APPLICATIONS
Perform the desired sheet metal bending operation using the required bending technique.
GUNNARPRESS ®– We can offer any standard or special types of press brake tools .For main press brake systems such as Promecam–EURO system, Trumpf-WILA system, Bystronic system, etc.
We can supply a rich selection of standard shapes or make any special tools under the request of the customer including the length of 6000-8000 mm in one piece, together with specialized technical customer support for any press brake bending application.
All application fields
Trusted by automotive Oems, aerospace suppliers, and electronics manufacturers, GUNNARPRESS solutions optimize productivity by reducing installation time, reducing material waste, and extending tool life.
AEROSPACE
AEROSPACE
Shipbuilding
Shipbuilding
Automotive
Automotive
Household appliances
Household appliances
Public art
Public art
Metal working
Metal working
Medical device
Medical device
Construction
Construction
Home decoration
Home decoration
GUNNARPRESS PRESS BRAKE TOOLINGS OVERVIEW
The following images showcase product test results for our distributors or feedback from end-users, presented here for your reference.
Standard Punch ＆ Roll Die
(L-bending)
Structure: Features a standard gooseneck or straight punch paired with a roll-type lower die that reduces surface marking and wear.
Application: Ideal for general-purpose bending in electrical enclosures, HVAC parts, and steel furniture.
Advantages: Smooth operation, high repeatability, and minimal material scratching—especially suitable for coated or polished surfaces.
Acute /Sharp Punch
(V-bending)
Structure: Narrow punch tip with a sharp forming angle, often paired with a narrow V-die to achieve deep, precise bends.
Application: Common in aerospace components, precision brackets, and small fixture parts.
Advantages: Achieves tight-angle bends without cracking, offers excellent precision, and is compatible with complex part geometries.
large radius punch ＆Multi-V Die
(R-bending)
Structure: Includes a rounded punch tip and a multi-width V-die with interchangeable openings to suit different thicknesses.
Application: Widely used in architectural panels, elevator interiors, and heavy-duty aluminum components.
Advantages: Reduces material springback, allows for forming a variety of bend sizes, and enhances finish on visible surfaces.
Hemming Toolings
(flat Bending)
Structure: Typically includes a two-stage setup: one die for acute-angle pre-bending, and another for flattening the bend.
Application: Common in cabinet doors, automotive panels, and appliance parts.
Advantages: Delivers consistent hems, enhances product safety, and supports decorative finishes.
Gooseneck Punch ＆ 2-die
(L/Z/V-Bending)
Structure: Features a curved throat design to provide extra clearance during bending.
Application: Ideal for enclosures, box shapes, and nested bends.
Advantages: Allows complex bends without interference, increases design flexibility.
Radius punch ＆ Big single V die
(R-Bending)
Structure: Rounded punch nose with a matching die to support wide-radius bends.
Application: Suitable for aluminum facades, thick materials, or parts requiring stress relief.
Advantages: Prevents cracking, improves appearance, and ensures smooth bending.
Offset Bending Tools
(Z-Bending)
Structure: Dual-level punch and die configuration with fixed offset height.
Application: Used for brackets, HVAC panels, and sheet metal interlocks.
Advantages: Increases productivity, ensures consistent offset height, and simplifies bending sequence.
Acute Angle Punch ＆ V-die
(V-Bending)
Structure: Punch and die pair configured to support tight-angle forming.
Application: Used in custom brackets, structural fittings, or decorative folds.
Advantages: Enables high-precision sharp bends and supports hard or springy materials.
Channel Forming Tools
(U-Bending)
Structure: Deep cavity die with precision punch for symmetrical wall forming.
Application: Used in structural frames, drawer rails, and machine enclosures.
Advantages: Reduces springback, increases forming consistency, and simplifies deep flanging operations.
Roller V / Rotating die
(No-mark Bending)
Structure: Incorporates rollers or rotating inserts in the die contact area.
Application: Ideal for stainless steel, aluminum, pre-painted, or film-coated sheets.
Advantages: Reduces forming force, extends tool life, and ensures a flawless surface finish.
Louver /Embossing Tool
(Louver Form Bending)
Structure: Precision punch and die set with vent or pattern profiles.
Application: Electrical boxes, HVAC panels, brand marking on products.
Advantages: Enhances part functionality, eliminates secondary machining, and supports creative designs.
