Custom Metal Shear Blades & OEM Replacement Shearing Knives (Manufactured As Per Drawing)

1. Technical Classifications & Reverse Engineering

We manufacture custom metal shear blades and OEM replacement shearing knives engineered for hydraulic swing beam shears, variable rake guillotines, and mechanical shearing lines. Production runs are executed based on engineering drawings, blueprints, or physical samples via precise reverse engineering.

Our facility supplies drop-in replacements compatible with sheet metal machinery from Amada, LVD, Accurpress, and Komatsu, as well as non-standard industrial setups. All configurations undergo 100% blueprint parameter verification before machining.

2. Material Specifications & Metallurgical Treatment

Blades undergo computer-controlled vacuum furnace quenching and multi-stage nitrogen tempering to balance matrix toughness and abrasive wear resistance. Raw material selections conform to global chemical and physical performance standards:

• D2 / DC53 (58–62 HRC) — High-Carbon, High-Chromium Cold-Work Steel

  • Chemical Composition (Nominal %): D2: C 1.50, Cr 12.00, Mo 0.80, V 0.90 | DC53: C 1.00, Cr 8.00, Mo 2.00, V 0.30.

  • Physical & Mechanical Properties: High compressive strength, dimensional stability under compressive stress, and high abrasive wear resistance.

  • Application: Engineered for high-load, continuous automated shearing of abrasive or high-tensile sheet metal.

• Cr12MoV / SKD11 (56–60 HRC) — Cold-Work Die Steel

  • Chemical Composition (Nominal %): C 1.45–1.70, Cr 11.50–12.50, Mo 0.40–0.60, V 0.15–0.30.

  • Physical & Chemical Properties: High hardenability, micro-structure contains uniform chromium carbides to resist adhesive wear and minimize edge friction.

  • Application: Developed to prevent edge build-up and zinc galling when processing galvanized sheet steel, PPGI, and standard carbon steels.

• LD (7Cr7Mo2V2Si) (58–62 HRC) — High-Toughness Sheet Metal Alloys

  • Chemical Composition (Nominal %): C 0.75, Cr 7.00, Mo 2.00, V 2.00.

  • Physical & Mechanical Properties: Delivers structural impact toughness combined with bending strength to resist edge chipping under heavy industrial loads.

  • Application: Specified for high-strength steel cutting, stainless steel processing, and heavy-duty sheet metal blanks where edge micro-chipping is a risk.

• 9CrSi (57–61 HRC) — Low-Alloy Tool Steel

  • Chemical Composition (Nominal %): C 0.85–0.95, Cr 0.95–1.25, Si 1.20–1.60.

  • Physical Properties: Stable cutting-edge performance and structural hardness under standard, low-frequency friction workloads.

  • Application: Restricted to light-duty utility cutting, manual tools, or intermittent shearing lines. Not intended for high-frequency continuous automated production.

3. Machined Tolerances & Quality Control Framework

Finishing is performed on temperature-stabilized CNC grinding machines. Straightness and parallelism deviations are verified within ≤ 0.02 mm/m. Thickness tolerances are held to ±0.02 mm to provide a reliable, co-planar assembly baseline for paired upper and lower tooling seats.

Our workshop implements rigorous internal quality control workflows to verify material compliance and dimensional accuracy prior to shipment:

• Material Grades: All raw tool steel stocks are verified to comply with ASTM A681 and DIN EN ISO 4957 chemical composition metrics.

• Process Control: Internal production and machining phases are managed under structured quality protocols aligned with global industrial manufacturing guidelines.

• Certification: An EN 10204 3.1 Inspection Certificate (MTC) accompanies each delivery, detailing actual heat-lot chemical analysis and ladle composition.

Hardness Verification: 100% of production batches undergo surface and core hardness testing compliant with ISO 6508-1 (Rockwell C) to ensure the target 56–62 HRC profile.

4.Steel Grade Correspondence & International Standard Equivalents

Raw material selections are verified against international metallurgic standards to ensure chemical and mechanical alignment across cross-border equipment replacements and global blade replacement compatibility.

5. Technical Support FAQ (Bespoke Manufacturing & OEM Replacement)

Q1: What documentation is required for custom shear blade manufacturing?

A: We require technical CAD blueprints in DWG, DXF, PDF, or STP formats. Drawings must specify exact geometric dimensions, bolt hole center-to-center distances, countersunk profiles, tolerances, and target material cutting specifications.

Q2: Do you guarantee mechanical interchangeability with OEM machinery?

A: Yes. Mounting seat parallelism and straightness deviations are maintained within ≤ 0.02 mm per meter to match original equipment dimensions for seamless field installation on brands including Amada, LVD, and Accurpress.

Q3: Why is vacuum heat treatment specified for these knives?

A: Computer-controlled vacuum furnace quenching and multi-stage nitrogen tempering deliver a uniform through-hardness of 56–62 HRC (depending on steel grade selection). This precise thermal process eliminates structural soft spots and prevents microscopic cracking under heavy production loads.

Q4: Which tool steel grade should be selected for different metal cutting workloads?

A: Select D2 or DC53 for abrasive stainless steel and high-tensile PPGI lines. Use Cr12MoV or SKD11 to minimize cold-welding and zinc galling on galvanized sheets. Specify H13 or LD alloys for heavy-gauge plate cutting and impact-heavy shearing applications.

Q5: What are the dimensional tolerances for a matched set of shear blades?

A: Individual upper and lower blade thickness tolerances are strictly held to ±0.02 mm. This high dimensional consistency ensures a parallel, co-planar assembly baseline across the entire tool seat, minimizing lateral blade deflection.

Q6: What are the engineering limits for regrinding worn shear blades?

A: Cumulative thickness reduction must not exceed 10% of the original blueprint size, and width wear must remain within 15%. To maintain operator safety and cutting alignment, all blades require complete professional demagnetization post-grinding.

Q7: What quantitative quality control standards apply to each finished batch?

A: Every delivery is accompanied by an EN 10204 3.1 Material Test Certificate (MTC). Inspection criteria require a 5-point surface hardness variance of ≤ ±0.7 HRC and a precision-ground surface finish of Ra ≤ 0.8 μm.