Radius Range: R5 - R200mm
Material: Steel / Urethane
Type: Arc Bending Die
CNC Bending Machine Arc Mold - Radius Bending Tooling
Smooth Radius
No Bend Lines or Kinking

CNC Bending Machine Arc Mold

Advanced radius bending tooling engineered for precision arc formation on CNC press brakes. Produces consistently smooth curved bends without bend lines, kinking, or material marking. Available in steel and urethane configurations for diverse radius applications from R5 to R200mm.

Smooth radius formation without visible bend lines or segmentation
Mar-free bending with urethane dies for pre-finished materials
Custom radius from R5 to R200mm for diverse arc applications

Technical Specifications

Professional radius bending tooling for smooth arc formation on CNC press brake machines

Arc Radius Capacity

  • Standard Radius: R5, R8, R10, R15, R20, R25
  • Large Radius: R30, R40, R50, R60, R80, R100
  • Extra Large: R120, R150, R200mm
  • Custom Radius: Available on request

Material Options

  • Steel Dies: Heat-treated 42CrMo (HRC 45-52)
  • Urethane Dies: High-strength polyurethane
  • Hybrid: Steel core with urethane surface
  • Precision ground and polished finish

Die Configurations

  • Single Radius Punches (fixed radius)
  • Adjustable Radius Systems (multi-radius)
  • Bump Forming Tooling (segmented arcs)
  • Standard Lengths: 500mm, 835mm, custom

Why Choose Our Arc Mold Radius Tooling?

Superior radius bending solutions engineered for smooth arc formation, mar-free finishing, and consistent repeatability in demanding production environments

⚑

Smooth Radius Formation

Produces consistently smooth curved bends without visible bend lines, kinking, or segmentation marks for superior aesthetic quality

πŸ”§

Mar-Free Bending

Urethane die surfaces achieve entirely clean, mark-free bends allowing use of pre-finished or pre-painted sheet metal materials

πŸ’ͺ

Versatile Radius Range

Wide range from small R5mm radii to large R200mm arcs, with adjustable systems offering multiple radii using the same bottom die

πŸ“

Reduced Springback

Properly matched punch radius (63% of material thickness) minimizes springback and ensures consistent bend angles across production runs

πŸ›‘οΈ

Extended Tool Life

Greater die radius reduces friction during bending, minimizing wear and extending tool life for cost-effective production

πŸ’°

Cost-Effective Solution

Eliminates secondary finishing operations and reduces material waste from failed bends, lowering overall production costs

Radius Tooling Types & Methods

Comprehensive range of arc mold tooling solutions for diverse radius bending applications and material requirements

Steel Radius Punch

Steel Radius Punches

Precision-machined steel punches with fixed radius profiles from R5 to R100mm. Manufactured from heat-treated 42CrMo steel with HRC 45-52 hardness for durability. Tip radius designed at minimum 63% of material thickness to prevent stress concentration. Ideal for standard production radius bending with consistent repeatability.

Urethane Radius Dies

High-strength polyurethane bottom dies providing mar-free bending for pre-finished and pre-painted materials. Forgiving urethane material achieves clean bends without surface marking or scratching. Compatible with standard V-die holders. Ideal for architectural panels, appliances, and decorative metalwork requiring pristine surface finish.

Urethane Radius Die
Large Radius Tooling

Large Radius Tooling Systems

Custom-engineered systems for forming large radius arcs (R80-R200mm) that exceed standard press brake table limits. Features modular segmented design for flexible radius adjustment. Compatible with CNC press brakes for automated radius control. Suitable for architectural metalwork, transportation equipment, and large curved panels.

Bump Forming Tooling

Specialized tooling for creating large radius arcs using multi-step bump forming technique. Approximates smooth arc with series of small incremental bends. Uses standard V-dies and punches with CNC programming for consistent results. Cost-effective solution for large radius applications without dedicated radius tooling investment.

Bump Forming Tooling
Adjustable Radius System

Adjustable Radius Systems

Versatile tooling allowing multiple radius options using same bottom die by changing interchangeable radius punches. Reduces tooling inventory requirements while maintaining flexibility. Quick-change mounting for rapid setup between different radius specifications. Ideal for job shops handling diverse radius bending requirements.

Hybrid Steel-Urethane Dies

Advanced tooling combining steel core structural strength with urethane surface layer for mar-free bending. Provides durability of steel with surface protection of urethane. Suitable for high-volume production requiring both strength and surface quality. Extended tool life compared to pure urethane with maintained mar-free performance.

