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86-15852949220
Premium DC53 & D2 Steel Rectangular Notcher Blades and Coping Tools
Core Material & Process: Premium D2, DC53, H13 Tool Steel | CNC Profile Milling + Vacuum Heat Treatment + Precision Surface Grinding
Target Industry & Application: Heavy Structural Steel Fabrication | Universal Steelworkers — Direct Drop-In Compatibility with Geka, Sunrise, Piranha, and Edwards Hydraulic Systems
Figure: Premium DC53 / D2 rectangular notcher blade set for heavy-duty ironworker coping
Heavy-Duty Ironworker Rectangular Notcher Blades & Coping Tools deliver clean, precise three-sided slots in structural steel sections for connection detailing, lintel manufacturing, and architectural metal frame fabrication. Unlike simple two-sided corner notchers, rectangular notching (or coping) requires the tooling to pierce the inner flange web of steel channels, angles, and plates simultaneously across multiple axes. ALAS Industrial manufactures high-performance replacement blades engineered to withstand catastrophic side-thrust deflections and vertical shearing stress, ensuring uniform edge clearances for standard structural steels such as ASTM A36, S235JR, and S355JR without micro-chipping.
With 15 years of technical expertise as a specialized B2B tooling partner, our engineering team optimizes blade geometries to withstand continuous impact loading in heavy fabrication shops, significantly reducing machine downtime and part-rejection rates.
| Parameter | Standard Production Value | Custom Tooling Options (Via Wire-Cut EDM) |
|---|---|---|
| Material Grade | DC53 Cold Work Steel (default standard) | D2 Premium Steel, H13 High-Shock Impact Steel, Cr12MoV |
| Hardness Range | HRC 58–62 (Vacuum Gas Quenched) | HRC 50–56 (Tailored for heavy-duty shock resistance in H13 tooling runs) |
| Single-Grind Lifespan | 8,000–12,000 strokes (ASTM A36 Mild Steel) | Variable based on specific stainless grade properties |
| Total Resharpening Limit | 4–5 regrinds allowed (0.3mm material removal per grind) | Deep-hardened profiles allow deeper re-facing |
| Dimensional Tolerance | ±0.015 mm (CNC precision grinding) | ±0.01 mm via ultra-precise slow-feed Wire EDM |
| Blade-to-Die Clearance | Pre-set at 7% to 10% of workpiece thickness (optimized for A36 mild steel) | Custom clearanced sets for specialized stainless steel or structural alloy processing |
| Blade Machining Geometry | Three-sided progressive rake angle with micro-radius relief | Modified clearance profiles for high-tensile alloy runs |
Figure: Fully dimensioned CAD engineering drawing — critical mounting, clearance, and corner-radius parameters for DC53 / D2 rectangular notcher blades.
Our rectangular coping segments and lower matching dies are engineered as direct-fit parts for standard industrial ironworkers. Verify your model parameters below:
| Brand | Compatible Ironworker / Steelworker Models | Standard Notcher Capacity Matched |
|---|---|---|
| GEKA | Hydracrop 55/110, Hydracrop 80/150, Hydracrop 110/180, Microcrop 36, Minicrop | Rectangular coping units up to 12mm / 16mm plate gauge |
| SUNRISE | IW-60K, IW-80S, IW-100S, IW-125SD, PM-60T, PM-100T Multi-Stations | Factory standard 50.8mm x 90mm and custom wide-notch tools |
| PIRANHA | P-50, P-65, P-90, P-110, PII-88, PII-140 Single/Dual Operator Systems | Standard rectangular block alignment dimensions |
| EDWARDS | Edwards 50 Ton, 55 Ton, 65 Ton, 75 Ton, 100 Ton, 120 Ton JAWS Hydraulic Ironworkers | Standard coping block configurations |
| SCOTCHMAN | 50514-CM, 6509-24M, 9012-24M, DO 70, DO 85, DO 120 Component Models | Three-sided bypass blade sets |
Conventional coping dies fail most frequently at the two 90-degree internal corner points where side blades meet the front blade. This sharp intersecting geometry concentrates immense hydraulic stress, causing the tool steel to shear off or split. ALAS eliminates this structural defect with an integrated micro-radius corner relief geometry that evenly dissipates backward compression thrust.
→ Data Benchmark: 38%+ improvement in fracture resistance vs. sharp-cornered standard designs
When executing a deep cope cut, any fractional imbalance in blade-to-die clearance between the left, right, or front cutting faces causes the metal section to twist. This structural drift produces heavy burrs on one edge and dulls the opposite blade. Our CNC-ground rectangular tooling sets pass microscopic alignment inspection, ensuring perfectly uniform clearance across all three shearing surfaces.
→ Data Benchmark: Strict ±0.015 mm tolerances maintained across all three cutting faces
Multi-face heavy shearing punishes tool steel with repeated shock loading. We subject premium D2, DC53, and H13 tool blanks to multi-stage vacuum gas quenching paired with cryogenic sub-zero cold treatment. This metallurgical process eliminates residual internal stresses and optimizes the microstructure, ensuring the three-sided edge maintains extreme sharpness without brittle fracture or rounding.
→ Data Benchmark: 8,000–12,000 reliable shearing strokes per single grind under standard lubrication conditions
ALAS Industrial utilizes a rigorous material selection protocol to match specific structural shearing applications. For standard production runs demanding high wear resistance, our DC53 tool steel serves as the benchmark, offering 20% higher toughness than conventional D2 while maintaining a stable hardness of HRC 58–62 to prevent corner chipping. Our premium D2 formulations provide exceptional cost-to-performance efficiency for regular mild steel processing.
