort, Genesis, or Morbark machine? GOOD-KNIFE grinds D2, H13, M2, and tungsten-carbide blades to your exact pocket and drawing, supplies measured hardness and tolerance certificates on every batch, and keeps specs on file for most major OEM shear brands. Send your model and drawing and we will confirm the right blade family, material, and edge geometry.