Hinge Forming Punch and Die
(Hinge Bending)
Structure: Complex profile punch and die to roll material into hinge loops.
Application: Toolbox lids, cabinet doors, and electrical panel covers.
Advantages: Reduces assembly steps, eliminates welding, and improves part strength.
Arrow Punch ＆ Multi-V Die
(L/U/V/Step Bending)
Structure: Standard punch and die used repeatedly with varying back gauge positions.
Application: Used for ductwork, architectural panels, and curved steel designs.
Advantages: Flexible, cost-effective alternative to radius dies for large forms.
Adjustable Die
(L/U/V Bending)
Structure: Features a rotating or multi-position design to quickly switch between various die widths.
Application: Ideal for job shops, prototyping, and multi-material production lines.
Advantages: One tool fits multiple tasks—reduces the need to change dies frequently, saving time and cost.·
Rib Punch and Die
Design: Punch and die profiles are matched for consistent rib shapes—straight, curved, or custom patterns.
Application: Electrical cabinets, HVAC ducts, machine covers, and industrial trays.
Advantages: Enhances strength while keeping parts lightweight—a key solution for structural optimization.
Radius Tool with PU-Insert
(No-mark Bending)
Structure: Combines a standard radius punch with a lower die that includes a soft polyurethane (PU) insert. The PU insert supports the material during bending, providing flexible resistance and smooth contact.
Application: Ideal for stainless steel kitchen panels, aluminum claddings, elevator doors, decorative sheets, and thin-walled parts with sensitive surfaces.
Advantages: Enables large-radius forming without surface damage, reduces springback, supports bending of soft or pre-coated materials, and improves appearance with no visible tooling marks.
Heavy Duty Bending Tool
(Thick Sheet Bending)
Structure: Made from hardened tool steel (e.g. 42CrMo or SKD11), with reinforced body sections, large punch radii, and deep-V dies. Often features bolted or modular designs for improved load resistance and maintainability.
Application: Commonly used in construction equipment parts, energy sector enclosures, trailer frames, shipbuilding panels, and heavy machinery components.
Advantages: Handles high bending forces without deformation, ensures long service life under extreme loads, provides precise and stable forming for thick or wide materials, and supports tonnage up to 1000T or more.
Corrugated Die
Structure: Matched punch and die set with alternating ridges and grooves. The forming surface is typically machined or wire-cut to precise wave profiles.
Application: Used in ventilation ducts, metal roofing, decorative wall panels, machine covers, and protective enclosures.
Advantages: Enhances structural rigidity without increasing material thickness, offers anti-slip or aesthetic surfaces, and supports lightweight design in architectural and industrial applications.
Swing Ear Sections Punch＆2-Die
Box Bending)
Design: Typically incorporates an offset or sliding punch to shape and partially lift the metal flap.
Application: Electrical enclosures, control boxes, chassis with hanging flanges or mounting tabs.
Advantages: Precise tab forming in one stroke, improves downstream assembly efficiency.
Windows Tool
Structure: Typically consists of a male punch and female die cavity, precisely aligned using guides or locating pins. Shapes can be rectangular, oval, slotted, or custom cutouts.
Application: Commonly used in control panels, switchgear doors, HVAC covers, and electrical enclosures where ports or windows are needed.
Advantages: Provides clean, accurate cutouts in one press stroke, improves airflow or accessibility, and reduces the need for secondary operations like laser cutting or drilling.
Round Bar Tool
(Round Bar Bending)
Structure:Typically consists of a concave punch and a V- or U-shaped die cavity. The contact surfaces are rounded and reinforced to handle the high pressure required for bar bending. Custom radii and groove sizes are available depending on bar diameter.
Application: Used in the fabrication of handles, structural reinforcements, brackets, handrails, furniture frames, and industrial hardware involving solid round stock.
Advantages: Enables clean, accurate bending of solid rods without surface cracking or ovalization. Provides consistent bending angles and supports various bar diameters from small wires to thick rods.
3D RENDERS
The following images display key punch types such as standard, acute, and sash punches. These 3D renders are based on actual test tools for our distributors or feedback from end users, and are shown here for your reference.
