Professional shear blade manufacturer JSTMT: high-quality metal shear replacement blades & guillotine knives (H13, 9CrSi, D2, Cr12MoV) for Durma, Amada. Custom sizes available for foot-operated squaring shears and guillotine with 2 or 4 side shear cutting blade design. Beyond standard tools, we provide flat bar shear, angle shear, bar cutter, coper notcher blades, and custom metal shear blades for hydraulic ironworkers. Our cost-effective rotary shear blades ensure clean cuts for mild and stainless steel. With extensive OEM & export experience, we deliver premium industrial knives at factory prices worldwide.
Performance Replacement Shear Blades & Knife Solutions
JSTMT manufactures replacement shear blades for sheet metal shearing machines, with material grades and dimensions selected according to the cutting application.
Why Choose JSTMT for Industrial Metal Shear Blades?
JSTMT has been in the Sheet Metal Fabrication Industry since 1985, with mechanical processing equipment: Multi-task Machine centers, Boring & Milling machines, and lathes facilities, our company delivers high-quality and reliable small break presses, hydraulic shears, and shear steel knife.
- OEM & Universal Compatibility: Precision-engineered replacement blades fully compatible with major global brand shearers, including Durma, Amada, LVD, Trumpf, Accurpress, and Cincinnati.
- Engineering & Metallurgy Customization: Our engineering team optimizes blade geometry, edge profiles, and heat-treatment hardness (HRC) tailored to your specific sheet material, plate thickness, and cutting volume.
- Strict Quality & Tolerance Control: Every blade undergoes precision grinding and vacuum heat treatment, achieving strict parallelism tolerances ( <±0.01mm) and 100% heat-number material traceability.
- Direct Industrial Shear Blade Manufacturer : As a primary OEM manufacturer, we offer full technical support, transparent lead times, and global export compliance across 50+ countries.
Contact our engineering team today for a custom quote on high-quality plate shear blades!
What is industrial shear blade sharpening and material?
Sharpen or replace your shear knives for maximum wear resistance and impact strength. when hydraulic metal stomp shears blade sharpening is tough, it can be surface ground to the same precision tolerances to maintain a high level of productivity and ensure the finest cut quality.
The shear knife blades are made of special steel alloy, with full heat treated through the toughest conditions. The plate shear blade material can be SKD11, D2, or 6CrW2Si. Our blades are available in two-edge, and four cutting edges. We have manufactured blades for many shear brands: Accur, Amada, Trumpf, and LVD. We offer complete designs for unique, obsolete, as well as custom designs for homemade shears. we offer ironworker shear blades and replacement shear blades.
Industrial Shear Blade Applications
JSTMT replacement shear blades are designed for industrial metal-cutting applications, with blade geometry, material grade, and dimensions selected according to the machine and cutting requirements.
Common Cutting Applications
- Sheet and Plate Cutting: Cutting mild steel, stainless steel, and aluminum sheets or plates to specified dimensions.
- Strip Cutting: Dividing metal sheets into narrower strips for downstream fabrication.
- Guillotine Shearing: Replacement upper and lower blades for compatible guillotine shearing machines.
- Swing Beam Shearing: Application-specific blades designed for the cutting movement and geometry of swing beam shears.
Materials and Machine Compatibility
Blade selection depends on the material being cut, its thickness and strength, the required cutting quality, and the shearing machine design. JSTMT supplies standard and customized replacement blades for compatible shearing machines and industrial cutting equipment.
To identify a suitable shear blades replacement, provide the machine brand and model, blade dimensions, material grade, and typical cutting thickness.
Strip cutting
Sheet Cuts
Sheet Pallets
How Metal Shear Blades Work?
Metal shear blades operate by applying high shear force between a top moving blade and a fixed lower blade set at a relative angle. As the upper blademoves past the lower blade set (mounted on the blade holder) , the sheet metal material separates along the cutting line.
Three factors directly affect cutting performance:
- Blade Clearance: The gap between the upper and lower blades must be appropriate for the material type and cutting thickness. Incorrect clearance can increase burrs, distortion, and blade wear.
- Blade Angle: The shear angle influences cutting force and material deformation. The appropriate angle depends on the machine design and cutting application.
- Blade Condition: Sharp cutting edges, correct alignment, and suitable blade material help maintain consistent cut quality and service life.
For cutting various thicknesses of sheet metal, blade selection must match the machine's capacity and operating requirements.For metal shear replacement blades, confirm the shearing machine type, blade dimensions, material being cut, and required cutting thickness before selecting a blade.
Technical Resources & Troubleshooting Guides
To ensure the longest lifespan for your shear blades, correct setup and material selection are critical. Browse our technical library below to optimize your shearing production:
- Setup Guide: Before installing new knives, ensure you set the correct gap. View our [Shear Blade Gap Clearance Chart] for Mild Steel vs. Stainless Steel.
- Material Selection: Not sure which grade to buy? We compare [9CrSi vs. 6CrW2Si vs. H13 Materials] to help you choose the longest-lasting steel for your application.
- Troubleshooting: Is your machine cutting curved or twisted parts? Read our guide on [5 Common Shearing Defects] (Twist, Bow, & Camber) and how to fix them.
- Maintenance: Wondering if you can save money by grinding old blades? Read our cost analysis on [Sharpening vs. Replacing Shear Blades].
FAQ- Frequently asked questions
The replacement shear blade is a cutting blade for the metal shear machine. It is composed of a top moving blade and a lower blade. The material is made of high chrome or high carbon steel for extended blade life. It works by clamping the material with the upper blade and the lower blades with a fixed cutting angle.
The shearing cutting blades are used for cutting steel plates into different strips with exacting tolerances. It is an important spare parts in the shearing machine. The shear knives include a top blade and bottom blade, and can be used for cutting different materials such as mild steel, stainless steel, and aluminum.
JSTMT manufactures high-performance shear blades utilizing premium SKD11, DC53, and H13 tool steels with precise parallelism and vacuum heat treatment for optimal cutting performance.
What materials are often used for the blades of the shears
Shearing( die cutting) is a process that cuts stock without the formation of metal chips. If the cutting blades are straight the process is called shearing; if the cutting blades are curved then they are shearing-type operations.
The Hydraulic metal cutting shear is a kind of machine that uses the moving upper blade and fixed lower blade to apply shear force to metal plates of various thicknesses by using reasonable blade clearance, to break and separate the plates according to the required size.
The replacement shear blades are available in two-edge for swing beam shear and four-edge for guillotine shear. and the material of the shearing machine blade parts is hardened to ensure consistent hardness; The hardening and tempering furnace can handle shear blades up to 16 feet in length.
- Two side edge shear knife. It is used for swing beam shear with two sides flat and two sides inclinable edge. The movement route is a circular line.
- Four side edge shear knife. It is used for a guillotine shear. The movement route is a straight line.
Swing Beam Shear blade design
Catalogue