For high-shock, thick-gauge structural operations where tooling experiences severe impact load and heat generation, we offer custom-engineered H13 impact tool steel blades. Tempered to HRC 50–56, our H13 blades maximize shock absorption and dynamic structural flexibility, eliminating premature brittle failure under continuous heavy hydraulic stress.
1. Standard High-Efficiency Mass Production Run — Two Core Precision Stages:
Stage A — Rough Profiling: Our factory deploys automated CNC contour milling (Milling) for rapid, high-efficiency material removal, establishing the standard geometric envelope while preserving molecular integrity.
Stage B — Precision Finishing: After multi-stage vacuum heat treatment, components undergo high-precision surface grinding (Grinding) to bring all three rake faces to a mirror-like finish (Ra ≤ 0.8 μm).
→ Resulting Dimensional Accuracy: All critical mounting and cutting dimensions are held to ±0.015 mm across the full three-sided geometry.
This dual milling + grinding protocol keeps manufacturing costs competitive while delivering repeatable, high-precision tooling for regular stock items.
2. Precision Wire-Cut EDM Protocol for Custom Engineered Tooling:
For client submissions utilizing custom 3D STEP/CAD files (such as specialized notch clearances or non-standard joint offsets), we utilize slow-feed Wire-Cut EDM profiling. This stress-free precision cutting prevents micro-fissures along intricate internal radius points, guaranteeing a strict ±0.015 mm tolerance matching the specialized machine holder profiles perfectly.
Equipment: Geka Hydracrop 80/150, Sunrise IW-100S
Use Case: Rectangular cope notches on wide-flange beam webs for columns.
Requirement: Clean square corners; zero micro-chipping under high load.
Equipment: Edwards 100 Ton, Piranha P-90
Use Case: Notching angle iron and channels for lintel header production.
Requirement: Repeatable dimensions; extended blade life across long runs.
Equipment: Precision ironworkers and coping presses
Use Case: Rectangular clearances on profiles for curtain wall frames.
Requirement: Visibly burr-free cuts requiring zero post-processing grinding.
Nanjing Alas International Co., Ltd. operates an advanced 6,200 sqm manufacturing facility in Jiangning District, Nanjing, Jiangsu Province, China. Our infrastructure features a specialized in-house vacuum heat treatment department with dual-furnace setups. Our automated production lines maintain a dedicated monthly capacity of 1,500+ sets for complex rectangular and v-notching tools, as part of our total factory annual output of 60,000+ precision tools. We directly export to over 30 countries across North America, Europe, Southeast Asia, and Oceania, standing as a reliable engineering and manufacturing partner for heavy fabricators and global tooling distributors.
Q1: Why do my coping blades produce smooth cuts on the sides but leave heavy ragged burrs at the front edge?
A: As a professional tool manufacturer, we analyze this as an uncalibrated clearance issue or uneven knife wear profile across the tool assembly. In a three-sided rectangular cut, if the front cutting edge suffers slightly higher geometric erosion or has a wider default clearance than the left and right blades, the material will rip instead of cleanly shearing at the final stage of hydraulic penetration. We recommend checking blade-to-die tolerances on the front face using a feeler gauge first. If the clearance is uniform but burrs persist, inspect your ironworker's tool carrier guide rails for forward-thrust backlash or wear that may be causing a dynamic shift under load.
Q2: Can I use a standard rectangular notcher blade intended for mild steel to cut heavy stainless steel plates?
A: We strongly advise against using standard mild-steel cleared tools on stainless steel sections. Stainless steel grades such as 304 or 316 possess much higher work-hardening rates and tensile strength. They require an optimized, tighter blade clearance—typically 5% to 8% of the material thickness—along with highly polished rake surfaces to prevent galling. Attempting this with a standard clearance setup skyrockets required hydraulic tonnage, seizes material to the tool face, and causes instant corner chipping on the front blade.
Q3: What causes micro-chipping at the internal 90-degree corners of my notcher blades, and how can I prevent it?
A: Micro-chipping at internal corners results from stress concentration at the sharp intersection point where side blades meet the front blade. Each shearing stroke concentrates hydraulic pressure at these two points, exceeding the tool steel's local fracture strength. Prevention requires three measures: choose blades with integrated micro-radius corner relief geometry, ensure proper blade-to-die clearance calibration across all three faces, and select high-toughness materials like DC53 or impact-stabilized H13 tool steel rather than brittle options.
Q4: What is the minimum order quantity for rectangular notcher blades, and do you offer sample orders?
A: Our minimum order quantity is 1 piece for standard stock replacement tools, making it easy for small fabrication shops to order exactly what they need. Sample orders are available at standard unit pricing with no additional sample fees. Volume tiered discounts apply starting from 10 sets, with progressively better pricing at 50-set and 100-set quantities. Contact our sales team for a detailed quotation based on your specific requirements.
Contact ALAS Industrial today for a precision factory quote. Technical RFQs processed within 24 hours.
★ 100% Quality Inspected Before Shipment | Factory-Direct Pricing
Direct Contact: mt@alasmachinery.com | WhatsApp: +86 15852949220
Nanjing Alas International Co., Ltd. is a professional industrial tooling manufacturer focused on shear blades, bending dies, shredder blades, and custom wear parts. We offer full application engineering, material selection, setup guidance, and after-sales support to global customers.
Tell us your requirements, and our engineering team will provide professional solutions for blade specification, tool life optimization, and cost-effective production.
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