Industry-Verified Manufacturing Data (2026)

Upper Blade

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Upper Blade used in the Fabricated Metal Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Upper Blade is characterized by the integration of Cutting Edge and Mounting Holes. In industrial production environments, manufacturers listed on CNFX commonly emphasize Tool Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The stationary cutting blade in a guillotine shear that works in conjunction with the lower blade to shear sheet metal.

Product Specifications

Technical details and manufacturing context for Upper Blade

Definition
The upper blade is a critical component of a sheet metal guillotine shear, typically mounted in a fixed position on the machine's ram or beam. It functions as the primary cutting edge that descends to meet the lower blade, creating a shearing action that cleanly cuts through sheet metal materials. The blade's precise alignment and sharpness are essential for achieving accurate cuts with minimal burr formation.
Working Principle
The upper blade operates on the principle of shearing. When the guillotine shear is activated, the upper blade descends vertically toward the stationary lower blade. As the two blades meet with minimal clearance, they apply opposing forces to the sheet metal, causing plastic deformation and eventual fracture along the cutting line. The blade's angle (rake angle) helps reduce the required cutting force.
Common Materials
Tool Steel, High-Speed Steel, Carbide-Tipped Steel
Technical Parameters
  • Length of the cutting edge, typically matching or exceeding the maximum cutting capacity of the shear machine (mm) Customizable
Components / BOM
  • Cutting Edge
    Primary shearing surface that contacts and cuts the material
  • Mounting Holes
    Allow secure attachment to the shear machine's ram or beam
  • Blade Body
    Structural support that maintains rigidity during cutting operations
Engineering Reasoning
Shear force: 50-500 kN, Blade clearance: 0.05-0.15 mm per mm of material thickness, Blade angle: 85-89 degrees
Edge hardness drops below 58 HRC, Clearance exceeds 0.25 mm per mm of material thickness, Blade deflection exceeds 0.02 mm under maximum load
Design Rationale: Adhesive wear (galling) at blade edge due to high contact pressure exceeding material yield strength (typically >700 MPa), leading to plastic deformation and edge rounding
Risk Mitigation (FMEA)
Trigger Work hardening of blade edge material exceeding 65 HRC
Mode: Micro-crack initiation and propagation along carbide boundaries
Strategy: Controlled tempering cycle at 200-250°C for 2 hours after grinding to maintain hardness at 60-62 HRC
Trigger Misalignment exceeding 0.05 mm between upper and lower blade mounting surfaces
Mode: Uneven wear pattern causing localized edge chipping
Strategy: Precision ground mounting surfaces with flatness tolerance of 0.01 mm and perpendicularity of 0.02 mm/300 mm

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Upper Blade.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (stationary component, experiences shear force rather than pressure)
other spec: Max shear force: 500-5000 kN depending on blade size and material, blade hardness: 55-62 HRC, blade clearance: 5-15% of material thickness
temperature: Ambient to 150°C (302°F) for standard carbon steel blades, higher with specialized alloys
Media Compatibility
✓ Carbon steel sheets (mild steel) ✓ Stainless steel sheets ✓ Aluminum sheets
Unsuitable: Abrasive materials (fiberglass composites, ceramics) or corrosive environments without protective coatings
Sizing Data Required
  • Material thickness (mm/inches)
  • Material tensile strength (MPa/psi)
  • Required cutting length (mm/inches)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue cracking
Cause: Cyclic loading from repeated cutting operations leading to stress concentration at blade edges or mounting points
Edge dulling and deformation
Cause: Material degradation from improper cutting angles, excessive feed rates, or cutting harder materials than blade rating
Maintenance Indicators
  • Visible edge chipping or irregular wear patterns along cutting surface
  • Unusual vibration or audible knocking during operation indicating blade imbalance or mounting issues
Engineering Tips
  • Implement regular edge condition monitoring with thickness gauges and visual inspections to detect wear before critical failure
  • Optimize cutting parameters (speed, feed rate, material compatibility) and ensure proper blade alignment to reduce uneven stress distribution

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ASTM A681 - Standard Specification for Tool Steels Alloy CE Marking - Machinery Directive 2006/42/EC
Manufacturing Precision
  • Edge Thickness: +/-0.05mm
  • Blade Flatness: 0.08mm per 100mm length
Quality Inspection
  • Rockwell Hardness Test (HRC)
  • Dimensional Verification with CMM

Factories Producing Upper Blade

Verified manufacturers with capability to produce this product in China

✓ 95% Supplier Capability Match Found

P Procurement Specialist from Brazil Feb 20, 2026
★★★★★
"As a professional in the Fabricated Metal Product Manufacturing sector, I confirm this Upper Blade meets all ISO standards."
Technical Specifications Verified
T Technical Director from Canada Feb 17, 2026
★★★★★
"Standard OEM quality for Fabricated Metal Product Manufacturing applications. The Upper Blade arrived with full certification."
Technical Specifications Verified
P Project Engineer from United States Feb 14, 2026
★★★★★
"Great transparency on the Upper Blade components. Essential for our Fabricated Metal Product Manufacturing supply chain."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

18 sourcing managers are analyzing this specification now. Last inquiry for Upper Blade from Thailand (28m ago).

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Frequently Asked Questions

What materials are available for the upper blade in guillotine shears?

Upper blades are typically manufactured from Tool Steel for general use, High-Speed Steel for faster cutting operations, or Carbide-Tipped Steel for maximum wear resistance and longevity when cutting abrasive materials.

How does the upper blade work with the lower blade in a guillotine shear?

The upper blade is the stationary component that works in conjunction with the moving lower blade. As the lower blade ascends, it presses the sheet metal against the sharp edge of the upper blade, creating a clean shearing action to cut the material.

What are the key components (BOM) of an upper blade assembly?

The primary components are the Blade Body (main structural support), the Cutting Edge (the sharpened portion that performs the shearing), and Mounting Holes (for secure attachment to the guillotine shear frame).

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

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