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Radius Die is a specialized tooling component used in press brake bending, metal forming, and stamping operations to create smooth curved bends and controlled radii in sheet metal parts. Unlike sharp-angle dies that produce distinct corners, a radius die forms a gradual curve, reducing stress concentration and improving the structural integrity of the finished component.
Radius dies are commonly used when product designs require smooth transitions, improved aesthetics, enhanced fatigue resistance, or compliance with engineering specifications that prohibit sharp bends.
Radius Die
A radius die functions together with a compatible punch to form sheet metal into a curved profile.
The metal sheet is positioned over the die.
The punch descends and applies force to the material.
The die's curved profile controls the bend radius.
The material conforms to the die geometry and retains the desired radius after forming.
The resulting bend is smoother than a conventional V-bend, reducing stress concentrations and improving part performance
Different manufacturing applications require different radius die configurations.
Designed for CNC and conventional press brake machines.
Common applications include:
Architectural panels
Control cabinets
Decorative metal products
Precision enclosures
Consistent bend radii
High dimensional accuracy
Excellent surface quality
Used for forming wide, gradual curves.
Typical applications:
Automotive body panels
Transportation equipment
Aerospace components
Structural sheet metal parts
Designed for edge-folding and safety hem applications.
Common uses:
Automotive doors
Appliance panels
Metal furniture
Consumer products
Manufactured according to customer specifications.
Customization options include:
Radius size
Die width
Tool height
Material type
Surface treatment
Smooth bends reduce stress concentration and minimize cracking risks.
Radius forming allows metal to deform more naturally during bending.
Curved bends create a cleaner, more professional appearance.
Parts with larger radii typically perform better under repeated loading conditions.
Precision tooling ensures repeatable results throughout production runs.
Radius dies are available in various sizes depending on application requirements.
Typical radius options include:
R1 mm
R2 mm
R3 mm
R5 mm
R8 mm
R10 mm
R15 mm
R20 mm
Custom radii
The optimal radius depends on:
Material thickness
Material type
Product design specifications
Bending method
Radius dies are widely used across multiple industries.
Applications include:
Body panels
Reinforcement structures
Interior components
Used for:
Aircraft panels
Lightweight structural parts
Precision assemblies
Common applications:
Decorative panels
Facade systems
Metal cladding
Used in:
Equipment enclosures
Server cabinets
Electrical housings
Applications include:
Refrigerator panels
Washing machine components
Air conditioning housings
The durability and performance of a radius die largely depend on its material.
Features:
Excellent wear resistance
Long service life
Good dimensional stability
Advantages:
High hardness
Excellent toughness
Reliable performance in high-volume production
Benefits:
Cost-effective solution
Good wear resistance
Suitable for medium-volume manufacturing
Features:
Superior toughness
Extended tool life
Excellent edge retention
Radius dies typically undergo:
Vacuum hardening
Quenching
Tempering
Stress relief treatment
These processes improve hardness and dimensional stability.
Benefits:
Increased wear resistance
Longer service life
Benefits:
Lower friction
Enhanced forming performance
Benefits:
Exceptional hardness
Reduced galling and wear
Several factors must be considered when selecting or designing a radius die.
Thicker materials generally require larger bend radii.
Different materials have different minimum bend radius requirements.
Examples:
Stainless steel
Mild steel
Aluminum
Copper
Brass
The die radius must match engineering specifications and product requirements.
Material springback should be considered when determining die geometry.
High-volume production may justify premium materials and coatings.
Custom or non-standard radii increase manufacturing costs.
Higher-grade tool steels increase initial investment but extend lifespan.
Tighter tolerances require advanced machining and inspection processes.
Premium coatings improve performance while increasing cost.
Bulk production generally reduces the unit price.
A radius die is used to create smooth curved bends and controlled radii in sheet metal forming applications.
Radius dies reduce stress concentration, improve appearance, and provide smoother bends.
Yes. Manufacturers can customize radius dimensions, die widths, materials, and coatings.
Common materials include stainless steel, carbon steel, aluminum, copper, and brass.
The correct radius depends on material thickness, material properties, and product design requirements.
A Radius Die is an essential tooling solution for producing smooth, accurate, and structurally sound bends in sheet metal fabrication. By controlling bend radii and improving material flow, radius dies help manufacturers achieve superior product quality, enhanced durability, and improved aesthetic appearance.
With proper material selection, heat treatment, and surface coating, radius dies provide long service life and consistent performance across automotive, aerospace, architectural, electronics, appliance, and industrial manufacturing applications.
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+86 255 726 8551
E-mail: cnstamp@cnstamp.net
Add.: Mingjue Industrial Zone, Shiqiu, Lishui, Nanjing City, Jiangsu China 211223
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