Sash Punch
Standard Punch
Acute Punch
Arrow Punch
Gooseneck Punch
Multi-V Die
Big single V die
single V die
Two V die
Press Brake Tooling Applications
Technical FAQ
Press brake tooling is used for air bending, bottoming, and coining across industries such as automotive, electrical cabinets, construction panels, and stainless steel fabrication. Typical material thickness ranges from 0.5 mm to 20 mm, depending on tooling geometry and press brake capacity.
A common rule is:
V-opening (V) = 6 × material thickness (t) for standard air bending.
V=6t
For stainless steel or high-strength materials, V = 8t–10t is recommended to reduce cracking risk.
Example:
2 mm steel → V = 12 mm
3 mm stainless steel → V = 24–30 mm
Note: The actual V-opening depends on material type, thickness, bending method, and precision requirements. For optimal tooling selection, please consult our engineers.
30° / 28° acute punch → for bending angles < 90° (with spring-back compensation)
85° / 88° standard punch → for general 90° bending
Radius punch (R1–R20+) → for large radius forming
Punch selection directly affects final angle accuracy and material stress distribution.
Note: The optimal punch angle varies depending on material properties, thickness, spring-back behavior, and bending method. Please consult our engineers for the best configuration.
High-precision applications require:
Precision-ground punches and dies
Hardness: HRC 48–52 (working surface)
Parallelism tolerance: ≤ 0.02 mm / 1000 mm
Compatible systems such as Amada, Wila, and European-style tooling ensure interchangeability and repeatability.
Note: Final accuracy depends on machine condition, tooling system, material properties, and operator setup. Please consult our engineers for a complete solution.
For thin sheets:
Use small V-opening (4t–6t)
Sharp punch tip radius (R ≤ 0.2–0.4 mm)
Lower tonnage and precise backgauge control
This prevents deformation, wrinkling, or angle inconsistency.
Note: Thin sheet bending is highly sensitive to material type, thickness variation, and machine accuracy. Please consult our engineers for optimal tooling selection.
Yes. Custom tooling is required for:
Box bending with deep return flanges
Offset / Z-bending
Special profiles and closed shapes
Custom solutions improve feasibility, reduce trial time, and ensure production consistency.
Note: Custom tooling design depends on part geometry, material, and production requirements. Please consult our engineers for tailored solutions.
Typical guidelines:
Mild steel: R ≥ 1 × thickness (t)
Stainless steel: R ≥ 1.5–2 × t
Aluminum: R ≥ 0.8–1 × t
Using too small a radius may cause cracking, especially in high-strength or coated materials.
Note: Minimum bend radius varies with material grade, thickness, and forming method. For precise recommendations, please consult our engineers.
Use anti-marking solutions such as:
Roll dies
Wing dies (mark-free bending tooling)
Polyurethane inserts
These reduce surface pressure and are suitable for #4 finish, mirror stainless steel, or coated sheets.
Note: Anti-marking performance depends on material surface condition, thickness, and bending pressure. Please consult our engineers for suitable tooling solutions.
A simplified formula for bending force is:
F=
Where:
F = bending force (kN)
σ = tensile strength (MPa)
L = bending length (mm)
t = thickness (mm)
V = die opening (mm)
Example:
2 mm mild steel, 1000 mm length → approx. 30–40 tons
Note: Actual tonnage varies significantly depending on material strength, thickness, tooling selection, and bending method. Please consult our engineers for accurate calculation.
Large radius tooling is recommended when:
Required radius R ≥ 5 mm
Thick plates (>6 mm)
Structural parts with stress requirements
Multi-V dies (e.g., V = 12 / 16 / 22 / 30 mm) allow flexible production without frequent tool changes.
Note: Tooling configuration depends on material strength, thickness, and final geometry. Please consult our engineers for customized solutions.
High-quality tooling typically uses:
42CrMo
Surface hardness: HRC 48–52
Deep hardening for wear resistance
This ensures long service life, stable angles, and reduced maintenance costs.
Note: Tool life varies depending on application conditions, material type, and production volume. Please consult our engineers for detailed recommendations.
Efficiency can be increased by:
Quick clamping systems (tool change < 1–2 minutes)
Standardized tooling systems
Multi-functional dies
CNC crowning systems for long parts (>2000 mm)
Note: Efficiency improvements depend on machine setup, tooling system, and production requirements. Please consult our engineers for optimization strategies.
Our products
Visit our products page for an overview of all GUNNAR PRESS BRAKE TOOLINGS
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