Hybrid Steel-Urethane Die

Applications

Arc mold radius tooling is essential for creating smooth curved bends across diverse industries and applications

Architectural Metalwork

Creating curved fascias, decorative panels, rounded building elements, and architectural features with smooth radius bends

Automotive Body Panels

Forming fenders, hoods, door panels, and other curved automotive components requiring smooth radius without surface marking

HVAC Ductwork

Bending curved duct sections, radius elbows, and custom ventilation components for commercial HVAC systems

Furniture & Fixtures

Manufacturing curved metal furniture frames, shelving with radius bends, and decorative metal fixtures

Appliance Manufacturing

Creating curved panels for refrigerators, washing machines, and appliances requiring smooth radius edges

Transportation Equipment

Forming curved components for buses, trains, trailers, and specialty vehicles requiring large radius bends

Signage & Displays

Creating curved letters, rounded sign faces, and display stands with smooth arc formation

Industrial Enclosures

Bending rounded corners for control cabinets, electrical enclosures, and protective covers

Standard & Optional Tooling

Complete arc mold solutions with standard radius configurations and optional custom tooling for specialized applications

βœ“

Standard Radius Tooling

  • ● Standard radius punches (R5-R50mm)
  • ● Heat-treated steel construction (42CrMo)
  • ● Hardness: HRC 45-52
  • ● Precision ground radius profile
  • ● Standard lengths: 500mm, 835mm
  • ● Compatible with standard V-dies
  • ● Anti-corrosion surface treatment
  • ● Standard European/Amada compatibility
  • ● Quality inspection certificate
  • ● Standard protective packaging
+

Optional Upgrades

  • ● Large radius punches (R60-R200mm)
  • ● Urethane radius dies (mar-free)
  • ● Hybrid steel-urethane construction
  • ● Adjustable radius tooling systems
  • ● Bump forming tooling packages
  • ● Custom radius profiles (non-standard)
  • ● Enhanced hardness (HRC 54-58)
  • ● Custom lengths and dimensions
  • ● Quick-change mounting systems
  • ● Premium protective wooden cases

Need custom radius tooling for your application?

Contact Our Experts

Frequently Asked Questions

Common questions about arc mold and radius bending tooling

Q:What is the difference between bump forming and radius tooling?

Bump forming uses standard V-dies and punches with CNC programming to create large radius arcs through multiple small incremental bends (approximating the arc with linear segments). Dedicated radius tooling uses specially profiled punches and dies to create smooth radius bends in a single operation. Bump forming is cost-effective for occasional large radius work, while dedicated radius tooling provides superior surface finish and faster production for regular radius bending applications.

Q:When should I use urethane dies instead of steel?

Use urethane dies when bending pre-finished, pre-painted, or polished materials where surface marking is unacceptable. Urethane provides mar-free bending ideal for architectural panels, appliances, decorative metalwork, and any application where surface quality is critical. Steel dies are preferred for higher production volumes, harder materials, or when surface marking isn't a concern. Hybrid steel-urethane combines both benefits.

Q:How do I select the correct radius for my application?

The punch radius should be at least 63% of material thickness to prevent stress concentration. For air bending, the internal radius forms at approximately 15-20% of the V-die opening width. Match your punch tip radius to the natural internal radius created by the die opening for consistent angles. Consider material springback (stainless steel requires 1-2Β° compensation). Consult our technical team with your material specifications for optimal radius selection.

Q:Can you manufacture custom radius profiles?

Yes, we specialize in custom radius tooling for unique applications. Provide your required radius dimensions, material specifications, production volume, and part drawings. Our engineering team will design custom arc molds optimized for your specific application. Custom tooling is particularly cost-effective for high-volume production runs requiring consistent radius specifications not available in standard tooling catalogs.

Q:What is the maximum radius I can achieve on a press brake?

Maximum achievable radius depends on press brake table width and tooling system. Standard radius punches typically range from R5 to R100mm. Large radius tooling systems can achieve R120-R200mm. For radii exceeding these limits, bump forming can create virtually any radius through programmed multi-step bending. Large radius applications may require specialized extended-reach tooling or custom engineered solutions.

Q:How do I minimize springback in radius bending?

Springback increases with material hardness and decreases with larger bend radius. To minimize springback: use properly matched punch radius (63% minimum of material thickness), apply sufficient tonnage for bottom bending rather than air bending, compensate bend angle 1-2Β° for stainless steel, use larger die opening to reduce stress, and consider coining for zero springback applications. Material-specific springback tables help predict and compensate for springback in production.

Have a radius tooling question?

Contact our technical team β†’

Download Arc Mold Catalog

Get comprehensive technical specifications, radius charts, material options, and application guides for our complete range of arc mold and radius bending tooling.

Download PDF
Size: 2.9 MB | Pages: 18